Updated in October, 2019 1

Xiong Liu Harvard-Smithsonian CFA 60 Garden Street, MS-50 Cambridge, MA 02138

Tel: (617) 496-2136 Fax: (617) 495-7455 Email: xliu at cfa.harvard.edu Web: www.cfa.harvard.edu/~xliu

Education • Ph.D., 2002, Atmospheric Science, University of Alabama in Huntsville • M.S., 2002, Computer Science, University of Alabama in Huntsville • M.S., 1998, Environmental Chemistry, Research Center for Eco-environmental Sciences,

Chinese Academy of Sciences • B.S., 1995, Environmental Chemistry, Nankai University, China

Research Interests • Remote sensing of atmospheric trace gases, aerosols, and clouds, data validation, analysis • Atmospheric radiative transfer modeling and instrument calibration • Tropospheric chemistry integrating satellite, in-situ measurements and model simulations • Chemical, radiative, and biological effects of natural and human activities on air quality and

climate change Work Experience • 1.2010-, Physicist, Harvard-Smithsonian Center for Astrophysics • 2009-1.2010, Associate research scientist, GEST, UMBC • 5.2007-1.2010, Assistant research scientist, GEST, UMBC • 2004–5.2007, Research scientist, Harvard-Smithsonian Center for Astrophysics • 2003, Postdoctoral fellow, Harvard-Smithsonian Center for Astrophysics • 1998–2002, Research assistant, University of Alabama in Huntsville • 1996–1998, Research assistant, Research Center for Eco-environmental Sciences, CAS Professional Organization and Activities • Deputy Principal Investigator, Tropospheric Emissions: Monitoring of Pollution (TEMPO),

2013-present • Member, American Geophysical Union, 2003-present • Member, SAO Professional Accomplishments Evaluation Committee (PAEC) 11-13, 2014-

present • Member, SAO Computation Facility Scientific Advisory Committee (CFSAC), 2013-2014 • Member on OMI, UVAS, GEO-CAPE, TOAR, MAGEAQ, GLORY, OCO-2, NPP/OMPS,

TOMS science teams • Member, Korea GEMS Scientific Advisory Group, 2009-present • Member, Absorption Cross Sections of Ozone (ACSO) expert team, 2009-present • Editor, Advances in Atmospheric Research, 2015-present • Reviewer for Advances in Atmospheric Science, Advances in Meteorology, Analytical

Chemistry, Applied Optics, Atmospheric Chemistry and Physics, Atmospheric Environment, Atmospheric Measurement Technique, Atmospheric Science Letters, Canadian Journal of Physics, Chinese Science Bulletin, Environment Science and Technology, GRL, IEEE TGRS,

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International Journal Remote Sensing, Journal of Applied Remote Sensing, Journal of Atmosphere Solar-Terrestrial Physics, JGR, JQSRT, Nature, Remote Sensing Environment, IGARSS meeting Abstracts

• Reviewers for Proposals: NASA, DOE/ARM, Canadian Space Agency, Netherlands Organization of Scientific Research

• Convener/Co-convener, session “Advances in remote sensing of fires, aerosols, and trace gases for air quality applications,” AGU fall meeting, 2014-2016.

Honors • 2018, William T. Pecora Award to OMI International Science Team • 2011, 2013, 2016, 2017, 2018, Special Achievement award at the Smithsonian Astrophysical

Observatory • 2015, NASA Langley DISCOVER-AQ Science Team Group Achievement Award • 2014, La Recherche award in Environmental 2014 for IASI/GOME-2 tropospheric O3 paper

led by Cuesta et al. (2013). • 2013, NASA TEMPO Group Achievement Award • 2009, NASA OMI Science Team Group Achievement Award • 2006, NASA New Investigator Program Award • 2006, Early Career and New Faculty Scientist travel award for AQRS Workshop • 1998-2002, UAH Dean’s List

Manuscripts Submitted 1. Kajino, M., S. Hayashida, T. T. Sekiyama, M. Deushi, K. Ito, and X. Liu, Can a satellite

sensor detect lower tropospheric ozone responses to its precursor emission changes? submitted to Scientific Reports, 2019.

2. Souri, A.H., H. Wang, G. Gonzalez Abad, X. Liu, K. Chance, Quantifying the Impact of Transpiration from Crops on an Extreme Heat Wave Event in the Midwestern U.S.: A Top-down Constraint from MODIS Water Vapor Retrieval, submitted to J. Geophys. Res., 2019.

3. Lu, X., L. Zhang, T. Wu, M. S. Long, J. Wang, D. J. Jacob, F. Zhang, J. Zhang, S. D. Eastham, L. Hu, L. Zhu, X. Liu, and M. Wei, Development of the global atmospheric general circulation-chemistry model BCC-GEOS-Chem v1.0: model description and evaluation, submitted to Geoscientific Model Development, 2019.

Peer-Reviewed Publications 1. Jung, Y., G. Gonzalez Abad, C.R. Nowlan, K. Chance, X. Liu, O. Torres, and C. Ahn,

Explicit aerosol correction of OMI formaldehyde retrievals, Earth Space Science, doi 10.1029/2019EA000702, 2019.

2. Tarasick, D, Galbally, IE, Cooper, OR, Schultz, MG, Ancellet, G, Leblanc, T, Wallington, TJ, Ziemke, J, Liu, X, Steinbacher, M, Staehelin, J, Vigouroux, C, Hannigan, JW, García, O, Foret, G, Zanis, P, Weatherhead, E, Petropavlovskikh, I, Worden, H, Osman, M, Liu, J, Chang, K-L, Gaudel, A, Lin, M, Granados-Muñoz, M, Thompson, AM, Oltmans, SJ, Cuesta, J, Dufour, G, Thouret, V, Hassler, B, Trickl, T and Neu, JL. 2019. Tropospheric Ozone Assessment Report: Tropospheric ozone from 1877 to 2016, observed levels, trends and uncertainties. Elem Sci Anth, 7: 39. doi: https://doi.org/10.1525/elementa.376.

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3. Cusworth, D. H., D. J. Jacob, D. J. Varon, C. Chan Miller, X. Liu, K. Chance, A.K. Thorpe, R.M. Duren, C.E. Miller, D.R. Thompson, C. Frankenberg, L. Guanter, and C.A. Randles, Potential of next-generation imaging spectrometers to detect and quantify methane point sources from space, Atmos. Meas. Tech., https://doi.org/10.5194/amt-2019-202, in press, 2019.

4. Wang, H., A.H. Souri, G. Gonzalez Abad, X. Liu, and K. Chance, OMI Total Column Water Vapor Version 4 Validation and Applications, Atmos. Meas. Tech., 12, 5183–5199, https://doi.org/10.5194/amt-12-5183-2019, 2019.

5. Bak, J., K.-H. Baek, J.-H. Kim, X. Liu, J. Kim, and K. Chance, Cross-verification of simulated GEMS tropospheric ozone retrievals and ozonesonde measurements over Northeast Asia, Atmos. Meas. Tech., 12, 5201–5215, https://doi.org/10.5194/amt-12-5201-2019, 2019.

6. Yang, K. and X. Liu, Ozone profile climatology for remote sensing retrieval algorithms, Atmos. Meas. Tech., 12, 4745–4778, https://doi.org/10.5194/amt-12-4745-2019, 2019.

7. Gonzalez Abad, G., A. H. Souri, J. Bak, K. Chance, L. Flynn, N.A. Krotkov, L. Lamsal, C. Li, X. Liu, C. Chan Miller, C.R. Nowlana, R. Suleiman, H. Wang, Five decades observing Earth's atmosphere trace gases using ultraviolet and visible backscatter solar radiation from space, J. Quant. Spectr. Radiat. Transfer, https://doi.org/10.1016/j.jqsrt.2019.04.030, 2019.

8. Bak, J., X. Liu, K. Sun, K. Chance, and J.-H. Kim, Linearization of the effect of slit function changes for improving Ozone Monitoring Instrument ozone profile retrievals, Atmos. Meas. Tech., 12, 3777–3788, https://doi.org/10.5194/amt-12-3777-2019, 2019.

9. Shen, L., D. J., Jacob, X. Liu, G. Huang, K. Li, H. Liao, and T. Wang, An evaluation of the ability of the Ozone Monitoring Instrument (OMI) to observe boundary layer ozone pollution across China: application to 2005–2017 ozone trends, Atmos. Chem. Phys., 19, 6551-6560, https://doi.org/10.5194/acp-19-6551-2019, 2019.

10. Kim, J., et al., New Era of Air Quality Monitoring from Space: Geostationary Environment Monitoring Spectrometer (GEMS), Bull. Amer. Meteor. Soc., https://doi.org/10.1175/BAMS-D-18-0013.1, 2019.

11. Lu, X., L. Zhang, Y. Zhao, D.J. Jacob, Y. Hu, H. Lu, M. Gao, X. Liu, I. Petropavlovskikh, A. McClure-Begley, R. Querel, Surface and tropospheric ozone trends in the Southern Hemisphere since 1990: possible linkages to poleward expansion of the Hadley circulation, Sci. Bull., 64(6), 400-409, https://doi.org/10.1016/j.scib.2018.12.021, 2019.

12. Suleiman, R. M., K. Chance, X. Liu, G. González Abad, T.P. Kurosu, F. Hendrick, and N. Theys, OMI total bromine monoxide (OMBRO) data product: algorithm, retrieval and measurement comparisons, Atmos. Meas. Tech., 12, 2067–2084, https://doi.org/10.5194/amt-12-2067-2019, 2019.

13. Sun, K., L. Zhu, K. Cady-Pereira, C. Chan Miller, K. Chance, L. Clarisse, P.-F. Coheur, G. Gonzalez Abad, G. Huang, X. Liu, M. Van Damme, K. Yang, and M. Zondlo, A physics-based approach to oversample multi-satellite, multi-species observations to a common grid, Atmos. Meas. Tech., 11, 6679-6701, https://doi.org/10.5194/amt-11-6679-2018, 2018.

14. Nowlan, C.R., X. Liu, S.J. Janz, M. G. Kowalewski, K. Chance, M.B. Follette-Cook, A. Fried, G. González Abad, L.M. Judd, H.Kwon, J.R. Herman, C.P. Loughner, K.E. Pickering, E. Spinei, and A.J. Weinheimer, Nitrogen dioxide and formaldehyde measurements from the GEOstationary Coastal and Air Pollution Events (GEO-CAPE) Airborne Simulator over Houston, Texas, Atmos. Meas. Tech., 11, 5941-5964, https://doi.org/10.5194/amt-11-5941-2018, 2018.

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15. Fu, D., S.S. Kulawik, K. Miyazaki, K. Bowman, J.R. Worden, A. Eldering, N. J. Livesey, J. Teixeira, F. W. Irion, R. L. Herman, G. B. Osterman, X. Liu, P. F. Levelt, A.M. Thompson, and M. Luo, Retrievals of tropospheric ozone profiles from the synergism of AIRS and OMI: methodology and validation, Atmos. Meas. Tech., 11, 5587-5605, https://doi.org/10.5194/amt-11-5587-2018, 2018.

