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Amanda Hyde Antonio Mannino (advisor) Research and Discover Program; 2010

A Comparison of Particulate Organic Carbon (POC) from In situ and Satellite Ocean Color Data Off the Coast of Antarctica. Amanda Hyde Antonio Mannino (advisor) Research and Discover Program; 2010. Importance of satellites.

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Amanda Hyde Antonio Mannino (advisor) Research and Discover Program; 2010

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  1. A Comparison of Particulate Organic Carbon (POC) from In situ and Satellite Ocean Color Data Off the Coast of Antarctica Amanda Hyde Antonio Mannino (advisor) Research and Discover Program; 2010

  2. Importance of satellites Spatial coverage from scientific cruises over 20 years (Gardner et al. 2006) versus Spatial cover from SeaWiFS on July 18, 2010 (http://oceancolor.gsfc.nasa.gov 2010)

  3. The satellite views the spectral light field at the top-of-the-atmosphere. Satellite Top-of-the-Atmosphere 1. Removes atmosphere from the total signal to derive estimate of light field emanating from sea surface (water-leaving radiance, Lw). 3. Spatially / temporally bin and remap satellite POC observations. Sea Surface 2. Relates remote-sensing reflectance to geophysical product (POC) of interest. POC Measuring POC from satellites Orbital path of MODIS (NASA Ocean Biology Processing Group 2008) Basics of measuring ocean color from an orbiting satellite (NASA Ocean Biology Processing Group 2008)

  4. ultra-violet visible light near-infrared wavelength (nm) Algorithms Rrs(λ) = remote-sensing reflectance (units = sr-1) NASA Ocean Biology Processing Group 2008 POC = 169.7×[Rrs(443)/Rrs(555)]-0.936 (Stramski et al. 2008)

  5. Study site Sampling stations off the coast of the Antarctic Peninsula www.bugbog.com 2010 N A. Hyde 2010

  6. in the lab... 12M HCl acid fuming to remove inorganic carbon (A. Hyde 2010) Elementar vario MICRO cube CHN Elemental Analyzer (A. Hyde 2010) From filter to tablet (A. Hyde 2010)

  7. Processing satellite data • Level 1A ocean color data (available at oceancolor.gsfc.nasa.gov) • Dates used: Feb 21 - Mar 4, 2008 • 60S - 65S latitude; 50W - 63W longitude • Seadas 6.1.1 used for processing http://oceancolor.gsfc.nasa.gov 2010

  8. Results • In situ [POC] ranged from 79.0 ug/L to 232.2 ug/L • Satellite derived [POC] ranged from 69.0 ug/L to 155.2 ug/L A. Hyde 2010 Example of L2 POC data file of March 4, 2008 (A. Hyde 2010)

  9. Statistics • Mean APD% = 16.4% • RMSE = 30.4 ug/L • Percent differences ranged between 4.1% and 33.2% • No significant difference between in situ and satellite derived POC (JMP 8.0, one-way ANOVA, p > 0.05) R2 = 0.89 slope = 0.52 RMSE = 30.4 N = 11

  10. need for further satellite validation • SOS cruise lasted 13 days; 2 days of satellite ocean color data were usable • 85 stations included; only 11 had correlating satellite ocean color data • Data containing clouds, ice, sun glint, high radiance, stray light, high viewing zenith angle, and high solar zenith angle were all excluded • On average, only 15% of satellite data are usable (Bailey and Werdell 2006) www.tpwd.state.tx.us 2010

  11. Thanks to... • UNH-NASA Research and Discover Program • Antonio Mannino - advisor • Mike Novak - lab help • Sean Bailey - Seadas 6.1.1 help www.eos.unh.edu 2010 www.nasa.gov 2010

  12. Questions... http://blog.1choice4yourstore.com 2010

  13. Literature cited • Anon. 2008. “Protocol for vario MICRO cube Elemental Analyzer” handout from A. Mannino. 14 Jun 2010. • Bailey, S. W. and P. J. Werdell. 2006. A multi-sensor approach for the on-orbit validation of ocean color satellite data products. Remote Sensing of Environment 102: 12-23. • Gardner, W. D., A. V. Mishonov, and M. J. Richardson. 2006. Global POC concentrations from in-situ and satellite data. Deep-Sea Research II 53: 718-740. • Mannino, A., M. E. Russ, and S. B. Hooker. 2008. Algorithm development and validation for satellite-derived distributions of DOC and CDOM in the U.S. Middle Atlantic Bight. Journal of Geophysical Reserach 113 • Stramski, D., R. A. Reynolds, M. Babin, S. Kaczmarek, M. R., Lewis, R. Röttgers, A. Sciandra, M. Stramska, M. S. Twardowski, B. A. Franz, and H. Claustre. 2008. Relationships between the surface concentration of particulate organic carbon and optical properties in the eastern South Pacific and eastern Atlantic Ocean. Biogeosciences 5: 171-201.

  14. Image Citations • Anon. 2010. Antarctica Circle Map. http://www.bugbog.com/images/maps/antarctic-circle_map.jpg (22 Jul 2010) • Anon. 2010. home page www.nasa.gov (22 Jul 2010) • Anon. 2010. Sunday, 18 Jul 2010 (2010199). http://oceancolor.gsfc.nasa.gov/cgi/pcac9000.pl?day=2010199W (13 Jul 2010) • Anon. 2010. untitled. http://oceancolor.gsfc.nasa.gov/cgi/l3/A20080572008064.L3m_8D_POC_poc_4km.png?sub=img (13 Jul 2010) • Anon. 2010. Research and Discover. http://www.eos.unh.edu/researchanddiscover/interns.shtml (29 Jul 2010) • Fennell, S. 2010. Do you have questions about your online store? #ecommerce. http://blog.1choice4yourstore.com/2010_03_01_archive.html (21 Jul 2010) • Gardner, W. D., A. V. Mishonov, and M. J. Richardson. 2006. Global POC concentrations from in-situ and satellite data. Deep-Sea Research II 53: 718-740. • Hyde, A. 2010. Personal photos. • Loeffler, C. 2004. The state of wonder: what’s all this fuss about water? http://www.tpwd.state.tx.us/learning/webcasts/connections04/water.phtml (23 Jul 2010) • NASA Ocean Biology Processing Group. 2008. Satellite observations of ocean color. SeaDAS Training Material; Goddard Space Flight Center, Greenbelt, Maryland.

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