Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Verification of patch- and regional-scale energy balance estimates derivedfrom microwave and optical remote sensing during SGP97
Autore:
Kustas, WP; Jackson, TJ; French, AN; MacPherson, JI;
Indirizzi:
ARS, USDA, Hydrol & Remote Sensing Lab, Beltsville, MD 20705 USA ARS Beltsville MD USA 20705 Remote Sensing Lab, Beltsville, MD 20705 USA Natl Res Council Canada, Inst Aerosp Res, Ottawa, ON, Canada Natl Res Council Canada Ottawa ON Canada Aerosp Res, Ottawa, ON, Canada
Titolo Testata:
JOURNAL OF HYDROMETEOROLOGY
fascicolo: 3, volume: 2, anno: 2001,
pagine: 254 - 273
SICI:
1525-755X(2001)2:3<254:VOPARE>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL-WATER CONTENT; ESTIMATING SURFACE FLUXES; BARE-SOIL; SENSED DATA; HYDROLOGY EXPERIMENT; VEGETATION INDEXES; SEQUENTIAL ASSIMILATION; PENMAN-MONTEITH; AREA INDEX; WASHITA 92;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
69
Recensione:
Indirizzi per estratti:
Indirizzo: Kustas, WP ARS, USDA, Hydrol & Remote Sensing Lab, Bldg 007,BARC W, Beltsville, MD 20705 USA ARS Bldg 007,BARC W Beltsville MD USA 20705 ville, MD 20705 USA
Citazione:
W.P. Kustas et al., "Verification of patch- and regional-scale energy balance estimates derivedfrom microwave and optical remote sensing during SGP97", J HYDROMETE, 2(3), 2001, pp. 254-273

Abstract

The 1997 Southern Great Plains Hydrology Experiment (SGP97) was designed and conducted to extend surface soil moisture retrieval algorithms based on passive microwave observations to coarser resolutions, larger regions with more diverse conditions, and longer time periods. The L-band ElectronicallyScanned Thinned Array Radiometer (ESTAR) on an airborne platform was used for daily mapping of surface soil moisture over an area of approximately 40km x 260 km for a 1-month period. Results showed that the soil moisture retrieval algorithm performed the same as in previous investigations, demonstrating consistency of both the retrieval and the instrument. This soil moisture product at 800-m pixel resolution together with land use and fractional vegetation cover information is used in a remote sensing model for computing spatially distributed fluxes over the SGP97 domain. Validation of the model output is performed at the patch scale using tower-based measurements and at regional scale using aircraft flux observations. Comparisons at the patch scale yielded discrepancies between model- and tower-based sensible and latent heat fluxes of 40% and 20%, respectively. At regional scales, differences between modeled and aircraft-based sensible and latent heat fluxeswere less, on the order of 30% and 15%, respectively. A preliminary comparison of regional average energy fluxes with a model using remotely sensed temperatures was conducted and yielded good agreement. The utility of spatially distributed energy flux and model- simulated surface temperature maps over the SGP97 region is discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 11:42:31