16. Sun, K., I.E. Gordon, C.E. Sioris, X. Liu, K. Chance, S.C. Wofsy, Reevaluating the use of O2 a1 Dg band in spaceborne remote sensing of greenhouse gases, Geophys. Res. Lett., 45., https://doi.org/10.1029/2018GL077823, 2018.

17. Johnson, M. S., X. Liu, P. Zoogman, J. Sullivan, M.J. Newchurch, S. Kuang, T. Leblanc, and T. McGee, Potential sources of a priori ozone profiles for TEMPO tropospheric ozone retrievals, Atmos. Meas. Tech., 11, 3457-3477, https://doi.org/10.5194/amt-11-3457-2018, 2018.

18. Gaudel, A., O. R. Cooper, G. Ancellet, B. Barret, A. Boynard, J. P. Burrows, C. Clerbaux, P.-F. Coheur, J. Cuesta, E. Cuevas, S. Doniki, G. Dufour, F. Ebojie, G. Foret, O. Garcia, M. J. Granados-Muñoz, J. Hannigan, F. Hase, B. Hassler, G. Huang, D. Hurtmans, D. Jaffe, N. Jones, P. Kalabokas, B. Kerridge, S. Kulawik, B. Latter, T. Leblanc, E. Le Flochmoën, W. Lin, J. Liu, X. Liu, E. Mahieu, A. McClure-Begley, J. L. Neu, M. Osman, M. Palm, H. Petetin, I. Petropavlovskikh, R. Querel, N. Rahpoe, A. Rozanov, M. G. Schultz, J. Schwab, R. Siddans, D. Smale, M. Steinbacher, H. Tanimoto, D. Tarasick, V. Thouret, A. M. Thompson, T. Trickl, E. Weatherhead, C. Wespes, H. Worden, C. Vigouroux, X. Xu, G. Zeng, J. Ziemke, Tropospheric Ozone Assessment Report: Present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation. Elem. Sci. Anth., 6(1), p39. doi: https://doi.org/10.1525/elementa.291, 2018.

19. Kim, M., J. Kim, O. Torres, C. Ahn, W. V. Kim, U. Jeong, S. Go, X. Liu, K. J. Moon, and D.R. Kim, Optimal Estimation-Based Algorithm to Retrieve Aerosol Optical Properties for GEMS Measurements Over Asia, Remote Sens., 10(2), 162; doi:10.3390/rs10020162, 2018.

20. Lu, X., L. Zhang, X. Liu, M. Gao, Y. Zhao, and J. Shao, Lower tropospheric ozone over India and its linkage to the South Asian monsoon, Atmos. Chem. Phys., 18, 3101-3118, https://doi.org/10.5194/acp-18-3101-2018, 2018.

21. Zhang, C., C. Liu, Y. Wang, S. Beirle, F. Si, H. Zhou, M. Zhao, W. Su, W. Zhang, K. L. Chan, X. Liu, T. Wagner, Preflight evaluation of the performance of Chinese Environmental trace gases Monitoring Instrument (EMI) by Spectral Analyses of Nitrogen Dioxide, IEEE Transaction on Geoscience and Remote Sensing, doi: 10.1109/TGRS.2018.2798038, 56 (6), 3323-3332, 2018.

22. Hayashida, S., M. Kajino, M. Deushi, T. T. Sekiyama, and X. Liu, Seasonality of the lower tropospheric ozone over central China observed by the Ozone Monitoring Instrument, Atmos. Environ., 184, 244-253, https://doi.org/10.1016/j.atmosenv.2018.04.014, 2018.

23. Hayashida, S., S. Kayaba, M. Deushi, K. Yamaji, A. Ono, M. Kajino, T.T. Sekiyama, T. Maki, X. Liu, Study on lower tropospheric ozone over central and eastern China: Comparison of satellite observation with model simulation, In: Vadrevu K., Ohara T., Justice C. (eds), Land-Atmospheric Research Applications in South and Southeast Asia. Springer Remote Sensing/Photogrammetry. Springer, Cham, https://doi.org/10.1007/978-3-319-67474-2_13.

24. Luo, J., L. L. Pan, S. B. Honomichl, J. W. Bergman, W. J. Randel, G. Francis, C. Clerbaux, M. George, X. Liu, and W. Tian, Space–time variability in UTLS chemical distribution in the Asian summer monsoon viewed by limb and nadir satellite sensors, Atmos. Chem. Phys.,

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18, 12511-12530, https://doi.org/10.5194/acp-18-12511-2018, 2018. 25. Levelt, P., Joiner, J., Tamminen, J., Veefkind, P., Bhartia, P. K., Stein Zweers, D., Duncan, B.

N., Streets, D. G., Eskes, H., van der A, R., McLinden, C., Fioletov, V., Carn, S., de Laat, J., DeLand, M., Marchenko, S., McPeters, R., Ziemke, J., Fu, D., Liu, X., Pickering, K., Apituley, A., Gonzáles Abad, G., Arola, A., Boersma, F., Chan Miller, C., Chance, K., de Graaf, M., Hakkarainen, J., Hassinen, S., Ialongo, I., Kleipool, Q., Krotkov, N., Li, C., Lamsal, L., Newman, P., Nowlan, C., Suileiman, R., Tilstra, L. G., Torres, O., Wang, H., and Wargan, K.: The Ozone Monitoring Instrument: overview of 14 years in space, Atmos. Chem. Phys., 18, 5699-5745, https://doi.org/10.5194/acp-18-5699-2018, 2018.

26. Huang, G, X. Liu, et al., Validation of 10-year SAO OMI Ozone Profile (PROFOZ) Product Using Aura MLS Measurements, Atmos. Meas. Tech., 11, 17-32, https://doi.org/10.5194/amt-11-17-2018, 2018.

27. Bak, J., X. Liu, J.-H. Kim, D.P. Haffner, K. Chance, K. Yang, and K. Sun, Characterization and Correction of OMPS Nadir Mapper Measurements for Ozone Profile Retrievals, Atmos. Meas. Tech., 10, 4373-4388, https://doi.org/10.5194/amt-10-4373-2017, 2017.

28. Hu, L., D.J. Jacob, X. Liu, Y. Zhang, L. Zhang, P.S. Kim, M.P. Sulprizio, R.M. Yantosca, Global budget of tropospheric ozone: evaluating recent model advances with satellite (OMI), aircraft (IAGOS), and ozonesonde observations, Atmos. Environ., 167, 323-334, https://doi.org/10.1016/j.atmosenv.2017.08.036, 2017.

29. Sun, K., X. Liu, G. Huang, G. González Abad, Z. Cai, K. Chance, and K. Yang， Deriving the slit functions from OMI solar observations and its implications for ozone-profile retrieval, Atmos. Meas. Tech., 10, 3677-3695, https://doi.org/10.5194/amt-10-3677-2017, 2017.

30. Huang, G, X. Liu, et al., Validation of 10-year SAO OMI Ozone Profile (PROFOZ) product using ozonesonde observations, Atmos. Meas. Tech., 10, 2455-2475, https://doi.org/10.5194/amt-10-2455-2017, 2017.

31. Carr, J., X. Liu, B. Baker, K. Chance, Observing Nightlights from Space with TEMPO, International Journal of Sustainable Lighting, 19, 26-35, 2017.

32. Choi, H.-D., Liu, H., Crawford, J. H., Considine, D. B., Allen, D. J., Duncan, B. N., Horowitz, L. W., Rodriguez, J. M., Strahan, S. E., Zhang, L., Liu, X., Damon, M. R., and Steenrod, S. D.: Global O3-CO Correlations in a Chemistry and Transport Model during July–August: Evaluation with TES Satellite Observations and Sensitivity to Input Meteorological Data and Emissions, Atmos. Chem. Phys., 17, 8429-8452, https://doi.org/10.5194/acp-17-8429-2017, 2017.

33. Sun, K., X. Liu, C.R. Nowlan, Z. Cai, K. Chance, C. Frankenberg, R. A. M. Lee, R. Pollock, R. Rosenberg, and D. Crisp, Characterization of the OCO-2 instrument line shape functions using on-orbit solar measurements, Atmos. Meas. Tech., 10, 939-953, https://doi.org/10.5194/amt-10-939-2017, 2017.

34. Kuang, S., et al., Summertime tropospheric ozone enhancement associated with a cold front passage due to stratosphere-to-troposphere transport and biomass burning: Simultaneous ground-based lidar and airborne measurements, J. Geophys. Res. Atmos., 122, doi:10.1002/2016JD026078, 2017.

35. Zoogman, P., X. Liu, et al., Tropospheric Emission: Monitoring of Pollution (TEMPO), J. Quant. Spectro. & Radiat. Transfer, 186, 17-39, doi:org/10.1016/j.jqsrt.2016.05.008, 2017.

36. Jacob, D. J., Turner, A. J., Maasakkers, J. D., Sheng, J., Sun, K., Liu, X., Chance, K., Aben, I., McKeever, J., and Frankenberg, C., Satellite observations of atmospheric methane and

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their value for quantifying methane emissions, Atmos. Chem. Phys., 16, 14371-14396, doi:10.5194/acp-16-14371-2016, 2016.

37. Orphal, J., et al., Absorption cross-sections of Ozone in the ultraviolet and visible spectral regions–Status report 2015, J. Mol. Spectrosc., 327, 105-121, doi:10.1016/j.jms.2016.07.007, 2016.

38. Wang, H., Gonzalez Abad, G., Liu, X., and Chance, K., Validation of OMI Total Column Water Vapor Product, Atmos. Chem. Phys., 16, 11379-11393, doi:10.5194/acp-16-11379-2016, 2016.

39. Zoogman, P., X. Liu, K. Chance, Q. Sun, C. Schaaf, T. Mahr, T. Wagner, A climatology of visible surface reflectance spectra, J. Quant. Spectro. & Radiat. Transfer, 180, 39-46, doi:10.1016/j.jqsrt.2016.04.003, 2016.

40. Jeong, U., J. Kim, C, Ahn, O. Torres, X. Liu, P.K. Bhartia, R.J.D. Spurr, D. Haffner, K. Chance, and B. N. Holben, An online aerosol retrieval algorithm using OMI near-UV observations based on the optimal estimation method, Atmos. Chem. Phys., 16, 177-193, doi:10.5194/acp-16-177-2016, 2016.

41. Bak, J., X. Liu, J.H. Kim, M.T. Deland, and K. Chance, Improvement of OMI ozone profile retrievals by simultaneously fitting polar mesospheric clouds, Atmos. Meas. Tech., 9, 4521-4531, doi:10.5194/amt-9-4521-2016, 2016.

42. Nowlan, C. R., X. Liu, J. W. Leitch, K. Chance, et al., Nitrogen dioxide observations from the Geostationary Trace gas and Aerosol Sensor Optimization (GeoTASO) airborne instrument: Retrieval algorithm and measurements during DISCOVER-AQ Texas 2013, Atmos. Meas. Tech., 9, 2647-2668, doi:10.5194/amt-9-2647-2016, 2016.

