Decreasing potential evapotranspiration in the Huanghe River Watershed in climate warming during 1960–2010

Auteur(s) et Affiliation(s)

MA, X.

College of Geography and Environment Science, Northwest Normal Univ., Lanzhou, Chine

ZHANG, M.

College of Geography and Environment Science, Northwest Normal Univ., Lanzhou, Chine

LI, Y.

College of Geography and Environment Science, Northwest Normal Univ., Lanzhou, Chine

WANG, S.

College of Geography and Environment Science, Northwest Normal Univ., Lanzhou, Chine

MA, Q.

College of Geography and Environment Science, Northwest Normal Univ., Lanzhou, Chine

LIU, W.

College of Geography and Environment Science, Northwest Normal Univ., Lanzhou, Chine

Description :
According to the meteorological observation data of 72 stations from 1960 to 2010 in the Huanghe (Yellow) River Watershed, China, the long-term variations of potential evapotranspiration, calculated in the modified Penman-Monteith model were presented, as well as the meteorological causes for the decrease of potential evapotranspiration were discussed. Since 1960, temperature has risen significantly and potential evapotranspiration a decreasing trend, which indicated the existence of Evaporation paradox in the Huanghe River Watershed. Calculated in multiple regressions, the contribution to potential evapotranspiration change of related meteorological factors was discussed, including mean pressure, maximum and minimum temperature, sunshine hours, relative humidity and average wind speed. The decrease of wind speed in the Huanghe River Watershed may be the dominating factor causing potential evapotranspiration decreasing.

Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2012, vol. 22, n°. 6, p. 977-988, nombre de pages : 12, Références bibliographiques : 48 ref.

Date :
2012

Editeur :
Pays édition : Chine

Langue :
Anglais