| 1971-2000年青藏高原气候变化趋势 |
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| 引用本文： | 吴绍洪,尹云鹤,郑度,杨勤业.1971-2000年青藏高原气候变化趋势[J].地理学报(英文版),2007,17(2):141-151. |
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| 作者姓名： | 吴绍洪 尹云鹤 郑度 杨勤业 |
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| 作者单位： | [1]Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China [2]Institute of Tibetan Plateau Research, CAS, Beijing 100085, China |
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| 基金项目： | National Natural Science Foundation of China, No.40171040; Key Project of National Natural Science Foundation of China, No.40331006 Acknowledgement： The authors would like to thank the National Climatic Data Center of China Meteorological Administration （CMA） for providing climatic data for this study. |
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| 摘 要： | Trends of annual and monthly temperature, precipitation, potential evapotranspi- ration and aridity index were analyzed to understand climate change during the period 1971–2000 over the Tibetan Plateau which is one of the most special regions sensitive to global climate change. FAO56–Penmen–Monteith model was modified to calculate potential evapotranspiration which integrated many climatic elements including maximum and mini- mum temperatures, solar radiation, relative humidity and wind speed. Results indicate gen- erally warming trends of the annual averaged and monthly temperatures, increasing trends of precipitation except in April and September, decreasing trends of annual and monthly poten- tial evapotranspiration, and increasing aridity index except in September. It is not the isolated climatic elements that are important to moisture conditions, but their integrated and simulta- neous effect. Moreover, potential evapotranspiration often changes the effect of precipitation on moisture conditions. The climate trends suggest an important warm and humid tendency averaged over the southern plateau in annual period and in August. Moisture conditions would probably get drier at large area in the headwater region of the three rivers in annual average and months from April to November, and the northeast of the plateau from July to September. Complicated climatic trends over the Tibetan Plateau reveal that climatic factors have nonlinear relationships, and resulte in much uncertainty together with the scarcity of observation data. The results would enhance our understanding of the potential impact of climate change on environment in the Tibetan Plateau. Further research of the sensitivity and attribution of climate change to moisture conditions on the plateau is necessary.
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| 关 键 词： | 青藏高原 气候变化趋势 20世纪晚叶 总蒸发 环境影响 |
| 收稿时间： | 28 December 2006 |
| 修稿时间： | 2006-12-282007-02-11 |
Climatic trends over the Tibetan Plateau during 1971–2000 |
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| Wu?Shaohong,Yin?Yunhe,Zheng?Du,Yang?Qinye.Climatic trends over the Tibetan Plateau during 1971–2000[J].Journal of Geographical Sciences,2007,17(2):141-151. |
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| Authors: | Wu Shaohong Yin Yunhe Zheng Du Yang Qinye |
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| Institution: | 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;Institute of Tibetan Plateau Research, CAS, Beijing 100085, China
2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
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| Abstract: | Trends of annual and monthly temperature, precipitation, potential evapotranspiration and aridity index were analyzed to understand climate change during the period 1971-2000 over the Tibetan Plateau which is one of the most special regions sensitive to global climate change. FAO56-Penmen-Monteith model was modified to calculate potential evapotranspiration which integrated many climatic elements including maximum and minimum temperatures, solar radiation, relative humidity and wind speed. Results indicate generally warming trends of the annual averaged and monthly temperatures, increasing trends of precipitation except in April and September, decreasing trends of annual and monthly potential evapotranspiration, and increasing aridity index except in September. It is not the isolated climatic elements that are important to moisture conditions, but their integrated and simultaneous effect. Moreover, potential evapotranspiration often changes the effect of precipitation on moisture conditions. The climate trends suggest an important warm and humid tendency averaged over the southern plateau in annual period and in August. Moisture conditions would probably get drier at large area in the headwater region of the three rivers in annual average and months from April to November, and the northeast of the plateau from July to September. Complicated climatic trends over the Tibetan Plateau reveal that climatic factors have nonlinear relationships, and resulte in much uncertainty together with the scarcity of observation data. The results would enhance our understanding of the potential impact of climate change on environment in the Tibetan Plateau. Further research of the sensitivity and attribution of climate change to moisture conditions on the plateau is necessary. |
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| Keywords: | climatic trend evapotranspiration Penman-Monteith Tibetan Plateau China |
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