43. González Abad, G., A. Vasilkov, C. Seftor, X. Liu, and K. Chance: Smithsonian Astrophysical Observatory Ozone Mapping and Profiler Suite (SAO OMPS) formaldehyde retrieval, Smithsonian Astrophysical Observatory Ozone Mapping and Profiler Suite (SAO OMPS) formaldehyde retrieval, Atmos. Meas. Tech., 9, 2797-2812, doi:10.5194/amt-9-2797-2016, 2016.

44. Liu, C., X. Liu, M. G. Kowalewski, S.J. Janz, G. Gonzalez Abad, K.E. Pickering, K. Chance, L. N. Lamsal, Analysis of ACAM Data for Trace Gas Retrievals during the 2011 DISCOVER-AQ Campaign, J. Spectrosc., vol. 2015, 827160, doi:10.1155/2015/827160, 2015.

45. Xu, X., J. Wang, J. Zeng, R. Spurr, X. Liu, O. Dubovik, L. Li, Z. Li, M. I. Mishchenko, A. Siniuk, and B. N. Holben, Retrieval of aerosol microphysical properties from AERONET photopolarimetric measurements: 2. A new research algorithm and case demonstration. J. Geophys. Res. Atmos., 120, 7079–7098. doi: 10.1002/2015JD023113, 2015.

46. Hayashida, S., X. Liu, A. Ono, K. Yang, and K. Chance, Observation of ozone enhancement in the lower troposphere over East Asia from a space-borne ultraviolet spectrometer, Atmos. Chem. Phys., 15, 9865-9881, doi:10.5194/acp-15-9865-2015, 2015.

47. Liu, C., X. Liu, M.G. Kowalewski, S.J. Janz, G. Gonzalez Abad, K.E. Pickering, K. Chance, L. N. Lamsal, Characterization and Verification of ACAM Slit Functions for Trace Gas Retrievals during the 2011 DISCOVER-AQ Flight Campaign, Atmos. Meas. Tech., 8, 751-759, doi:10.5194/amt-8-751-2015, 2015.

48. Gonzalez Abad, G., X. Liu, K. Chance, H. Wang, R. Suleiman, Updated Smithsonian Astrophysical Observatory Ozone Monitoring Instrument (SAO OMI) formaldehyde retrieval, Atmos. Meas. Tech., 8, 19-32, doi:10.5194/amt-8-19-2015, 2015.

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49. Bak, J., Liu, X., Kim, J. H., Chance, K., and Haffner, D. P.: Validation of OMI total ozone retrievals from the SAO ozone profile algorithm and three operational algorithms with Brewer measurements, Atmos. Chem. Phys., 15, 667-683, doi:10.5194/acp-15-667-2015, 2015.

50. Wang, H., X. Liu, K. Chance, G. Gonzalez Abad, Water Vapor Retrieval from OMI Visible Spectra, Atmos. Meas. Tech., 7, 1901-1913, doi:10.5194/amt-7-1901-2014, 2014.

51. Miller, C.C., G. Gonzalez Abad, H. Wang, X. Liu, T. P. Kurosu, D. J. Jacob, and K. Chance, Glyoxal Retrieval from the Ozone Monitoring Instrument, Atmos. Meas. Tech., 7, 3891-3907, doi:10.5194/amt-7-3891-2014, 2014.

52. Hache, E., J.-L Attié, C. Tourneur, P. Ricaud, L. Coret, W.A. Lahoz, L. El Amraoui, B. Josse, P. Hamer, J. Warner, X. Liu, K. Chance, M. Höpfner, R. Spurr, V. Natraj, S. Kulawik, A. Eldering, and J. Orphal, The added value of a geostationary thermal infrared and visible instrument to monitor ozone for air quality, Atmos. Meas. Tech., 7, 2185-2201, doi:10.5194/amt-7-2185-2014, 2014.

53. Wang, J., X. Xu, S. Ding, R.J.D. Spurr, X. Liu, K. Chance, A numerical testbed for remote sensing of aerosols, and its demonstration for evaluating retrieval synergy from a geostationary satellite constellation of GEO-CAPE and GOES-R. J. Quant. Spectrosc. Radiat. Transfer, 146, 510-528, doi:10.1016/j.jqsrt.2014.03.020, 2014.

54. Ziemke, J. R., M. A. Olsen, J. C. Witte, A. R. Douglass, S. E. Strahan, K. Wargan, X. Liu, M. R. Schoeberl, K Yang, T. B. Kaplan, S. Pawson, B. N. Duncan, P. A. Newman, P.K. Bhartia, M. K. Heney, Assessment and applications of NASA ozone data products derived from Aura OMI/MLS satellite measurements in context of the GMI chemical transport model, J. Geophys. Res. Atmos., 119, doi:10.1002/2013JD020914, 2014.

55. Cai, Z.-N, Y. Liu, and X. Liu, Sensitivity studies for monitoring tropospheric ozone from space using the ultraviolet and visible and the polarization bands, Atmos. Oceanic Sci. Lett., 7, 198-202, doi:10. 3878/j.issn.1674-2834.13.0092, 2014.

56. Flynn, C, K.E. Pickering, J.H. Crawford, L. Lamsal, N. Krotkov, J. Herman, A. Weinheimer, G. Chen, X. Liu, J. Szykman, S.-C. Tsay, C. P. Loughner, J. Hains, P. Lee, R.R. Dickerson, J.W. Stehr, L. Brent, The Relationship between Column-density and Surface Mixing Ratio: Statistical Analysis of O3 and NO2 Data from the July 2011 Maryland DISCOVER-AQ Mission, Atmos. Environ., DOI: 10.1016/j.atmosenv.2014.04.041, 2014.

57. Zoogman, P., Jacob, D.J., Chance, K., Liu, X., Fiore, A., Lin, M., Travis, K., Monitoring high-ozone events in the US Intermountain West using TEMPO geostationary satellite observations, Atmos. Chem. Phys., 14, 6261-6271, doi:10.5194/acp-14-6261-2014, 2014.

58. Foret, G., M. Eremenko, J. Cuesta, P. Sellitto, J. Barré,B. Gaubert, A. Coman, G. Dufour, X. Liu, M. Joly, M. Beekmann, Ozone pollution: What can we see from space? A case study, J. Geophys. Res., doi: 10.1002/2013JD021340, 2014.

59. Fioletov., V.E., C.A. McLinden, N. Krotkov, K. Yang, D.G. Loyola, P. Valks, N. Theys, M. Van Roozaendael, C. Nowlan, K. Chance, X. Liu, C. Lee, R.V. Martin, Evaluation of the information in OMI, SCIAMACHY, and GOME-2 satellite SO2 retrievals to detect large emission sources, J. Geophys. Res., 118,11,399-11,418, doi:10.1002/jgrd.50826, 2013.

60. Kuang, S., M.J. Newchurch, J. Burris, X. Liu, Ground-based Lidar for Boundary Layer Ozone Measurements, Appl. Opt., 52(15), 3557-3566, doi:10.1364/ AO.52.003557.

61. Liu, C., X. Liu, K. Chance, The Impact of Using Different Ozone Cross Sections on Ozone Profile Retrievals from OMI UV Measurements, JQSRT, 10.1016/j.jqsrt.2013.06.006, 2013.

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62. Liu, G., J.J. Liu, D.W. Tarasick, V.E. Fioletov, J.J. Jin, O. Moeni, X. Liu, and C.E. Sioris, A global tropospheric ozone climatology from trajectory-mapped ozone soundings, Atmos. Chem. Phys., 13, 10659-10675, doi:10.5194/acp-13-10659-2013, 2013.

63. Kim, P.S., D.J. Jacob, X. Liu, J.X. Warner, K. Yang, and K. Chance, Global Ozone-CO Correlations from OMI and AIRS: Constraints on Tropospheric Ozone Sources, Atmos. Chem. Phys., 13, 9321-9335, doi:10.5194/acp-13-9321-2013, 2013.

64. Bak, J., X. Liu, J. C. Wei, L. L. Pan, K. Chance, and J. H. Kim, Improvement of OMI ozone profile retrievals in the upper troposphere and lower stratosphere by the use of a tropopause-based ozone profile climatology, Atmos. Meas. Tech., 6, 2239-2254, doi:10.5194/amt-6-2239-2013, 2013.

65. Cuesta, J., M. Eremenko, X. Liu, G. Dufour, Z. Cai, M. Höpfner, T. von Clarmann, P. Sellitto, G. Foret, B. Gaubert, M. Beekmann, J. Orphal, K. Chance, R. Spurr, and J.-M. Flaud Satellite observation of lowermost tropospheric ozone by multispectral synergism of IASI thermal infrared and GOME-2 ultraviolet measurements, Atmos. Chem. Phys., 13, 9675-9693, doi:10.5194/acp-13-9675-2013, 2013.

66. Huang, J., C. Zhou, X. Lee1, Y. Bao, X. Zhao, J. Fung, A. Richter, and X. Liu, Impact of anthropogenic emissions on seasonal changes in tropospheric nitrogen dioxide and ozone over East China, Atmos. Env., 77, 558-567, doi:10.1016/j.atmosenv.2013.05.030 2013.

67. Bak, J., J. H. Kim, X. Liu, K. Chance, and J. Kim, Evaluation of ozone profile and tropospheric ozone retrievals from GEMS and OMI spectra, Atmos. Meas. Tech., 6, 239-249, doi:10.5194/amt-6-239-2013, 2013.

68. Lal, S., S. Venkataramani, S. Srivastava, S. Gupta, C. Mallik, M. Naja, Y. Acharya, X. Liu, Transport effects on the vertical distribution of tropospheric ozone over the tropical marine regions surrounding India, J. Geophys. Res., doi: 10.1002/jgrd.50180, 2012.

69. Fu, D., J.R. Worden, X. Liu., S. S. Kulawik, K. W. Bowman, and V. Natraj, Characterization of ozone profiles derived from Aura TES and OMI Radiances, Atmos. Chem. Phys., 13, 3445-3462, doi:10.5194/acp-13-3445-2013, 2013.

70. Wang, L., MJ. Newchurch, A. Pour-Biazar, M. Khan, X. Liu, W. Koshak, and K. Chance, Estimating the Influence of Lightning on Upper Tropospheric Ozone Using NLDN Lightning Data and CMAQ model, Atmos. Envrion, 67, 219-228, doi: 10.1016/j.atmosenv.2012.11.001, 2013.

71. Bak, J., J. H. Kim, R. Spurr, X. Liu, and M. J. Newchurch, Sensitivity analysis of ozone retrievals from ultraviolet measurements on geostationary platforms, Remote Sensing of Environment, http://dx.doi.org/10.1016/j.rse.2011.11.010, 2012.

