Comparison of spectral feature algorithms for remote sensing of chlorophyll in eutrophic lakes

Algorithms to calculate chlorophyll (chl) concentrations of phytoplankton were tested over a range from 0.9 to 47 μg chl L^-1 in Mono Lake, California. During four surveys on the lake, samples for determination of chlorophyll were collected and continuous spectra from 400 to 800 nm were obtained with a hand-held spectroradiometer. Remote sensing reflectances were calculated from these spectra. The reflectance peak at 689 nm and the reflectance maximum around 689 mm ratioed to the reflectance maximum around 560 nm predicted chlorophyll concentrations well (r², 0.94 for both)