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In situ phytoplankton absorption, fluorescence emission, and particulate backscattering spectra determined from reflectanceAn inverse model was developed to extract the absortion and scattering (elastic and inelastic) properties of oceanic constituents from surface spectral reflectance measurements. In particular, phytoplankton spectral absorption coefficients, solar-stimulated chlorophyll a fluorescence spectra, and particle backscattering spectra were modeled. The model was tested on 35 reflectance spectra obtained from irradiance measurements in optically diverse ocean waters (0.07 to 25.35 mg/cu m range in surface chlorophyll a concentrations). The universality of the model was demonstrated by the accurate estimation of the spectral phytoplankton absorption coefficents over a range of 3 orders of magnitude (rho = 0.94 at 500 nm). Under most oceanic conditions (chlorophyll a less than 3 mg/cu m) the percent difference between measured and modeled phytoplankton absorption coefficents was less than 35%. Spectral variations in measured phytoplankton absorption spectra were well predicted by the inverse model. Modeled volume fluorescence was weakly correlated with measured chl a; fluorescence quantum yield varied from 0.008 to 0.09 as a function of environment and incident irradiance. Modeled particle backscattering coefficients were linearly related to total particle cross section over a twentyfold range in backscattering coefficents (rho = 0.996, n = 12).
Document ID
19950062271
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Roesler, Collin S.
(Univ. of Washington, Seattle, WA Us, United States)
Pery, Mary Jane
(Univ. of Washington, Seattle, WA Us, United States)
Date Acquired
August 16, 2013
Publication Date
July 15, 1995
Publication Information
Publication: Journal of Geophysical Research
Volume: 100
Issue: C7
ISSN: 0148-0227
Subject Category
Oceanography
Accession Number
95A93870
Funding Number(s)
CONTRACT_GRANT: NGT-50681
CONTRACT_GRANT: NOOO14-90-J-1091
CONTRACT_GRANT: NOOO14-93-I-0150
Distribution Limits
Public
Copyright
Other

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