Airborne remote sensing of chlorophyll distributions in Mono Lake, California

摘要

As part of a long-term investigation of seasonal and interannual variations of plankton in Mono Lake (California), we developed a methodology using airborne imaging spectrometry to synoptically measure chlorophyll concentrations. Images of Mono Lake were acquired with NASA's Airborne Visible and Infrared Imaging Spectrometer (AVIRIS) and were atmospherically corrected by applying a version of the radiative transfer model MODTRAN. Using a predictive equation for calculation of chlorophyll based on a band ratio of remote sensing reflectances (R { rs}; R { rs} 490 nm/R { rs} 550 nm), spatial distributions of chlorophyll throughout the lake were determined; broad east to west gradients in chlorophyll and gyres are evident.