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Trend of estimated actual evapotranspiration over China during 1960-2002
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft- och vattenlära. (Hydrologi)
2007 (engelsk)Inngår i: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 112, nr D11, s. D11120-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this study, the water balance methodology introduced by Thornthwaite and Mather (1955) is modified to estimate monthly actual evapotranspiration for 686 stations over China during 1960–2002. The modification is done by replacing the Thornthwaite potential evapotranspiration estimation with the Penman-Monteith method. Temporal trend and spatial distribution of the estimated annual actual evapotranspiration during the past 43 years are analyzed. The results show that (1) the actual evapotranspiration had a decreasing trend in most areas east of 100°E, and there was an increasing trend in the west and the north parts of northeast China; (2) the spatial distribution of the trend for the actual evapotranspiration is similar to that of the potential evapotranspiration in south China, while the trends are opposite in north China; (3) for most parts of China, the change in precipitation played a key role for the change of estimated actual evapotranspiration, while in southeast China, the change of potential evapotranspiration appeared to be the major factor; and (4) in general, the hydrological cycle was intensified in western China, whereas it was weakened from the Yellow River basin northward.

sted, utgiver, år, opplag, sider
2007. Vol. 112, nr D11, s. D11120-
Emneord [en]
actual evapotranspiration, trend, water balance model, Thornthwaite, Penman-Monteith method, China
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-15368DOI: 10.1029/2006JD008010ISI: 000247369300002OAI: oai:DiVA.org:uu-15368DiVA, id: diva2:43139
Tilgjengelig fra: 2008-02-12 Laget: 2008-02-12 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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