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Rain-season trends in precipitation and their effect in different climate regions of China during 1961–2008

Journal article
Authors Yanling Song
Christine Achberger
Hans W. Linderholm
Published in Environmental Research Letters
Volume 6
Issue 3
Pages 1-8
Publication year 2011
Published at Department of Earth Sciences
Pages 1-8
Language en
Links dx.doi.org/10.1088/1748-9326/6/3/03...
Subject categories Climate Research, Meteorology and Atmospheric Sciences

Abstract

Using high-quality precipitation data from 524 stations, the trends of a set of precipitation variables during the main rain season (May–September) from 1961 to 2008 for different climate regions in China were analysed. However, different characteristics were displayed in different regions of China. In most temperate monsoon regions (north-eastern China), total rain-season precipitation and precipitation days showed decreasing trends; positive tendencies in precipitation intensity were, however, noted for most stations in this region. It is suggested that the decrease in rain-season precipitation is mainly related to there being fewer rain days and a change towards drier conditions in north-eastern China, and as a result, the available water resources have been negatively affected in the temperate monsoon regions. In most subtropical and tropical monsoon climate regions (south-eastern China), the rain-season precipitation and precipitation days (11–50, with > 50 mm) showed slightly positive trends. However, precipitation days with ≤ 10 mm decreased in these regions. Changes towards wetter conditions in this area, together with more frequent heavy rainfall events causing floods, have a severe impact on peoples' lives and socio-economic development. In general, the rain-season precipitation, precipitation days and rain-season precipitation intensity had all increased in the temperate continental and plateau/mountain regions of western China. This increase in rain-season precipitation has been favourable to pasture growth.

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