Timeseries of SeaWiFS retrieved CDOM absorption and estimates of CO2 photoproduction on the continental shelf of the Eastern United States
Rossana
Del Vecchio, ESSIC, UMD, rossdv@umd.edu
(Presenting)
Ajit
Subramaniam, Lamont Doherty Earth Observatory,Palisades, ajit@ldeo.columbia.edu
Stephanie
Schollaert Uz, ESSIC, UMD, ses@essic.umd.edu
Joaquim
Ballabrera Poi, ICM-CSIC, Spain, joaquim@cmima.csic.es
Christopher
W
Brown, NOAA, christopher.w.brown@noaa.gov
Neil
V
Blough, Chemistry, UMD, neilb@umed.edu
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 chosen to produce monthly composites of CDOM 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 (i) the spatial CDOM absorption deficits caused by photobleaching in the mixed layer and (ii) the photochemical oxidation of carbon to CO2 on the shelf of the Middle Atlantic Bight.
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