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Applied Optics

Applied Optics


  • Vol. 38, Iss. 18 — Jun. 20, 1999
  • pp: 3876–3887

Partitioning in situ total spectral absorption by use of moored spectral absorption–attenuation meters

Grace C. Chang and Tommy D. Dickey  »View Author Affiliations

Applied Optics, Vol. 38, Issue 18, pp. 3876-3887 (1999)

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High-temporal-resolution spectral absorption data were acquired by use of one bottom-mounted (∼68-m) and three moored spectral absorption and attenuation meters (ac-9 meters at 14, 37, and 52 m) on the Middle Atlantic Bight continental shelf during the fall 1996 period of the Coastal Mixing and Optics experiment. We employed a previously published spectral absorption model with the data to partition total absorption into absorption by water, phytoplankton, detritus, and gelbstoff (dissolved matter). We validated the model by comparing its results against coincident in vivo absorption coefficients derived from discrete bottle samples. Correlations between modeled and in vivo spectra range from 0.873 to 0.998. We optimized these correlations to determine the model parameters. These parameters could not be determined solely from the moored ac-9 results. Therefore a separate set of absorption measurements (from discrete bottle samples) was necessary to permit values for the model parameters to be determined. Model results allow us to separate particulate and dissolved components of absorption and to examine the temporal variability and the vertical distributions and concentrations of each component, given the total absorption in the water column.

© 1999 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics

Original Manuscript: December 8, 1998
Revised Manuscript: April 13, 1999
Published: June 20, 1999

Grace C. Chang and Tommy D. Dickey, "Partitioning in situ total spectral absorption by use of moored spectral absorption–attenuation meters," Appl. Opt. 38, 3876-3887 (1999)

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