Natural Resources, School of


Date of this Version



Published in Proceeding of the Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment. DOI: 10.1109/IGARSS.1993.322290. Copyright 1993, IEEE. Used by permission. Pages 485-487, volume 2.


Reflectance spectra from 400 to 750 nm were measured in Lake Kinneret, when low phytoplankton stock prevailed, with chlorophyll concentrations from 3.1 to 7.3 μg/l. Algorithms for estimation of chlorophyll (CHL) concentration were devised using reflectances in the blue and green region of the spectrum and natural solar induced fluorescence. The fluorescence was calculated either from the reflectance height above a baseline drawn between 650 and 715 nm or between 670 and 730 nm, and also from the sum of reflectance above the base line through 670 and 730 nm. This paper presents experimental evidence showing that fluorescence can be successfully used as indicator of CHL content.