Untangling the make-up of the NIR reflectance peak in coastal waters and its impact on remote sensing retrievals of [Chl] and fluorescence height algorithms

S. Ahmed; A. Gilerson; J. Zhou; R. Dyer; S. Hlaing; I. Ioannou; B. Gross; F. Moshary

doi:10.1117/12.800378

13 October 2008 Untangling the make-up of the NIR reflectance peak in coastal waters and its impact on remote sensing retrievals of [Chl] and fluorescence height algorithms

S. Ahmed, A. Gilerson, J. Zhou, R. Dyer, S. Hlaing, I. Ioannou, B. Gross, F. Moshary

Author Affiliations +

Proceedings Volume 7105, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2008; 710508 (2008) https://doi.org/10.1117/12.800378
Event: SPIE Remote Sensing, 2008, Cardiff, Wales, United Kingdom

Abstract

Recent studies show that the contribution of the chlorophyll fluorescence component to the NIR reflectance is significant only for relatively low concentrations of minerals; furthermore, Fluorescence Line Height (FLH) algorithms do not work properly for [Chl] > 5-10 mg/m³ because of the deviation of elastic reflectance from the baseline. But even for relatively low chlorophyll concentration [Chl] values the relationship between FLH and [Chl] is affected by several factors which should be taken into account. The sensitivity of this relationship to atmospheric correction schemes, incident and viewing angles and chlorophyll retrieval algorithms are analyzed, and a special correlation procedure is developed to minimize these effects. Effective fluorescence quantum yield distributions retrieved from field measurements and satellite imagery are also compared with the previously indirectly estimated values based on the analysis of the shift of the observed NIR reflectance peak from the fluorescence peak at 685 nm.

Citation Download Citation

S. Ahmed, A. Gilerson, J. Zhou, R. Dyer, S. Hlaing, I. Ioannou, B. Gross, and F. Moshary "Untangling the make-up of the NIR reflectance peak in coastal waters and its impact on remote sensing retrievals of [Chl] and fluorescence height algorithms", Proc. SPIE 7105, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2008, 710508 (13 October 2008); https://doi.org/10.1117/12.800378

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