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Retrieving Marine Inherent Optical Properties from Satellites Using Temperature and Salinity-dependent Backscattering by SeawaterTime-series of marine inherent optical properties (IOPs) from ocean color satellite instruments provide valuable data records for studying long-term time changes in ocean ecosystems. Semi-analytical algorithms (SAAs) provide a common method for estimating IOPs from radiometric measurements of the marine light field. Most SAAs assign constant spectral values for seawater absorption and backscattering, assume spectral shape functions of the remaining constituent absorption and scattering components (e.g., phytoplankton, non-algal particles, and colored dissolved organic matter), and retrieve the magnitudes of each remaining constituent required to match the spectral distribution of measured radiances. Here, we explore the use of temperature- and salinity-dependent values for seawater backscattering in lieu of the constant spectrum currently employed by most SAAs. Our results suggest that use of temperature- and salinity-dependent seawater spectra elevate the SAA-derived particle backscattering, reduce the non-algal particles plus colored dissolved organic matter absorption, and leave the derived absorption by phytoplankton unchanged.
Document ID
20140005674
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Werdell, Paul J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Franz, Bryan Alden
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Lefler, Jason Travis
(JHT, Inc. Orlando, FL, United States)
Robinson, Wayne D.
(Science Applications International Corp. McLean, VA, United States)
Boss, Emmanuel
(Maine Univ. Orono, ME, United States)
Date Acquired
May 13, 2014
Publication Date
December 23, 2013
Publication Information
Publication: Optics Express
Publisher: Optic Express
Volume: 21
Issue: 26
Subject Category
Geosciences (General)
Oceanography
Report/Patent Number
GSFC-E-DAA-TN12659
Funding Number(s)
CONTRACT_GRANT: NNG14HZ03C
CONTRACT_GRANT: NNG12HZ03C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Passive Remote Sensing
Oceanic scattering
Backscattering
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