adient wp3.2 adient wp3.2 observational determination of the impact of anthropogenic pollution...
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ADIENT WP3.2 ADIENT WP3.2 ‘Observational determination of the impact of anthropogenic pollution aerosol on the TOA radiation budget and its sensitivity to the
aerosol properties’
Alexandros P. Georgiadis & Helen E. Brindley
Aims/Approach Aims/Approach
Assessing the Radiative Impact of anthropogenic pollution aerosol on the TOA radiation budget
Satellite derived: ττ & reflected SWFSWF
brdbnd Rad. / mult. CHN IMG
SWSWLL↑↑
(CERES / MODIS Christopher and Zhang , 2004)
(CERES / VIRS Loeb and Kato, 2002 )
Conversion
Scene Identification procedure
Approach:Approach:
Present Study:Present Study:
Similar approach
brdbnd Rad.
mult. CHN IMG
: GERB 15 mins 50 x 50 km
: SEVIRI - 12 Chn 15 mins 3X3 Km
GERB HR productsGERB HR products 15 mins
10 x 10 km
Scene Identification procedure
reflected SWLSWL
τ 1 .6
τ 0 .8
τ 0 .6
narrow 2 bdbnd
(R)(R)
Objectives Objectives (11/2009)
D3.2.1D3.2.1 : ‘Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website’
D3.2.2D3.2.2 : ‘New aerosol anisotropy factors (R) for anthropogenic aerosol through combined analysis of aircraft /satellite observations’
α) Maps of : i. GERB HR τ1.6, τ0.8 and τ0.6
ii. α = f (τ1.6, τ0.6) & α = f (τ0.8, τ0.6)
iii. GERB HR SWL and SWF
iv. R = f (SWL, SWF)
D3.2.1D3.2.1 : ‘Maps of Geostationary Earth Radiation Budget (GERB) aerosol scene identification available on the ADIENT website’
Work thus farWork thus far
β) Compile and plot data-series of the above data along the track of each flight
FLT DATE TAKEOFF LANDING PROJECTb333 12/13/07 10:45 15:45 ADIENTb334 12/18/07 11:00 16:00 VISURBb335 12/19/07 11:00 16:00 ADIENTb355 04/02/08 12:00 16:00 ADIENTb356 04/10/08 10:00 16:00 ADIENTb357 04/16/08 10:45 18:30 ADIENTb401 09/18/08 14:00 18:00 ADIENTb402 09/19/08 10:00 15:00 ADIENTb404 09/23/08 10:00 15:00 ADIENTb406 09/25/08 10:00 15:30 ADIENT
B356B356
10:56
11:11
11:41
11:56
12:11
12:26
12:56
15:26
j
iij
j
i
ln
ln
12:11
12:26
F
LR
π
12:26
B355B35504/200804/2008
B356B35604/200804/2008
B357B35704/200804/2008
B402B40209/200809/2008
B356B35604/200804/2008
B355B35504/200804/2008
B357B35704/200804/2008
B402B40209/200809/2008
Future Work Future Work
D3.2.2D3.2.2 : ‘New aerosol anisotropy factors (R) for anthropogenic aerosol through combined analysis of aircraft /satellite observations’
SWFSWF• SWLSWL↑↑
Conversion
),(),(
ατF
LατR
scene,geomety, viewing scene,geomety, viewingocean
There is no specific aerosol treatment in the GERB processing chain.
i. CERES correction code (Brindley and Russell, 2008)
ii. Empirical ADMs = f(Vwind, geometry, τ, n) (Zhang and
Christopher, 2005)
• Implementation of R effect in the GERB Implementation of R effect in the GERB conversion chain conversion chain
iii. Develop Theoretical ADMs similar to the ones by Brindley and Russell (2008) using the aerosol properties from the FAAM flights.
References :
Brindley, H.E. and J.E. Russell, 2008: Assessing the Errors in shortwave radiative fluxes inferred from the Geostationary Earth Radiation Budget (GERB) Instrument in the Presence of Dust Aerosol. J. Appl. Meteor., 47, 1659-1680.
Brindley, H.E. and A. Ignatov, 2006: Retrieval of mineral aerosol optical depth and size information from Meteosat Second Generation SEVIRI solar reflectances bands. Remote Sens. Environ., 102, 344-363.
Christopher, S.A. and J. Zhang, 2004: Cloud free shortwave aerosol radiative effect over oceans: Strategies for identifying anthropogenic forcing from Terra satellite measurements. Geophys. Res. Lett., 31, L18101.
Loeb, N.G. and S. Kato, 2002: Top-of-Atmosphere Direct Radiative Effect of aerosols over the Tropical Oceans from the Clouds and the Earth’s Radiant Energy System (CERES) satellite instrument. J. Climate, 15, 1474-1484.
VIS 0.6VIS 0.8
IR 8.7 Earth Imaging Principle
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