correspondence between net oxygen production and measurements of inherent optical properties
DESCRIPTION
Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties. Cedric Hall Elizabeth City State University Mentor: Dr. Joseph Salisbury. Hypothesis. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/1.jpg)
Correspondence Between Net Oxygen Production and Measurements of Inherent
Optical Properties
Cedric HallElizabeth City State UniversityMentor: Dr. Joseph Salisbury
![Page 2: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/2.jpg)
Hypothesis• Given: variability in the biological oxygen stock is
the net result of the production and consumption of the organic particles…….
• We can derive Net Community Production (P-R) if we can accurately account for organic particle growth and consumption in time and space
• Further, we can retrieve organic particle stock information using inherent optical properties
![Page 3: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/3.jpg)
Table of Contents
• Abstract• Background Info• What was done• Results• NASA Significance• Conclusions
![Page 4: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/4.jpg)
Abstract
• Data Collection– Lagrangian cruise– Bottles and Profiling sensors
• Data Processing– Calculate the biological oxygen anomaly to the 1% light level– Integrated inventories of absorption, attenuation, and particle
backscattering at different wavelengths, and chlorophyll fluorescence to the 1% light level
• Explored relationships between optical variables and the biological oxygen anomaly– Concentrations (mass/volume)– Inventories (per meter^2)– Rates of change of inventories (mass per time)
![Page 5: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/5.jpg)
Background Info
• Photosynthesis and respiration are the two main processes in the production and consumption of oxygen in the ocean– Starts with phytoplankton
• Absorbs light and consumes Dissolved Inorganic Carbon(DIC) through chlorophyll
• Produces Particulate Organic Carbon (POC, living tissue) along with oxygen.
• Respiration occurs as the heterotrophic community consumes POC
• The biological oxygen anomaly is the observed oxygen minus the expected oxygen– The purpose of the finding the anomaly is to account for the
variability in oxygen produced solely due to biology.
![Page 6: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/6.jpg)
Biological Oxygen Anomaly
• Get oxygen, expected oxygen, and anomaly on a same plot (use hold on)
umol/m^3
![Page 7: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/7.jpg)
Absorption and Attenuation from the Wetlabs ac-s
![Page 8: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/8.jpg)
Lagrangian Cruise
Drogue drifted at 12m because that was the expected chlorophyll maximum depth
![Page 9: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/9.jpg)
Profilers
PAR Sensor
Chlorophyll Fluorescence Sensor
Absorption and Attenuation Tubes
![Page 10: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/10.jpg)
Water Sampling• We got water from
depths of 2m and 12m• Samples were used to
offset the oxygen profiles from the IOP machine.
• Water used to calibrate the instruments for chlorophyll and oxygen.
![Page 11: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/11.jpg)
Data Processing with Matlab
• After seabass files were read into Matlab, programs were developed to manipulate data.
• We used the PAR data from the little CTD machine in order to find depths of 1% light level.
• Developed program to integrate variables to the 1% light level.
![Page 12: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/12.jpg)
Profiles (n=23)
![Page 13: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/13.jpg)
Robust Relationships
![Page 14: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/14.jpg)
Temporal Differencing Plots
![Page 15: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/15.jpg)
NASA Significance
• If you can track the oxygen stock in time and space through information on particle dynamics, then you can estimate net community productivity with satellite data
![Page 16: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/16.jpg)
Conclusions
• bbp555 corresponds best with the biological anomaly, others were not as good
• The change in the optical properties and the change in the biological oxygen stock tend to correspond at measured time scales.
• If further research proves these relationships to be robust, then it implies that we can track and predict NCP from optical measurements.
![Page 17: Correspondence Between Net Oxygen Production and Measurements of Inherent Optical Properties](https://reader036.vdocuments.net/reader036/viewer/2022062410/568160ad550346895dcfcd25/html5/thumbnails/17.jpg)
Acknowledgements
• Dr. Linda Hayden, Elizabeth City State University, Dr. George Hurtt, University of New Hampshire, Dr. Joseph Salisbury, Timothy Moore, Chris Hunt, Olivia De Meo, and Mimi Szeto