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Titolo:
Does grazing affect regional climate?
Autore:
Eastman, JL; Coughenour, MB; Pielke, RA;
Indirizzi:
Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA ColoradoState Univ Ft Collins CO USA 80523 Sci, Ft Collins, CO 80523 USA Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA Univ New Mexico Albuquerque NM USA 87131 Biol, Albuquerque, NM 87131 USA Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA Colorado State Univ Ft Collins CO USA 80523 Lab, Ft Collins, CO 80523 USA
Titolo Testata:
JOURNAL OF HYDROMETEOROLOGY
fascicolo: 3, volume: 2, anno: 2001,
pagine: 243 - 253
SICI:
1525-755X(2001)2:3<243:DGARC>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEAF-AREA INDEX; NORTHERN AFRICA; MODELING SYSTEM; SIMULATION; VEGETATION; PHOTOSYNTHESIS; MIDHOLOCENE; FEEDBACKS; RESPONSES; PLANT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Eastman, JL Colorado State Univ, Dept Atmospher Sci, Foothills Campus, Ft Collins, CO 80523 USA Colorado State Univ Foothills Campus Ft Collins CO USA 80523 A
Citazione:
J.L. Eastman et al., "Does grazing affect regional climate?", J HYDROMETE, 2(3), 2001, pp. 243-253

Abstract

Before European settlement, the Great Plains of the United States contained vast herds of bison. These bison altered the landscape through their grazing. Measurement data of the disturbance that such grazing could produce, when scaled for the large population of bison, were used with a coupled atmospheric-ecosystem model to evaluate the likely effect that this grazing hadon the growing season weather in the Great Plains. A dynamically coupled meteorological and plant growth model was used to investigate the regional atmospheric conditions over a single growing season. A 50-km horizontal meshwas implemented, covering the central plains of the United States. The modeling system was then integrated, with a time step of 90 s, for a period covering 1 April 1989 through 31 August 1989 using boundary conditions obtained from an objective analysis of gridded archive data. This integration wasperformed with and without grazing to assess the effects on regional atmospheric and biological processes. The grazing algorithm was employed to represent presettlement North American bison and was switched on and off for different simulations. The results indicated a cooling response in daily maximum temperatures to removal of grazing. The opposite trends were found for the minimum daily temperature. It was also found that grazing produced significant perturbations in the hydrological cycle.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 07:15:00