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Remote Sens. 2018, 10(8), 1309; https://doi.org/10.3390/rs10081309

Radiative Transfer Modeling of Phytoplankton Fluorescence Quenching Processes

1
Department of Physics, University of Maryland Baltimore County, Baltimore, MD 21250, USA
2
School of Marine Sciences, University of Maine, Orono, ME 04401, USA
3
NASA Goddard Space Flight Center, Code 616, Greenbelt, MD 20771, USA
4
MS 475 NASA Langley Research Center, Hampton, VA 23681-2199, USA
*
Author to whom correspondence should be addressed.
Received: 12 July 2018 / Revised: 9 August 2018 / Accepted: 11 August 2018 / Published: 20 August 2018
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Abstract

We report the first radiative transfer model that is able to simulate phytoplankton fluorescence with both photochemical and non-photochemical quenching included. The fluorescence source term in the inelastic radiative transfer equation is proportional to both the quantum yield and scalar irradiance at excitation wavelengths. The photochemical and nonphotochemical quenching processes change the quantum yield based on the photosynthetic active radiation. A sensitivity study was performed to demonstrate the dependence of the fluorescence signal on chlorophyll a concentration, aerosol optical depths and solar zenith angles. This work enables us to better model the phytoplankton fluorescence, which can be used in the design of new space-based sensors that can provide sufficient sensitivity to detect the phytoplankton fluorescence signal. It could also lead to more accurate remote sensing algorithms for the study of phytoplankton physiology. View Full-Text
Keywords: radiative transfer; ocean optics; inelastic scattering; fluorescence radiative transfer; ocean optics; inelastic scattering; fluorescence
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhai, P.-W.; Boss, E.; Franz, B.; Werdell, P.J.; Hu, Y. Radiative Transfer Modeling of Phytoplankton Fluorescence Quenching Processes. Remote Sens. 2018, 10, 1309.

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