Climate change features along the Brahmaputra Valley in the past 26 years and possible causes |
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| Authors: | Minhong Song Yaoming Ma Yu Zhang Maoshan Li Weiqiang Ma Fanglin Sun |
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| Institution: | 1.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou,China;2.Lanzhou,China;3.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing,China |
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| Abstract: | Through analyzing the changes of averaged temperature and precipitation along the Brahmaputra Valley from 1980 to 2005, and
investigating the correlation between atmospheric circulation indices and these changes, the respondence of the Brahmaputra
Valley to the global warming had been analyzed in this paper. It is found that the Brahmaputra Valley climate became warmer
and wetter from 1980 to 2005, and the change magnitude is higher than that over the whole Tibetan Plateau. Therefore, the
respondence of the Brahmaputra valley to the global warming is more evident than that of the whole plateau during the period.
The relationship between atmospheric circulation indices and the regional climate change is significant. When North Atlantic
Oscillation index is higher in summer, the climate of the Brahmaputra Valley becomes warmer and dryer; vice versa. When South
Oscillation index is higher, it becomes warmer and wetter; vice versa.Worthy of note, the results in this study only emphasize
some evidence of change in temperature and precipitation over the Brahmaputra Valley during 1980–2005. |
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