72. Fishman, J., J Al-Saadi, P Bontempi, K Chance, F Chavez, M Chin, P Coble, C Davis, P DiGiacomo, D Edwards, J Goes, J Herman, C Hu, Laura T Iraci, D Jacob, C Jordan, S R Kawa, R Key, X Liu, S Lohrenz, A Mannino, V Natraj, D Neil, J Neu, M Newchurch, K Pickering, J Salisbury, H Sosik, M Tzortziou, J Wang, M Wang, Progress Report on NASA's GEO-CAPE Mission: Fulfilling the Mandate and Meeting the Challenges of the Nation's Next Generation of Atmospheric Composition and Coastal Ecosystem Measurements, Bull. Amer. Meteor. Soc., 93, 1547-1566, 2012, doi:10.1175/BAMS-D-11-00201.1.

73. Liu, C., Y. Liu, X. Liu, K. Chance, Dynamical and Chemical Features of a Cutoff-Low over Northeast China in July 2007: Results from Satellite Measurements and Reanalysis, Advanced in Atmospheric Science, 30(2), 525-540, 2013.

74. Nakatani A., S. Kondo, S. Hayashida, T. Nagashima, K. Sudo, X. Liu, K. Chance, I. Hirota, Enhanced Mid-latitude Tropospheric Column Ozone over East Asia Associated with the

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Subtropical Jet, Journal of the Meteorological Society of Japan, 90(2), 207-222, doi: 10.2151/jmsj.2012-204.

75. Sellitto P., B. R. Bojkov, X. Liu, K. Chance and F. Del Frate, Tropospheric ozone column retrieval from the Ozone Monitoring Instrument by means of neural networks algorithms, Atmos. Meas. Tech., 4, 2375-2388, doi:10.5194/amt-4-2375-2011, 2011.

76. Cai, Z., Y. Liu, X. Liu, K. Chance, C.R. Nowlan, R. Lang, R. Munro, R. Suleiman, Characterization and Correction of Global Ozone Monitoring Experiment-2 Ultraviolet Measurements and Application to Ozone Profile Retrievals, J. Geophys. Res., 117, D07305, doi:10.1029/2011JD017096, 2012.

77. Nowlan C.R., X. Liu, K. Chance, Z. Cai, T.P. Kurosu, C. Lee, R.V. Martin, Retrievals of sulfur dioxide from GOME-2 using an optimal estimation approach: Algorithm and initial validation, J. Geophys. Res., 116, D18301, doi:10.1029/2011JD015808 2011.

78. Natraj V., X. Liu, S.S. Kulawik, K. Chance, R. Chatfield, D.P. Edwards, A. Eldering, G. Francis, T. Kurosu, K. Pickering, R. Spurr, H. Worden, Multispectral sensitivity studies for the retrieval of tropospheric and lowermost tropospheric ozone from simulated clear sky GEO-CAPE measurements, Atmos. Environ., 45, 7151-7165. doi:10.1016/j.atmosenv.2011.09.014, 2011.

79. Lahoz, W.A., V.-H. Peuch, J. Orphal, J.-L. Attie, K. Chance, X. Liu, D. Edwards, H. Elbern, J.-M. Flaud, M. Claeyman and L. El Amraoui, Monitoring air quality from space: The case for the geostationary platform, Bulletin of American Meteorological Society, doi: 10.1175/BAMS-D-11-00045.1, 2011.

80. Su, S., J.H. He, Y. Liu, Y. Wang, Z. Cai, X. Liu, Relationships between Low ozone and the Longitudinal Oscillation of the South Asia High over the Tibetan Plateau in Summer, Climatic and Environmental Reseach (Chinese), 16(1), 2011.

81. Zoogman, P., D.J. Jacob, K. Chance, L. Zhang, P. Le Sager, A.M. Fiore, A. Eldering, X. Liu, V. Natraj, S.S. Kulawik, Ozone Air Quality Measurement Requirements for a Geostationary Satellite Mission. Atmos. Environ., 45, 7143-7150, doi:10.1016/j.atmosenv.2011.05.058, 2011.

82. Biazar, A. M. khan , l. wang , Y.H. Park , M.J. Newchurch , D. McNider , X. Liu , D. Byun , R. Cameron, Utilization of Satellite Observation of Ozone and Aerosols in Providing Initial and Boundary Condition for Regional Air Quality Studies, J. Geophys. Res, D18309, doi:10.1029/2010JD015200, 2011.

83. Wang, L., M.J. Newchurch, A.P. Biazoor, X. Liu, S. Kuang, M. Khan, Evaluating AURA/OMI ozone profile retrievals using ozonesonde data and EPA surface measurements for August 2006, Atmos. Environ., 45, 5523-5530, 2011.

84. Claeyman, M., Attié, J.-L., Peuch, V.-H., El Amraoui, L., Lahoz, W. A., Josse, B., Ricaud, P., von Clarmann, T., Höpfner, M., Orphal, J., Flaud, J.-M., Edwards, D. P., Chance, K., Liu, X., Pasternak, F., and Cantié, R., A geostationary thermal infrared sensor to monitor the lowermost troposphere: O3 and CO retrieval studies, Atmos. Meas. Tech., 4, 297-317, doi:10.5194/amt-4-297-2011, 2011.

85. Salawitch, R. J. et al. (2010), A New Interpretation of Total Column BrO during Arctic Spring, Geophys. Res. Lett., 37, L21805, doi:10.1029/2010GL043798, 2010.

86. Yang, K., X. Liu, P. K. Bhartia, N. A. Krotkov, S. A. Carn, E. J. Hughes, A. J. Krueger, R. J. D. Spurr, and S. G. Trahan, Direct retrieval of sulfur dioxide amount and altitude from spaceborne hyperspectral UV measurements: Theory and application, J. Geophys. Res., 115, D00L09, doi:10.1029/2010JD013982, 2010.

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87. Walker, T.W., R. V. Martin, A. van Donkelaar, W. R. Leaitch, A.M. MacDonald, K. Anlauf, R. C. Cohen, G. Huey, M. Avery, A. Weinheimer, F. Flocke, D. Tarasick, A. Thompson, D. G. Streets, and X. Liu, Trans-pacific transport of reactive nitrogen and ozone to Canada during spring, Atmos. Chem. Phys., 10, 8353-8372, doi:10.5194/acp-10-8353-2010, 2010.

88. Zhang, L., D.J. Jacob, X. Liu, J.A. Logan, K. Chance, A. Eldering, and B.R. Bojkov, Intercomparison methods for satellite measurements of atmospheric composition: application to tropospheric ozone from TES and OMI, Atmos. Chem Phys., 10, 4725-4739, doi:10.5194/acp-10-4725-2010, 2010.

89. Liu, X., P. K. Bhartia, K. Chance, R. J. D. Spurr, T. P. Kurosu, Ozone profile retrievals from the Ozone Monitoring Instrument, Atmos. Chem. Phys., 10, 2521-2537, 2010.

90. Liu, X., P. K. Bhartia, K. Chance, L. Froidevaux, R. J. D. Spurr, T. P. Kurosu, Validation of OMI ozone profiles and stratospheric ozone columns with Microwave Limb Sounder measurements, Atmos. Chem. Phys., 9, 2539-2549, 2010.

91. Tarasick, D. W., J. J. Jin, V. E. Fioletov, G. Liu, A. M. Thompson, S. J. Oltmans, J. Liu, C. E. Sioris, X. Liu, O. R. Cooper, T. Dann, and V. Thouret , High-resolution tropospheric ozone fields for INTEX and ARCTAS from IONS ozonesondes, J. Geophys. Res., 115, D20301, doi:10.1029/2009JD012918, 2010.

92. Liu, C., Y. Liu, Z. Cai, S. Gao, J. Bian, X. Liu, and Kelly Chance, Dynamic formation of extreme ozone minimum events over the Tibetan Plateau during northern winters 1987–2001, J. Geophys. Res., 115, D18311, doi:10.1029/2009JD013130, 2010.

93. Pittman, J.V., L.L. Pan, J.C. Wei, F.W. Irion, X. Liu, E.S. Maddy, C.D. Barnet, K. Chance, R.S. Gao, Evaluation of AIRS, IASI, and OMI ozone profile retrievals in the extratropical tropopause region using in situ aircraft measurements, J. Geophys. Res., 114, D24109, doi:10.1029/2009JD012493, 2009.

94. Yang, K., X. Liu, N.A. Krotkov, A.J. Krueger, S.A. Carn, Estimating the altitude of volcanic sulfur dioxide plumes from space borne hyper-spectral UV measurements, Geophys. Res. Lett., 36, L10803, doi:10.1029/2009GL038025, 2009.

95. Liu, Y., Y. Wang, X. Liu, Cai, Z., and K. Chance, Tibetan middle tropospheric ozone minimum in June discovered from GOME, Geophys. Res. Lett., 36, L05814, doi:10.1029/2008GL037056, 2009.

96. Hayashida, S., N. Urita, K.Noguchi, X. Liu, and K.Chance, Spatiotemporal variation in tropospheric column ozone over East Asia observed by GOME and ozonesondes, Scientific Online Letters on the Atmosphere, 4, 117‒120, doi:10.2151/sola.2008‒030.

97. Cai, Z., Y. Wang, X. Liu, X. Zheng, K. Chance, Y. Liu, Validation of GOME ozone profiles and tropospheric column ozone with ozonesonde over China, Chinese J. Appl. Meteorol. Sc., 20 (3), 337-345, 2009.

98. Kaminski, J. W., L. Neary, J. Struzewska, J. C. McConnell, A. Lupu, J. Jarosz, K. Toyota, S. L. Gong, J. Côté, X. Liu, K. Chance, and A. Richter, GEM-AQ, an on-line global multiscale chemical weather system: model description and evaluation of gas phase chemistry processes, Atmos. Chem. Phys., 8, 3255-3281, 2008.

99. Says-Lopez, A., K. Chance, X. Liu, T.P. Kurosu and S.P. Sander, First observations of iodine oxide from space, Geophys. Res. Lett., 34(12), L12812, doi:10.1029/2007GL030111, 2007.

100. Liu, X., K. Chance, C.E. Sioris, and T.P Kurosu, Impact of using different ozone cross sections on ozone profile retrievals from GOME ultraviolet measurements, Atmos. Chem. Phys., 7, 3571-3578, 2007.

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101. Liu, X., K. Chance, T.P. Kurosu, Improved ozone profile retrievals from GOME data with degradation correction in reflectance, Atmos. Chem. Phys., 7, 1575-1583, 2007.

102. Noguch, K., N. Urita, S. Hayashida, X. Liu, and K. Chance, Validation and comparison of tropospheric column ozone derived from satellite measurements over Japan, Scientific Online Letters on the Atmosphere, 3, 041-044, doi:10.2151/sola.2007-011, 2007.

103. Sauvage, B., R.V. Martin, A. van Donkelaar, X. Liu, L. Jaegle, P.I. Palmer, and K. Chance, Remote sensed and in situ constraints on processes affecting tropical tropospheric ozone, Atmos. Chem. Phys., 7, 815-838, 2007.

