HR: 1330h
AN: OS32B-0242    [PDF]
TI: Measurements of Remote Sensing Reflectance in Chesapeake Bay Using In-situ and Satellite (MODIS) Observations
AU: * Tzortziou, M
EM: martz@carioca.gsfc.nasa.gov
AF: Dept. of Meteorology/ESSIC,UMCP, University of Maryland, College Park, MD 20742
AU: Subramaniam, A
EM: ajit@atmos.umd.edu
AF: ESSIC,UMCP, University of Maryland, College Park, MD 20742
AU: Herman, J
EM: herman@tparty.gsfc.nasa.gov
AF: NASA/GSFC, NASA/Goddard Space Flight Center, Code 916, Greenbelt, MD 20771
AU: Neale, P
EM: nealep@SI.EDU
AF: Smithsonian Environmental Research Center, SERC, P. O. Box 28, 647 Contees Wharf Road, Edgewater, MD 21037
AU: Gallegos, C
EM: gallegosc@si.edu
AF: Smithsonian Environmental Research Center, SERC, P. O. Box 28, 647 Contees Wharf Road, Edgewater, MD 21037
AU: Harding, L
EM: larry@hpl.umces.edu
AF: Center for Environmental Science, Horn Point Laboratory, UMD, University of Maryland, Box 775, 2020 Horns Point Road, Cambridge, MD 21613
AB: Obtaining accurate information on chlorophyll-a (Chl-a) concentration and dissolved organic material (DOM) composition in coastal waters, using remote sensing observations, is critical for primary production studies and carbon-cycling modeling. Since passive remote sensing relies on detecting the signal emerging from the oceans (water leaving radiance, nLw), it is of great significance to examine the accuracy of satellite water leaving radiances measured over coastal regions. In situ measurements of radiation fields and water optical properties were used to interpret satellite water-leaving radiance spectra measured by the Moderate Resolution Imaging Spectroradiometer (MODIS -Terra) over the estuarine waters of the northern mainstream of Chesapeake Bay. Good agreement between in-situ and MODIS data were obtained at longer wavelengths (488 nm and longer) including the spectral shape of the nLw values. There is a systematic problem at the shortest two MODIS wavelengths (412 and 443 nm) including a large percentage of negative or zero nLw values. The main issues that affect the accuracy of satellite estimations over such a highly complex estuarine environment (e.g. proximity to land mass, shallow waters, perturbed atmospheric conditions) were examined in this study.
DE: 1635 Oceans (4203)
DE: 1640 Remote sensing
DE: 4235 Estuarine processes
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting