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Decadal time‐series of SeaWiFS retrieved CDOM absorption and estimated CO 2 photoproduction on the continental shelf of the eastern United States
Author(s) -
Del Vecchio Rossana,
Subramaniam Ajit,
Schollaert Uz Stephanie,
BallabreraPoy Joaquim,
Brown Christopher W.,
Blough Neil V.
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl036169
Subject(s) - colored dissolved organic matter , seawifs , environmental science , ocean color , radiance , dissolved organic carbon , spectral slope , continental shelf , absorption (acoustics) , oceanography , climatology , atmospheric sciences , remote sensing , geology , chemistry , physics , phytoplankton , optics , spectral line , organic chemistry , nutrient , satellite , astronomy
Published algorithms were employed to convert SeaWiFS images of normalized water‐leaving‐radiance to absorption images of CDOM (chromophoric dissolved organic matter). The best performing algorithm was employed to produce decadal time‐series of CDOM monthly composites from 1998 through 2007. Deficits in CDOM absorption coefficient for surface waters across the shelf over the summer were then acquired relative to the uniformly mixed waters prior to and following stratification (spring and fall, respectively). Estimates were attained of the photochemical oxidation of carbon to CO 2 on and beyond the shelf of the Middle Atlantic Bight. Approximately 3–7 × 10 10 g C as CO 2 were estimated to be produced via photooxidation of CDOM over the summertime, highlighting the significance of CDOM photochemistry and pointing out the importance of CO 2 photoproduction at a global scale. In principle, this approach could be applied to global ocean color data.