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Titolo:
Evapotranspiration from a wetland complex on the Arctic coastal plain of Alaska
Autore:
Mendez, J; Hinzman, LD; Kane, DL;
Indirizzi:
Univ Alaska Fairbanks, Water & Environm Res Ctr, Fairbanks, AK 99775 USA Univ Alaska Fairbanks Fairbanks AK USA 99775 Ctr, Fairbanks, AK 99775 USA
Titolo Testata:
NORDIC HYDROLOGY
fascicolo: 4-5, volume: 29, anno: 1998,
pagine: 303 - 330
SICI:
0029-1277(1998)29:4-5<303:EFAWCO>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENERGY-BALANCE; WATER-BALANCE; HUDSON-BAY; EVAPORATION; TUNDRA; LAKE; FLUX; CLIMATE; CANADA; SNOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Mendez, J Univ99775ka Fairbanks, Water & Environm Res Ctr, POB 755860, Fairbanks, AK Univ Alaska Fairbanks POB 755860 Fairbanks AK USA 99775 anks, AK
Citazione:
J. Mendez et al., "Evapotranspiration from a wetland complex on the Arctic coastal plain of Alaska", NORD HYDROL, 29(4-5), 1998, pp. 303-330

Abstract

Evapotranspiration (ET) from an arctic coastal wetland near Prudhoe Bay, Alaska, was studied during the summers between 1994 and 1996. The purpose ofthe study was to compare different ET models and to gain a better understanding of evapotranspiration from arctic wetlands. The models used to obtainET from the watershed were the Bowen ratio energy balance (BREB), Priestley-Taylor (PT), Penman-Monteith (PM), Penman Combination (PC), energy balance (EB), water balance (WB), and WE based on Time Domain Reflectometry (TDR). For one of the ponds, evaporation determined by the EB, PT, PC, BREB, WE,and the aerodynamic (AD) methods were also compared. ET during the summer snow-free period for the watershed averaged 1.45 mm/day obtained via the BREB model. Evaporation from all ponds after spring snowmelt averaged 3.11 mm/day (obtained via the WE). Evaporation rate from ponds was on average twice that of the tundra as a whole. Latent heat flux was the dominant energy sink in wetlands and ponds, whereas sensible heat flux dominated in the drier upland area. The PT and PM models compared well to the BREB (used as the standard of comparison for ET) for 1994 and 1995, once parameters were properly calibrated using 1996 data. The BREB compared well with independent values of ET from the water balance and eddy correlation methods. For the pond, the EB, BREB, WE, PT,and AD methods gave very similar evaporation results for the summer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 19:18:57