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Titolo:
Properties of the water column and bottom derived from Airborne Visible Infrared Imaging Spectrometer (AVIRIS) data
Autore:
Lee, Z; Carder, KL; Chen, RF; Peacock, TG;
Indirizzi:
Univ S Florida, Dept Marine Sci, St Petersburg, FL 33701 USA Univ S Florida St Petersburg FL USA 33701 ci, St Petersburg, FL 33701 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
fascicolo: C6, volume: 106, anno: 2001,
pagine: 11639 - 11651
SICI:
0148-0227(20010615)106:C6<11639:POTWCA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
COASTAL OCEANIC ENVIRONMENTS; GENERALIZED RATIO ASSUMPTION; SHALLOW WATERS; MODEL; CHLOROPHYLL; BATHYMETRY; COLOR; CALIBRATION; REFLECTANCE; ABSORPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, Z Univ S Florida, Dept Marine Sci, 140 7Th Ave S, St Petersburg, FL 33701 USA Univ S Florida 140 7Th Ave S St Petersburg FL USA 33701 L 33701 USA
Citazione:
Z. Lee et al., "Properties of the water column and bottom derived from Airborne Visible Infrared Imaging Spectrometer (AVIRIS) data", J GEO RES-O, 106(C6), 2001, pp. 11639-11651

Abstract

Using Airborne Visible Infrared Imaging Spectrometer (AVIRIS) data as an example, we show in this study that the properties of the water column and bottom of a large, shallow area can be adequately retrieved using a model-driven optimization technique. The simultaneously derived properties include bottom depth, bottom albedo, and water absorption and backscattering coefficients, which in turn could be used to derive concentrations of chlorophyll, dissolved organic matter, and suspended sediments in the water column. The derived bottom depths were compared with a bathymetry chart and a boat survey and were found to agree very well. Also, the derived bottom albedo image shows clear spatial patterns, with end-members consistent with sand and seagrass. The image of absorption and backscattering coefficients indicatesthat the water is quite horizontally mixed, Without bottom corrections, chlorophyll a retrievals were similar to 50 mg m(-3), while the retrievals after bottom corrections were tenfold less, approximating real values. These results suggest that the model and approach used work very well for the retrieval of subsurface properties of shallow-water environments even for rather turbid environments like Tampa Bay, Florida.

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Documento generato il 30/05/20 alle ore 15:25:25