104. Worden, J., X. Liu, K. Bowman, K. Chance, R. Beer, A. Eldering, M. Gunson, H. Worden, Improved tropospheric ozone profile retrievals using OMI and TES radiances, Geophys. Res. Lett., 34(1), L01809, 10.1029/2006GL027806, 2007.

105. Meijer,Y. J., D. P. J. Swart, R. J. van der A, F. Baier, P. K. Bhartia, G. E. Bodeker, K. Chance, T. Erbertseder, L. E. Flynn, F. del Frate, S. Godin-Beekmann, G. Hansen, O. P. Hasekamp, A. Kaifel, H. M. Kelder, B. J. Kerridge, J.-C. Lambert, J. Landgraf, X. Liu, I. S. McDermid, M. D. Müller, R. F. van Oss, Y. Pachepsky, V. Rozanov, R. Siddans, S. Tellmann, M. Weber, and C. Zehner, Evaluation of nine different GOME ozone profile algorithms, J. Geophys. Res., 111 (D21), D21306, 10.1029/2005JD006778, 2006.

106. Liu, X., K. Chance, C.E. Sioris, T.P. Kurosu, M.J. Newchurch, Intercomparison of GOME, ozonesonde, and SAGE-II measurements of ozone: Demonstration of the need to homogenize available ozonesonde datasets, J. Geophys. Res., 101(D14), D114305,10.1029/2005JD006718, 2006.

107. Sioris, C.E., L.J. Kovalenko, C.A. McLinden, R.J. Salawitch, M.Van Roozendael, F. Goutail, M. Dorf, K. Pfeilsticker, K. Chance, C. von Savigny, X. Liu, J.P. Pommereau, and J. Frerick, Latitudinal and vertical distribution of bromine monoxide and inorganic BrO in the lower stratosphere from SCIAMACHY limb scatter measurements, J. Geophys. Res., 101(D14), D14301, 10.1029/2005JD006479, 2006, 2006.

108. Liu, X., K. Chance, C.E. Sioris, M.J. Newchurch, T.P. Kurosu, Tropospheric ozone profiles from a ground-based ultraviolet spectrometer: a new retrieval method, Appl. Opt., 45(10), 2352-2359, 2006.

109. Liu X., K. Chance, C.E. Sioris, T.P. Kurosu, R.J.D. Spurr, R.V. Martin, M. Fu, J.A. Logan, D.J. Jacob, P.I. Palmer, M.J. Newchurch, I. Megretskaia, R. Chatfield, First directly-retrieved global distribution of tropospheric column ozone: comparison with the GOES-CHEM model, J. Geophys. Res., 111(D2), D02308, 10.1029/2005JD006564, 2006.

110. Liu, X., K. Chance, C.E. Sioris, R.J.D. Spurr, T.P. Kurosu, R.V. Martin, M.J. Newchurch, Ozone profile and tropospheric ozone retrieval from GOME: Algorithm description and validation, J. Geophys. Res., 110(D20), D20307, 10.1029/2005 JD006240, 2005.

111. Liu, X., C.E. Sioris, K.V. Chance, T.P. Kurosu, M.J. Newchurch, R.V. Martin, P.I. Palmer, Mapping tropospheric ozone profiles from an airborne UV/Visible spectrometer, Appl. Opt., 44(16), 3312-3319, 2005.

112. Liu, X., M.J. Newchurch, R. Loughman, and P.K. Bhartia, Errors resulting from assuming opaque Lambertian cloud surfaces in TOMS ozone retrieval, J. Quant. Spectro. & Radiat. Transfer, 85, 337-365, 2004.

113. Liu, X., J. Wang, and S.A. Christopher, Shortwave direct radiative forcing of dust aerosols over the Atlantic Ocean, Int. J. Rem. Sensing, 24, 5147-5160, 2003.

114. Liu, X., M.J. Newchurch, and J.H. Kim, Occurrence of ozone anomalies over cloudy areas in TOMS data, Atmos. Chem. and Phys., 3, 1113-1129, 2003.

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115. Wang, J., X. Liu, S.A. Christopher, J.S. Reid, E. Reid, and H. Maring, The Effect of Non-Sphericity on GOES-8 Dust Aerosol Retrievals during PRIDE, Geophys. Res. Lett., 30(24), 229310.1029/2003GL018697, 2003.

116. Newchurch, M.J., D. Sun, J.H. Kim, X. Liu, Tropical tropospheric ozone derived using Clear-Cloudy Pairs (CCP) of TOMS measurements, Atmos. Chem. and Phys., 3, 683-695, 2003.

117. Newchurch, M.J., X. Liu, J.H. Kim, and P.K. Bhartia, On the accuracy of TOMS retrievals over tropical cloudy regions, J. Geophys. Res., 106, 32,315-3227, 2001.

118. Newchurch, M.J., X. Liu, and J.H. Kim, Lower tropospheric ozone derived from TOMS near mountainous regions, J. Geophys. Res., 106, 23,403-20,412, 2001.

Thesis Liu, X., Ozone retrieval errors associated with clouds in Total Ozone Mapping Spectrometer (TOMS) data, Ph.D. Dissertation, University of Alabama in Huntsville, 2002. Conference Proceedings 1. Chance, K., X. Liu, C. Chan Miller, G.González Abad, G. Huang, C. Nowlan, A. Souri, R.

Suleiman, K. Sun, H. Wang, L. Zhu, P. Zoogman, J. Al-Saadi, J.-C. Antuña-Marrero, J. Carr, R. Chatfield, M. Chin, R. Cohen, D. Edwards, J. Fishman, D. Flittner, J. Geddes, M. Grutter, J.R. Herman, D.J. Jacob, S. Janz J. Joiner, J. Kim, N.A. Krotkov, B. Lefer, R.V. Martin, O.L. Mayol-Bracero, A. Naeger, M. Newchurch, G.G. Pfister, K. Pickering, R.B. Pierce, C. Rivera Cárdenas, A. Saiz-Lopez, W. Simpson, E. Spinei, R.J.D. Spurr, J.J. Szykman, O. Torres, and J. Wang, TEMPO Green Paper: Chemistry, physics, and meteorology experiments with the Tropospheric Emissions: Monitoring of Pollution instrument, Proc. SPIE, Vol. 11151, Sensors, Systems, and Next-Generation Satellites XXIII, 2019.

2. Dennis Nicks, Brian Baker, James Lasnik, Thomas Delker, James Howell, Kelly Chance, Xiong Liu, David Flittner, Jhoon Kim, Hyperspectral remote sensing of air pollution from geosynchronous orbit with GEMS and TEMPO, Proc. SPIE 10781, Earth Observing Missions and Sensors: Development, Implementation, and Characterization V, 107810T, doi:10.1117/12.2324781, 2018.

3. Leitch, J.W., T. Delker, W. Good, L. Ruppert, F. Murcray, K. Chance, X. Liu, C. Nowlan, S. J. Janz, N. A. Krotkov, K. E. Pickering, M. Kowalewski, J. Wang, "The GeoTASO airborne spectrometer project," Proc. SPIE 9218, Earth Observing Systems XIX, 92181H, doi: 10.1117/12.206376, 2014.

4. Chance, K., X. Liu, R.M. Suleiman, D.E. Flittner, J. Al-Saadi, and S.J. Janz, Tropospheric emissions: Monitoring of pollution (TEMPO), Proc. SPIE, Vol. 8866, Earth Observing Systems XVIII, Paper 88660D, doi:10.1117/12.2024479, 2013.

5. Liu, X., K. Chance, T.P. Kurosu, An eight-year record of ozone profiles and tropospheric column ozone from GOME, Proc. 2007 Envisat Symposium, https://earth.esa.int/workshops/ envisatsymposium/proceedings/sessions/3A4/507878li.pdf

6. Liu, X., K. Chance, C.E. Sioris, R.J.D. Spurr, T.P. Kurosu, R.V. Martin, M.J. Newchurch, and P.K. Bhartia, Ozone profiles and tropospheric ozone from the Global Ozone Monitoring Experiment, Proc. 2004 Envisat Symposium, http://earth.esa.int/workshops/salzburg04/ papers_posters/4C3_liu_560.pdf.

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7. Chance, K.V., X. Liu, R.J.D. Spurr, T.P. Kurosu, C.E. Sioris, and M.J. Newchurch, P.K. Bhartia, Ozone profile retrieval from Global Ozone Monitoring Experiment (GOME), Proceedings of the XX Quadrennial Ozone Symposium, 1, 483-484, Kos, Greece, 2004.

8. Liu, X., C.E. Sioris, K.V. Chance, T.P. Kurosu, M.J. Newchurch, R.V. Martin, P.I. Palmer, Tropospheric ozone profile retrievals from an airborne UV/Visible Spectrometer, Proceedings of the XX Quadrennial Ozone Symposium, 1, 573-574, Kos, Greece, 2004.

Past, Current and Pending Funding (11 PIs, 17 Co-Is)

1. Co-investigator (PI: Kelly Chance), SAO participation in the Korean Geostationary Environment Monitoring Spectrometer (GEMS): Algorithm improvements, in-flight characterization, and validation, NNH18ZDA001N-ESUSPI, 1.1.2019-12.31.2023.

2. SAO Principal Investigator, Path to SRR for MethaneSAT, funded by Environmental Defense Fund, 5.01.2018-08.31.2018.

3. SAO Principal Investigator, Phase A1 Study for MethaneSat, Satellite to Measure Emissions of CH4 from Gas and Oil Production Regions, funded by Environmental Defense Fund, 1.30.2018-12.31.2018.

4. Co-Investigator (PI: Gonzalo Gaonzalez Abad), Development of Long-term ESDRs of Ozone Profiles, BrO, and H2CO from GOME, SCIAMACHY, OMI, and GOME-2A UV Measurements, NNH12ZDA001N-MEASURES.

5. Principal investigator, Improving the Retrieval Accuracy and Long-term Consistency of Ozone profile and Tropospheric Ozone Measurements from the OMI on EOS Aura, ROSE2016 NRA NNH16ZDA001N-ACMAP, 2.17.2017-2.16.2020.

6. Co-investigator (PI: Dr. Kelly Chance), Aura Science Team: Analysis and Applications of Satellite Remote Sensing Measurements by the Smithsonian Astrophysical Observatory, ROSE2016 NRA NNH16ZDA001N-ACMAP, 2.17.2017-2.16.2020.

7. Co-investigator (PI: Dr. Caroline Nowlan), Retrieval of Ozone Profile and Trace Gases from GEO-TASO UV and Visible Measurements, funded by the GEOCAPE project, February-December, 2016.

8. Co-investigator (PI: Dr. Scott Janz), GeoTASO Measurements of Aerosols and Tropospheric NO2, O3, CH2O, and SO2 Vertical Column Density (VCD) in support of KORUS-AQ, NNH15ZDA001N-KORUS: KORUS-AQ: An International Cooperative Air Quality Field Study in Korea, 8.2016-8.2019.

9. Principal investigator, Retrieval of Ozone Profile and Trace Gases from GEO-TASO UV and Visible Measurements, funded by the GEOCAPE project, February-December, 2015.

10. Co-investigator (PI: Dr. Kelly Chance), Smithsonian Astrophysical Observatory (SAO) Membership in the S5P Validation Team, accepted (no funding), 2014.

11. Co-investigator (PI: Dr. Gonzalez Abad), Measurements of trace gases in the Panama Isthmus, 2014 Smithsonian Grand Challenges Awards, funded.

12. Principal investigator, Advanced ozone profile and tropospheric ozone retrievals from OMI measurements on the EOS-Aura, ROSES 20103NNH13ZDA001N-AURAST, 3.2014-2.2017, funded.

13. Co-investigator (PI: Dr. Kelly Chance), Aura Science Team: Analysis and Applications of Satellite Remote Sensing Measurements by the Smithsonian Astrophysical Observatory, ROSES 2013 NNH13ZDA001N-AURAST, 3.2014-2.2017, funded.

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14. Deputy-PI (PI: Kelly Chance), Tropospheric Emissions: Monitoring of Pollution (TEMPO), NNH12ZDA006O-EVI1: Earth Venture Instrument - 1, 4.2013-3.2020.

15. Co-investigator (PI: Kelly Chance), SAO Participation in the Korean Geostationary Environment Monitoring Spectrometer (GEMS): Instrument Design and Algorithm Development, NNH12ZDA001N-ESUSPI, 1.2013-12.2017.

16. Principal investigator, Retrievals of Tropospheric Ozone Profiles and HCHO from ACAM Measurements for the DISCOVER-AQ Project, NASA GSFC, 7.2012-5.2014.

17. Co-investigator (PI: Dr. Kelly Chance), SAO Membership in the OCO-2 Science Team, NNH11ZDA001N-OCO2: Science Team for the OCO-2 Mission, 2012-2014.

18. Principal investigator, Advanced ozone profile and tropospheric ozone retrievals from OMI measurements on the EOS-Aura, ROSES 2010 NNH10ZDA001N-AURA, 5.2011-4.2014.

19. Principal investigator, Retrievals of Tropospheric Ozone Profiles and HCHO from ACAM Measurements for the DISCOVER-AQ Project, NASA GSFC, 6.2011-5.2012.

20. Co-investigator, Ozone and trace gas retrieval sensitivity, Tropospheric ozone retrievals from GOME-2 UV/Visible measurements, funded by GEOCAPE project, 2011.

21. Co-investigator (PI: Dr. Kelly Chance), Analysis and Applications of Satellite Remote Sensing Measurements by the Smithsonian Astrophysical Observatory, ROSES 2010 NNH10ZDA001N-AURA, 5.2011-4.2014.

22. Co-investigator (PI: Dr. James Leitch at Ball Aerospace), A Prototype Sensor for Aerosol and Trace Gas Retrieval Readiness and Airborne Validation to Support the GEO-CAPE Mission, ROSES 2010 IIP, 6.2011-5.2014.

23. Principal investigator, Retrieval and Assimilation Studies: Ozone Profile Retrievals from OMI and Its Synergy with AIRS/TES, GEOS-5 Assimilation of OMI Retrievals and Boundary Layer/Tropospheric Ozone Retrieval Sensitivity for GEO-CAPE, funded by NASA GSFC, 5.2010-5.2011.

24. Principal Investigator, Investigate the global distribution of tropospheric ozone measured by the OMI and GOME-2 instruments using the GMI chemistry transport model, NASA ROSES2009 ACMAP, 3.2010-2.2013.

25. Co-Investigator (PI, Dr. Jun Wang), AERONET skylight retrievals using polarimetric measurements: toward physically consistent validation of APS aerosol products, NASA ROSES2009 GLORY Science Team, 2011-2013.

26. Co-Investigator (PI, Dr. Kelly Chance), SAO Membership in the NPP Science Team: Tropospheric Ozone, Trace Gases, and Development of Climate Data Records, 03/03/2008-03/02/2011.

27. Principal Investigator, Quantification of atmospheric processes controlling tropospheric ozone: observations of tropospheric ozone from OMI, GOME, and TES in conjunction with a global 3-D tropospheric chemistry and transport model, NASA New Investigator Program in Sun-Earth System Science, 01.01.2008- 12.31.2009.

28. Co-Investigator (PI, Dr. Kelly Chance), Implementation and assessment of ozone profiling and tropospheric ozone measurements for the OMI on EOS AURA, 07.01.2006-06.30.2009.

Presentations, posters and invited seminars (first author or presenter) • Liu, X., J. Bak, C. Chan Miller, K. Chance, Improvements of tropospheric ozone profile

retrievals with Joint UV/Visible Measurements: GOME-2 and TEMPO, 2019 Joint Satellite Conference, Boston, MA, Sep 30-Oct 4, 2019.

15

• Liu, X., et al., TEMPO level 1b: Calibration changes and expected performance, Geostationary conference, Cambridge, MA, September 26-27, 2019.

• Liu, X., et al., TEMPO ozone profile algorithm, TEMPO Science Team Meeting, Madison, WI, June 5-6, 2019.

• Liu, X., J. Bak, R. Spurr, K. Chance, PCA-VLIDORT: Application to OMI UV ozone profile retrievals, AGU Fall Meeting, Washington D.C., December 10-14, 2018.

• Liu, X., Ozone Profile and Tropospheric Ozone Retrievals from Backscattered Measurements: OMI and beyond, Hyperspectral Imaging and Sounding of the Environment (HISE), OSA Light, Energy and the Environment Congress, Singapore, November, 2018 (Invited).

• Liu, X., et al., TEMPO Products Overview, Western U.S. TEMPO Early Adopters Workshop, Fort Collins, CO, April 9-10, 2018.

• Liu, X., et al., TEMPO L0-L1 processor, TEMPO Science Team Meeting, Boulder, CO, June 6-7, 2018.

• Liu, X., et al., TEMPO ozone profile algorithm, TEMPO Science Team Meeting, Boulder, CO, June 6-7, 2018.

• Liu, X., J. Bak, G. Huang, G. Gonzalez Abad, K. Chance, K. Yang and C. R Nowlan, Improving the Retrieval Accuracy and Long-term Consistency of Ozone Profile and Tropospheric Ozone Measurements from the OMI on EOS Aura, AGU fall meeting 2017, New Orleans, LA.

• J. Bak, Liu, X.*, G. Huang, G. Gonzalez Abad, K. Chance, K. Yang and C. R Nowlan, Improving the Retrieval Accuracy and Long-term Consistency of Ozone Profile and Tropospheric Ozone Measurements from the OMI on EOS Aura, OMI Science Team Meeting, Greenbelt, MD, 2017.

• Liu, X., J. Houck, Kelly Chance et al., TEMPO L0-L1 processor, TEMPO Science Team Meeting, Cambridge, MA, May 31, 2017.

• Sun, K., X. Liu*, Z. Cai, G. Huang, G. González Abad, and K. Chance, Deriving the Instrument Transfer Function from OMI Solar Observations and Its Implications for Ozone Retrievals, GSICS Annual Meeting, Madison, Wisconsin, 2017.

• Liu, X., Ozone Profile and Tropospheric Ozone Retrievals from Backscattered Measurements: OMI and beyond, Harvard University, February 10, 2017 (Invited).

• Liu, X., P. Zoogman, K. Chance, Z. Cai, C.R. Nowlan, G. Gonzalez Abad, G. Huang, GOME-2 Tropospheric Ozone Profile Retrievals from Joint UV/Visible Measurements, AGU 2016 Fall Meeting, San Francisco, A41A-0026, December 12-16, 2016.

• Liu, X., TEMPO L0-L1 processor, 7th GEMS Science Team Meeting, Seoul, South Korea. • Liu, X., K. Chance, D.F. Flittner, J. Al-Saadi, Assess the Impacts of Dark Current on Trace

Gas Retrievals and the Overall Retrieval Performance, 5th TEMPO Science Team Meeting, Washington D.C., June 1-2, 2016.

• Liu, X., P. Zoogman, K. Chance, and Z. Cai, C.R. Nowlan, Improvement of GOME-2 Tropospheric Ozone Profile Retrievals from Joint UV/Visible Measurements, ESA-LPS, Prague, Czech Republic, May 9-13, 2016.

• Liu, X, K. Chance, R.M. Suleiman, D. E. Flittner, J.A. Al-Saadi, S.J. Janz, and the TEMPO team, Implementation of Tropospheric Emissions: Monitoring of Pollution (TEMPO), Light, Energy, and the Environment Congress, Suzhou, China, November 2-5, 2015. (Invited)

16

• Liu, X., P. Zoogman, K. Chance, and Z. Cai, C.R. Nowlan, Improvement of GOME-2 Tropospheric Ozone Profile Retrievals from Joint UV/Visible Measurements, AGU 2015 Fall Meeting, San Francisco, December 14-18, 2015.

• Liu, X., G. Huang, K. Chance, K. Yang, P.K. Bhartia, Validation of 10 Years of SAO OMI Ozone Profile Product with Ozonesonde and MLS Observations, OMI Science Team Meeting, De Bilt, The Netherlands, August 31-September 2, 2015.

• Chance, K. X. Liu*, et al., Tropospheric Emissions: Monitoring of Pollution (TEMPO), Overview, OMI Science Team Meeting, De Bilt, The Netherlands, August 31-September 2, 2015.

• Liu, X., K. Chance, D.E., Flittner, J. A. Al-saadi, The Impacts of Enhanced Dark Current on Science Performance, Boulder, CO, TEMPO Critical Design Review, June 24-25, 2015.

• Liu, X., P. Zoogman, K. Chance, and C.R. Nowlan, Towards the Demonstration of TEMPO UV/Visible Tropospheric Ozone Retrievals using GOME-2 Data, TEMPO Science Team Meeting, Huntsville, AL, May 27-28, 2015.

• Nowlan, C.R., Liu, X.*, C. Liu, G. González Abad, K. Chance, J. Leitch, J. Cole, T. Delker, B. Good, F. Murcray, L. Ruppert, D. Soo, C. Loughner, M. Follette-Cook, S. Janz, M. Kowalewski, K. Pickering, Trace Gas Retrievals from the GeoTASO Aircraft Instrument during DISCOVER-AQ, TEMPO Science Team Meeting, Huntsville, AL, May 27-28, 2015.

• Janz, S.J., M.G. Kowalewski, S. Xiong, K. McCullough, N. Krotkov, L. Lamsal, X. Liu*, C. Liu, C.R. Nowlan, ACAM/GCAS Measurements of NO2, CH2O, and O3 during Discover-A, TEMPO Science Team Meeting, Huntsville, AL, May 27-28, 2015.

• Liu, X., C. Liu, C.R. Nowlan, M.G. Kowalewski, S.J. Janz, G. González Abad, C. Loughner, K.E. Pickering, K. Chance, Retrievals and Validation of Trace Gases from ACAM during the DISCOVER-AQ Washington D.C.-Baltimore Campaign, Joint FRAPPE/DISCOVER-AQ Science Team Meeting, Boulder, CO, May 4-8, 2015.

