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Analysis of ocean color components within stratified and well-mixed waters of the western English ChannelIn situ pigment and dissolved organic carbon (DOC) data from two distinct hydrographic regions of the western English Channel are used to explore the possible marine DOC contamination of the past satellite estimates of phytoplankton biomass. To compare with field measurements, the individual spectral contributions of DOC, pigments, and water to the total diffuse attenuation coefficient, K(sub par), are summed on a quantum basis within stratified waters near Plymouth, England; and for the spectrally averaged diffuse attenuation coefficient, K(sub d), on an energy basis within tidally mixed waters near Roscoff, France. In addition, coastal zone color scanner (CZCS) images from 1979 to 1986 were used to compute DOC concentrations for comparison with in situ values. Our analysis suggests that almost 50% of the color signal of satellite-sensed pigments may be attributed to absorption by marine colored DOC (CDOC) within the English Channel. These results compare favorably to the in situ DOC measurements off Plymouth, but not to off-Roscoff measurements, suggesting that there may be more CDOC in the stratified waters and more nonabsorbing DOC in the tidally mixed waters.
Document ID
19950057108
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hochmann, Herschel T.
(University of South Florida, St. Petersburg, FL United States)
Walsh, John J.
(University of South Florida, St. Petersburg, FL United States)
Carder, Kendall L.
(University of South Florida, St. Petersburg, FL United States)
Sournia, A.
(Observatoire Oceanologique de Roscoff Paris, France)
Muller-Karger, Frank E.
(University of South Florida, St. Petersburg, FL United States)
Date Acquired
August 16, 2013
Publication Date
June 15, 1995
Publication Information
Publication: Journal of Geophysical Research
Volume: 100
Issue: C6
ISSN: 0148-0227
Subject Category
Oceanography
Accession Number
95A88707
Funding Number(s)
CONTRACT_GRANT: NAGW-3459
CONTRACT_GRANT: NAGW-3483
CONTRACT_GRANT: NAGW-465
CONTRACT_GRANT: N00014-89-J-1091
Distribution Limits
Public
Copyright
Other

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