Journal of Geographical Sciences ›› 2013, Vol. 23 ›› Issue (2): 195-207.doi: 10.1007/s11442-013-1003-0

• Research Articles •    下一篇

Modeled effects of climate change on actual evapotranspiration in different eco-geographical regions in the Tibetan Plateau

YIN Yunhe, WU Shaohong, ZHAO Dongsheng, ZHENG Du, PAN Tao   

  1. Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China
  • 收稿日期:2012-09-18 修回日期:2012-10-17 出版日期:2013-02-20 发布日期:2013-02-20
  • 作者简介:Yin Yunhe,Ph.D and Associate Professor,specialized in water and energy balance in land surface system and climate change.E-mail:yinyh@igsnrr.ac.cn
  • 基金资助:

    The "Strategic Priority Research Program" of the Chinese Academy of Sciences,No.XDA05090304;Project for Public Service from Ministry of Environmental Protection of China,No.201009056;National Key Technology Research and Development Program,No.2009BAC61B05

Modeled effects of climate change on actual evapotranspiration in different eco-geographical regions in the Tibetan Plateau

YIN Yunhe, WU Shaohong, ZHAO Dongsheng, ZHENG Du, PAN Tao   

  1. Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China
  • Received:2012-09-18 Revised:2012-10-17 Online:2013-02-20 Published:2013-02-20

摘要:

From 1981 to 2010,the effects of climate change on evapotranspiration of the alpine ecosystem and the regional difference of effects in the Tibetan Plateau(TP)were studied based on the Lund-Potsdam-Jena dynamic vegetation model and data from 80 meteorological stations.Changes in actual evapotranspiration(AET)and water balance in TP were analyzed.Over the last 30 years,climate change in TP was characterized by sig- nificantly increased temperature,slightly increased precipitation,and decreased potential evapotranspiration(PET),which was significant before 2000.AET exhibited increasing trends in most parts of TP.The difference between precipitation and AET decreased in the south- eastern plateau and increased in the northwestern plateau.A decrease in atmospheric water demand will lead to a decreased trend in AET.However,AET in most regions increased be- cause of increased precipitation.Increased precipitation was observed in 86%of the areas with increased AET,whereas decreased precipitation was observed in 73%of the areas with decreased AET.

关键词: evapotranspiration, LPJ model, climate change, Tibetan Plateau

Abstract:

From 1981 to 2010,the effects of climate change on evapotranspiration of the alpine ecosystem and the regional difference of effects in the Tibetan Plateau(TP)were studied based on the Lund-Potsdam-Jena dynamic vegetation model and data from 80 meteorological stations.Changes in actual evapotranspiration(AET)and water balance in TP were analyzed.Over the last 30 years,climate change in TP was characterized by sig- nificantly increased temperature,slightly increased precipitation,and decreased potential evapotranspiration(PET),which was significant before 2000.AET exhibited increasing trends in most parts of TP.The difference between precipitation and AET decreased in the south- eastern plateau and increased in the northwestern plateau.A decrease in atmospheric water demand will lead to a decreased trend in AET.However,AET in most regions increased be- cause of increased precipitation.Increased precipitation was observed in 86%of the areas with increased AET,whereas decreased precipitation was observed in 73%of the areas with decreased AET.

Key words: evapotranspiration, LPJ model, climate change, Tibetan Plateau