• Nowlan, C.R., Liu, X.*, C. Liu, G. González Abad, K. Chance, J. Leitch, J. Cole, T. Delker, B. Good, F. Murcray, L. Ruppert, D. Soo, C. Loughner, M. Follette-Cook, S. Janz, M. Kowalewski, K. Pickering, Trace Gas Retrievals from the GeoTASO Aircraft Instrument during DISCOVER-AQ, Joint FRAPPE/DISCOVER-AQ Science Team Meeting, Boulder, CO, May 4-8, 2015.

• Liu, X., P. Zoogman, K. Chance, and C.R. Nowlan, Towards the Demonstration of TEMPO (Tropospheric Emission: Monitoring of Pollution) UV/Visible Tropospheric Ozone Retrievals using GOME-2, TOAR workshop, Madrid, Spain, April 28-30, 2015.

• Chance, K. X. Liu*, et al., Implementation of Tropospheric Emissions: Monitoring of Pollution (TEMPO), Hyperspectral Imaging and Sounding of the Environment (HISE) 2015, March 04, 2015. (Invited)

• Hou, W., J. Wang, X. Xu, X. Liu*, K. Chance, An algorithm for simultaneous inversion of aerosol properties and surface reflectance from airborne GeoTASO hyperspectral data, Hyperspectral Imaging and Sounding of the Environment (HISE) 2015, March 03, 2015.

• Liu X., K. Chance, C. Liu, C.R. Nowlan, Slit function and wavelength calibration for TEMPO, 5th GEMS workshop, Seoul, South Korea, October 7-10, 2014.

• Liu, X., P. Zoogman, K. Chance, and C.R. Nowlan, Ozone Profile Retrievals from UV/Visible Measurements, A51A-3014, AGU 2014 Fall Meeting, San Francisco, December 19, 2014.

17

• Hayashida, S., X. Liu*, A. Ono, K. Yang, and K. Chance, Tropospheric ozone climatology derived from ozonesonde, airborne and space borne measurements over East Asia, 5th GEMS workshop, Seoul, South Korea, October 7-10, 2014.

• Liu X., An introduction to optimal estimation and its application to ozone profile retrievals from satellite UV measurements, 5th GEMS Science Team Meeting, Seoul, South Korea, October 7-10, 2014.

• Liu, X., J. Bak, M.T. Deland, J.H. Kim, K. Chance, Simultaneous Retrievals of Polar Mesospheric Clouds with Ozone from OMI UV Measurements, AURA science team meeting, College Park, Maryland, September 15-18, 2014.

• Kelly Chance, Xiong Liu*, Raid Suleiman, Dave Flittner, Jay-Alsaadi, Scott Janz, the TEMPO Science Team, Status of the first NASA EV-I Project, TEMPO, OMI Science Team Meeting, De Bilt, Netherlands, March 11-13, 2014.

• Liu, X., J. Bak, K. Yang, S. Haiyashida, A. Ono, K. Chance, P.K. Bhartia, Ozone profile retrievals from OMI: updates, validation, and data analysis, OMI Science Team Meeting, De Bilt, Netherlands, March 11-13, 2014.

• Liu, X., C. Liu, M.G. Kowalewski, S.J. Janz, G. González Abad, K.E. Pickering, C.P. Loughner, K. Chance, L.N. Lamsal, J. Crawford, ACAM Trace Gas Retrievals and Validation During the 2011 DISCOVER-AQ Campaign, DISCOVER-AQ workshop, NASA LaRC, February 24-28, 2014.

• Liu X., TEMPO SNR requirements and retrieval performance, TEMPO SRR-MDR, NASA LaRC, November 12-13, 2013.

• Liu X., K. Chance, B. Baker, D. Flittner, J. Al-Saadi, G. Gonzalo Abad, C. Miller, R.J.D. Spurr, TEMPO Team, TEMPO requirements and trace gas retrieval performance, 4th GEMS science team meeting, Seoul, South Korea, October 14-17, 2013.

• Liu X., An introduction to optimal estimation and its application to ozone profile retrievals from satellite UV measurements, 4th GEMS Science Team Meeting, Seoul, South Korea, October 14-17, 2013 (Invited tutorial lecture).

• Liu X., K. Chance, D. Flittner, J. Al-Saadi, B. Baker, TEMPO science team, The Impact of Satellite Longitude on TEMPO Retrieval Performance and Ground Footprint, 1st TEMPO science team meeting, Cambridge, July 23-24, 2013.

• Liu X., K. Chance, TEMPO ozone profile and tropospheric ozone retrieval, 1st TEMPO science team meeting, Cambridge, July 23-24, 2013.

• Liu, X., C. Liu, K. Chance, The Impact of Using Different Ozone Cross Sections on Ozone Profile Retrievals from OMI UV Measurements, ACSO workshop, Geneva, Switzerland, June 3-5, 2013.

• Liu X., K. Chance, B. Baker, D. Flittner, J. Al-Saadi, G. Gonzalo Abad, C. Miller, R.J.D. Spurr, TEMPO Team, TEMPO requirements and predicted trace gas retrieval performance, GEO-CAPE science team meeting, NASA AMES, May 21-23, 2013.

• Liu X., J. Liu, B.N. Duncan, K. Yang, S.E. Strahan, K. Chance, P.K. Bhartia, OMI ozone profile and tropospheric ozone retrievals and cross evaluation with chemical transport models, AGU Meeting of the Americans, Cancun, Mexico, May 14-17, 2013.

• Liu X., Tropospheric Emissions: Monitoring of Pollution (TEMPO), Department of Atmospheric Science, University of Alabama in Huntsville, April 8, 2013. (Invited)

• Liu X., K. Chance, Lessons learned from GOME, SCIAMACHY, GOME-2, OMI, and OMPS, TEMPO technical meeting at GSFC, January 28-29, 2013.

18

• Liu X., K. Chance, Z. Cai, T. Valle, J. Leitch, B. Baker, Instrument Polarization Sensitivity and Polarization Correction: Impacts on Trace Gas Retrievals, TEMPO technical meeting at BATC, January 7-8, 2013.

• Liu X., K. Chance, TEMPO Measurement Requirements, Nominal and Maximum Radiances, SNR Instrument Requirements, TEMPO technical meeting at BATC, January 7-8, 2013.

• Liu X., J. Bak, K. Yang; K. Chance; L. Pan, P.K. Bhartia, C. Liu, Improvement on OMI Ozone Profile Retrievals and Validation With Ozonesonde Observations, Abstract A53Q-0437 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., December 3-7, 2012.

• Liu, X., J. Bak, K. Yang, J. Wei, L. Pan, K. Chance, P.K. Bhartia, C. Liu, Updates on OMI Ozone Profile Retrievals and Validation With Ozonesonde Observations, Aura Science Team Meeting, Pasadena, October 1-3, 2012.

• Liu, X., Ozone Profile and Tropospheric Ozone Retrievals from Space: Current Status (BUV) and Future Direction, IRSA, CAS, Beijing, October 25, 2012 (Invited).

• Liu, X., ACAM Instrument Characterization & Development of Advanced Trace Gas Retrieval Algorithms, AIFOM, CAS, Hefei, October 18, 2012. (Invited)

• Liu, X., X. Xu, J. Wang, K. Chance, R. Spurr, UNL-VRTM: A Numerical Testbed for Remote Sensing of Aerosols and Clouds and Its Preliminary Application to the TANSAT, 1st International TanSat Workshop, Beijing, October 17, 2012.

• Liu, X., K. Chance, Z. Cai, T. Valle, J. Leitch, B. Baker, Instrument Polarization Sensitivity and Polarization Correction: Impacts on Trace Gas Retrievals, 3rd GEMS workshop, Seoul, October 9, 2012.

• Liu, X., M.G. Kowalewski, S.J. Janz, P.K. Bhartia, K. Chance, N.A. Krotkov, K.E. Pickering, J.H. Crawford, Trace gas retrievals from Airborne Compact Atmospheric Mapper (ACAM) observations during the 2011 DISCOVER-AQ flight campaign, Abstract A13E-0361 presented at 2011 Fall Meeting, AGU, San Francisco, Calif., December 5-9, 2011.

• Liu, X., K. Yang, P.K. Bhartia, K. Chance, OMI Ozone Profile and Tropospheric Ozone Product (PROFOZ), OMI Science Team Meeting, Helsinki, Finland, 12 September 2011.

• Liu, X., B. N. Duncan, K. Yang, S.E. Strahan, K. Chance, and P. K. Bhartia, Intercomparison of OMI and GMI Simulations of Ozone Profiles, Aura Science Team Meeting, Helsinki, Finland, 13-15 Sep. 2011.

• Liu, X., B. Duncan, K. Yang, K. Chance, P.K. Bhartia, S.E. Strahan, Cross-evaluation of OMI ozone profiles and GMI Chemical Transport Simulation, 5th GEOS-Chem meeting, May, 2011.

• Liu, X., B. Duncan, K. Yang, K. Chance, P.K. Bhartia, S.E. Strahan, Cross-evaluation of OMI ozone profiles and GMI Chemical Transport Simulation, AGU 2010 Fall meeting, December, 2010.

• Liu, X., K. Chance, P.K. Bhartia, Sensitivity to tropospheric ozone from UV/Visible measurements on a Geostationary platform: implication for UV/visible instrument design, 1st GEMS workshop, Seoul, Korea, August 23-24, 2010.

• Liu, X., P.K. Bhartia, K. Chance, R.J.D. Spurr, T.P. Kurosu, Ozone profile and tropospheric ozone retrievals from the OMI, Asian Pacific Radiation Symposium, Seoul, Korea, August 25-28, 2010.

• Liu, X., K. Chance, Z. Cai, P.K. Bhartia, T.P. Kurosu, R.J.D. Spurr, C. Nowlan, K. Yang, Ozone Profile and Tropospheric Ozone Retrievals from BUV Measurements by GOME,

19

SCIAMACHY, OMI and GOME-2, 2010 ESA Living Planet Symposium, Bergen, Norway, June 28, 2010.

• Liu, X., P.K. Bhartia, K. Chance, R.J.D. Spurr, Monitoring of tropospheric ozone from backscattered ultraviolet/visible measurements on Geostationary platforms, AGU 2009 fall meeting, San Francsico, CA, December 14-18, 2009.

• Liu, X., M. Schoeberl, P.K. Bhartia, K. Chance, E. Yegorova, Comparison of direct ozone profile retrievals and trajectory mapping OMI/MLS residuals, AURA science team meeting, Leiden, Netherlands, September 14-18, 2009.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, L. Froidevaux, Validation of OMI stratospheric ozone profiles and stratospheric ozone column with MLS measurements, Eumetsat Meteorological Conference 2009, Bath, UK, September 21-25, 2009.

• Liu, X., K. Chance, R.J.D. Spurr, P.K. Bhartia, V. Natraj, R. Chatfield, D. Edwards, A. Eldering, J. Joiner, S. Kulawik, T.P. Kurosu, K.E. Pickering, H. Worden, Retrieval sensitivity to tropospheric and boundary layer ozone from backscattered UV, UV polarization, and measurements, GEO-CAPE workshop 2009, Columbia, MD, September 22-24, 2009.

• Liu, X., M. Schoeberl, P.K. Bhartia, K. Chance, J. Ziemke, Tropospheric ozone retrievals from backscattered data, ACC workshop on air quality, Frascati, Italy, June 15-17, 2009.

• Liu, X., Comparison of Total Ozone Column from the OMTO3, OMDOAO3, and the Ozone Profile Retrieval Algorithm, OMI science team weekly meeting, March 26, 2009.

• Liu, X., OMI Ozone Profile Retrievals and Validation of Ozone Profiles and Stratospheric Ozone Column with MLS, OMI science team weekly meeting, April 16, 2009.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, B.R. Bojikov, and ozonesonde providers, Estimation of ozone profile and tropospheric ozone from OMI, AURA science team meeting, Columbia, MD, October 28th, 2008.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, B.R. Bojikov, Monitoring of tropospheric ozone from OMI, 7th CMAS conference, Chapel Hill, NC, October 7th, 2008.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, B.R. Bojikov, R.J.D. Spurr, Validation of OMI ozone profiles and tropospheric ozone retrievals, Quadrennial Ozone Symposium, Tromso, Norway, June 29-July 5, 2008.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, B.R. Bojikov, R.J.D. Spurr, Validation of OMI ozone profiles and tropospheric ozone retrievals, OMI Science Team Meeting, Helsinki, Finland, June 24-27, 2008.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, B.R. Bojikov, L. Zhang, R.J.D. Spurr, Monitoring of tropospheric ozone from OMI, Eos Trans. AGU, 89(23), Jt. Assem. Suppl., Abstract A33A-13.

• Liu, X., Ozone Profiles and Tropospheric Ozone Retrievals from UV measurements, University of Maryland, College Park, College Park, MD, March 14, 2008. (Invited)

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, L. Zhang, R.J.D. Spurr, Ozone profile and tropospheric ozone retrieval from OMI, OMI blue team review meeting, March 7, 2008.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, and J. Ziemke, Intercomparison of HIRDLS and MLS ozone profiles with OMI data, paper presented at HIRDLS science team meeting, Boulder, Colorado, January 29-30, 2008.

20

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, Combing OMI and MLS to Improve Tropospheric Ozone Retrievals for Air Quality Applications, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract A52D-06, 2007.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, Validation of OMI UV radiances and ozone profiles with MLS data, OMI Weekly Science Team Meeting, November 8, 2007.

• Liu, X., P.K. Bhartia, K. Chance, T.P. Kurosu, R.J.D. Spurr, Validation of OMI UV radiances and ozone profiles with MLS data, AURA science team meeting, Pasadena, CA, October 1-5,2007.

• Liu, X., Ozone Profiles and Tropospheric Ozone Retrievals from UV measurements, University of Alabama In Huntsville, Huntsville, AL, October 10, 2007. (Invited)

• Liu, X., Ozone Profiles and Tropospheric Ozone Retrievals from UV measurements, NASA GSFC Code 613.3, Greenbelt, MD, September 13, 2007. (Invited)

• Liu, X., Ozone Profiles and Tropospheric Ozone Retrievals from UV measurements, JPL, Pasadena, CA, August 13, 2007. (Invited)

• Liu, X., K. Chance, L. Zhang, T.P. Kuosu, J.R. Worden, K.W. Bowman, Pawan K. Bhartia, and D.J. Jacob, Ozone Profiles and Tropospheric Ozone Retrievals from OMI, OMI International Science Team Meeting 2007, UMBC, Baltimore, MD, June 5-8, 2007.

• Liu, X., K. Chance, and T.P. Kurosu, An eight-year record of ozone profiles and tropospheric ozone from GOME, Envisat Symposium 2007, Montreux, Switzerland, April 23-27, 2007.

• Liu, X., L. Zhang, K. Chance, J.R. Worden, K.W. Bowman, T.P. Kurosu, D.J. Jacob, Cross-evaluation of OMI, TES and GEOS-Chem tropospheric ozone, 3rd GEOS-Chem Users’ Meeting, Cambridge, MA, April 11-13, 2007.

• Liu, X., Ozone profile and tropospheric ozone retrievals from GOME UV measurements, University of Toronto, Toronto, Canada, November 7, 2006. (Invited)

• Liu, X., An eight-year record of ozone profiles and tropospheric column ozone from GOME, Institute of Atmospheric Physics, CAS, Beijing, China, July 21, 2006. (Invited)

• Liu, X., An eight-year record of ozone profiles and tropospheric column ozone from GOME, National Satellite Meteorological Center, CMA, Beijing, China, August 4, 2006. (Invited)

• Liu, X., K. Chance, and C.E. Sioris, Impact of using different ozone cross sections on ozone profile retrievals from GOME ultraviolet measurements, The 9th HITRAN Database Conference, Cambridge, MA, June 26-28, 2006.

• Liu, X., K. Chance, N. Moore, R.V., Martin, D. Jones, Global observations of sulfur dioxide from GOME, the 36th COSPAR Scientific Assembly, Beijing, China, July 16-23, 2006.

• Liu, X., K. Chance and T.P. Kurosu, An eight-year record of ozone profiles and tropospheric column ozone from GOME, the 36th COSPAR Scientific Assembly, Beijing, China, July 16-23, 2006.

• Liu, X. Ozone Profile and Tropospheric Ozone Retrieval from GOME, Ozone Profile Retrieval Workshop, SSAI, Lanham, MA, April 11, 2006.

• Liu, X. Ozone Profile and Tropospheric Ozone Retrieval from GOME, Ozone Profile Retrieval Workshop, NOAA/NESDIS, Camp Spring, MD, April 10, 2006.

• Liu, X., K. Chance, C.E. Sioris, T.P. Kurosu, R.J.D. Spurr, R.V. Martin, M.J. Newchurch, T.M. Fu, J.A. Logan, D.J. Jacob, P.I. Palmer, I.A. Megretskaia, R. Chatfield, Directly Retrieved Global Distribution of Tropospheric Column Ozone, Air Quality Remote Sensing Workshop, Boulder, February 21-23, 2006.

21

• Liu, X., K. Chance, C.E. Sioris, T.P. Kurosu, Ozone profile and tropospheric ozone retrieval from SCIAMACHY nadir measurements, San Francisco, AGU 2005 Fall Meeting, 2005.

• Liu X., First Directly-Retrieved Global Distribution of Tropospheric Column Ozone from GOME, Institute of Atmospheric Physics, CAS, Beijing, China, May 26, 2005. (Invited)

• Liu X., K. Chance,M. Deland, P.K. Bhartia, Ozone profile retrieval from SBUV sweep mode data: Preliminary results, TOMS/SBUV meeting, May 11, 2004.

• Liu X., K. Chance, C.E. Sioris, T.P. Kurosu, R.J.D. Spurr, R.V. Martin, M. Fu, J.A. Logan, I. Megretskaia, M.J. Newchurch, P.I. Palmer, D.J. Jacob, R. Chatfield, P.K. Bhartia, Cross-evaluation of GOME and GEOS-CHEM Tropospheric Column Ozone Observations, 2nd-GEOS-CHEM Users Meeting, Harvard University, Cambridge, USA, April 4, 2005.

• Liu, X., Direct tropospheric ozone retrieval from GOME, Atmospheric Chemistry & Modeling Group, Harvard University, Cambridge, MA, December 20, 2004. (Invited)

• Liu, X., K. Chance, C.E Sioris, R.J.D. Spurr, T.P. Kurosu, and M.J. Newchurch, P.K. Bhartia, Direct tropospheric ozone retrieval from GOME, AGU Fall 2004 Meeting, San Francisco, 2004.

• Liu, X., K. Chance, C.E Sioris, R.J.D. Spurr, T.P. Kurosu, and M.J. Newchurch, P.K. Bhartia, Direct tropospheric ozone retrieval from GOME: algorithm description, validation, and global distribution, INTEX-EMIS Meeting, Concord, New Hampshire, August 3, 2004.

• Liu, X., M.J. Newchurch, R. Loughman, and P. K. Bhartia, and J.H. Kim, TOMS Ozone Anomalies and Ozone Retrieval Errors Over Cloudy Areas, Eos Trans AGU, Fall Meet. Suppl., San Francisco, 2003.

• Liu X., Ozone Retrieval Errors Associated with Clouds in Total Ozone Mapping Spectrometer (TOMS) Data, Jackson State University, MS, January, 2003. (Invited)

• Liu, X., Ozone Retrieval Errors Associated with Clouds in Total Ozone Mapping Spectrometer (TOMS) Data, Ph.D. Dissertation Defense, Huntsville, AL, November 15, 2002.

• Liu, X., M. Newchurch, J. Kim, Lower-tropospheric Ozone Derived from TOMS V7 Level-2 Data, Aura Validation Meeting, Boulder, CO, September 17, 2002.

• Liu, X., M. Newchurch, J. Kim, TOMS Accuracy over High Convective Cloudy Areas, Aura Validation Meeting, Boulder, CO, September 17, 2002.

• Liu, X., M. Newchurch, R. Loughman, P. K. Bhartia, TOMS Ozone Retrieval Sensitivity to Assumption of Lambertian Cloud Surface (II), Aura Validation Meeting, Boulder, CO, September 17, 2002.

• Liu, X., M. Newchurch, R. Loughman, P. K. Bhartia, TOMS Ozone Retrieval Sensitivity to Assumption of Lambertian Cloud Surface (I), Aura Validation Meeting, Boulder, CO, September 17, 2002.

• Liu, X., M. Newchurch, R. Loughman, P.K. Bhartia, TOMS Ozone Retrieval Errors Associated with Clouds, Harvard-Smithsonian Center for Astrophysics, Cambridge, April 18-19, 2002. (Invited)

• Liu, X., M. Newchurch, R. Laughman, P.K. Bhartia, TOMS Ozone Retrieval of Lambertian Cloud Surface Part 1. Scattering Phase Function, TOMS Science Meeting, Greenbelt, MD, October, 2001.

• Liu, X., M. Newchurch, R. Laughman, P.K. Bhartia, TOMS Ozone Retrieval of Lambertian Cloud Surface Part 2. In-cloud Multiple Scattering, TOMS Science Meeting, Greenbelt, MD, October, 2001.

22

• Liu, X., M.J. Newchurch, J.H. Kim, Lower-tropospheric Ozone Derived from TOMS V7 Level-2 Data, TOMS Meeting, Huntsville, AL 3-5 May, 2000.

• Liu, X., M.J. Newchurch, D. Sun, J.H. Kim, TOMS Accuracy over High Convective Cloudy Areas, TOMS Meeting, Huntsville, AL 3-5 May, 2000.

• Liu, X., M.J. Newchurch, J.H. Kim, Occurrence of TOMS V7 Level-2 Ozone Anomalies over Cloudy Areas, TOMS Meeting, Huntsville, AL 3-5 May, 2000.