| Regional difference of aridity/ humidity conditions change over China during the last thirty years |
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| 作者姓名： | YIN Yunhe WU Shaohong ZHENG Du YANG Qingye |
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| 作者单位： | [1]Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China [2]Graduate School of the Chinese Academy of Sclences.＇Beijing 100039, China [3]Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China （Grant No. 40171040）, the Knowledge Innovation Project of the Institute of Geographical Sciences and Natural Resources Research, CAS （Grant No. CXI0G-A02-03）, and the Director Foundation of Knowledge Innovation Project of CAS （Grant No. SJ 10G-A00-06）. |
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| 摘 要： | Scientists have found that the global average surface temperature has increased by 0.6±0.2℃ since the late 19th century based on various evidence1]. From the 1980s, temperature has experienced the most rapid warming to an extent of abrupt change statistically2,3]. Global warming has attracted extensive attention from multiple depart-ments and has been an important issue related to global politics. Many scientific communities have made great efforts on climate change research and global env…
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| 关 键 词： | 土壤水分蒸发损失总量 干旱现象 湿度 气候因素 |
| 收稿时间： | 2005-01-26 |
| 修稿时间： | 2005-01-262005-04-20 |
Regional difference of aridity/ humidity conditions change over China during the last thirty years |
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| YIN Yunhe WU Shaohong ZHENG Du YANG Qingye.Regional difference of aridity/ humidity conditions change over China during the last thirty years[J].Chinese Science Bulletin,2005,50(19):2226-2233. |
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| Authors: | Yunhe Yin Shaohong Wu Du Zheng Qingye Yang |
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| Institution: | (1) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, No. 11A, Datun Road, Chaoyang District, Beijing, 100101, China;(2) Policy Research Center for Environment and Economy, Ministry of Environmental Protection of the People’s Republic of China, No.1 Yuhui South Road, Beijing, 100029, China |
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| Abstract: | The meteorological data of 616 stations in China were used to calculate the potential evapotranspiration and aridity/humidity index by applying the modified FAO-Penman-Monteith model. Regional difference of trends in precipitation, potential evapotranspiration and aridity/humidity index over China and their interdecadal variations were analyzed from 1971 to 2000. The results show that all the four climatic factors trends have obvious regional difference and interdecadal variations. Annual precipitation during the 30-year period shows an increasing trend over most regions of China, with decreasing trends in potential evapotranspiration and aridity/humidity index. Most regions in China become more humid, especially significant in northern Xinjiang, eastern Tibet, western Sichuan, and northern Yunnan. The average value over China would mask the regional difference of climate change because of the complex environmental condition in China. Therefore regional difference should be analyzed to further understand climate change and its impacts. Both water supply and demand need to be considered when attempting to study regional aridity/humidity conditions. |
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| Keywords: | aridity/humidity conditions climate change regional difference potential evapotransplration Penman-Monteith model |
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