Abstract

We present an experimental model of CDOM solar-stimulated fluorescence. Three-dimensional fluorescence spectra of natural waters were use to determine the solar-stimulated emission as a function of depth in the water column. Inclusion of the wavelength-dependent fluorescence quantum yield provides emission values in absolute units of photons s^-1 cm^-2 5nm^-1. Attenuation of light in the water column was also modeled, allowing determination of total upwelled emission. The upwelled fluorescence is compared to irradiance reflectance calculated from a semianalytical model. The fluorescence contribution to reflectance in the blue-green region can be as high as 70% for blackwater, but is rapidly reduced by the introduction of scattering particles. Except for blackwaters. CDOM fluorescence does not significantly affect irradiance reflectance ratios commonly used in remote-sensing applications. In water with moderate amounts of CDOM (absorption coefficient at 355 nm >/= 0.5 m^-1), fluorescence will dominate water Raman scattering as a secondary influence on the light field in the green spectral region.

Publication Date

1994

Comments

This article may be accessed from the publisher's website (additional fees may apply) at: http://aslo.org/lo/toc/vol_39/issue_1/0001.pdf We thank Frank Hoge for supporting this work and Edward Sheppard for collecting the sample from the Georgia coast. This work was done while A.V. held a National Research Council-NASA resident research associateship. Contribution 8300 from the Woods Hole Oceanographic Institution. Work at Woods Hole was supported by NASA/EOS interdisciplinary investigation (NAGW-243 1) and by the Office of Naval Research (NO00 14-89-J- 1260).ISSN:0024-3590 Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

Document Type

Article

Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)

Campus

RIT – Main Campus

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