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《Acta Geographica Sinica》 2001-06
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Change of Temperature in Tibetan Plateau From 1961 to 2000

DU Jun (Meteorological Bureau of Lhasa, Lhasa 850001; China)  
Using the data of monthly mean temperature, maximum and minimum temperature from 1961 to 2000 in Tibet, the linear trends of the annual and seasonal temperature are analyzed. The results show that, the mean temperature displayed warming trend in most parts of Tibet, especially in autumn and winter. The asymmetry was detectable in Tibet, the type of asymmetry was mainly the increase of Tmax and Tmin, while Tmin increase was bigger than that of Tmax. The increase of Tmax occurred mainly in summer and Tmin,, in winter. The decrease of daily temperature range (DTR) was in all seasons (except summer). Warming was displayed at all latitudes, the increase was the strongest in spring and autumn, secondly in winter, the trend was stronger on the higher altitude than on the lower altitude. In addition, the linear trend of the warming for annual mean temperature over Tibet during the past forty years indicated an increase of 0.26 0C / 10 a, it is obviously higher than in other parts of China and in the whole globe. There were more anomalous cold years in the 1 960s, whereas anomalous warm years in the 1990s.
【CateGory Index】: P423
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