| 中国干旱和半干旱带的10年际演变特征 |
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| 引用本文： | 马柱国,符淙斌.中国干旱和半干旱带的10年际演变特征[J].地球物理学报,2005,48(3):519-525. |
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| 作者姓名： | 马柱国 符淙斌 |
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| 作者单位： | 中国科学院东亚区域气候-环境重点实验室,中国科学院大气物理研究所东亚中心,北京,100029;中国科学院东亚区域气候-环境重点实验室,中国科学院大气物理研究所东亚中心,北京,100029 |
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| 基金项目： | 国家重大基础研究规划项目 (19990 43 40 5 )，国家自然科学基金面上项目 (4 0 3 75 0 2 8)共同资助 |
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| 摘 要： | 利用Thornthwaite的干湿分类函数，对近100年中国干旱和半干旱区界限的10年际变动特征进行了分析.结果发现：近50年，在东北中部和华北北部，干旱和半干旱边界呈波动式东移，有明显向东扩展的趋势；在华北南部和陕西南部，半干旱边界也呈波动式南扩，其中陕西南部半干旱边界向南扩展的范围最大.近100年，10年际的干旱和半干旱边界也呈波动式摆动且存在向东和向南扩展的趋势，但在华北南部与东北中部两个地区以20世纪20年代前后干旱和半干旱的范围最大、最强.干旱和半干旱分界线的位置变化与区域升温和降水减少密切相关.
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| 关 键 词： | 干旱和半干旱 干湿分类函数 10年际 降水和气温 |
| 文章编号： | 0001-5733(2005)03-0519-04 |
| 收稿时间： | 2003-11-18 |
| 修稿时间： | 2004-10-24 |
Decadal variations of arid and semi-arid boundary in China |
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| MA Zhu-Guo,FU Cong-Bin.Decadal variations of arid and semi-arid boundary in China[J].Chinese Journal of Geophysics,2005,48(3):519-525. |
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| Authors: | MA Zhu-Guo FU Cong-Bin |
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| Institution: | Chinese Academy of Sciences Key Laboratory of Regional Climate Environment Research for Temperate East Asia, START TEA for East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Decadal variations of arid and semi-arid boundary in China during last 100 years have been analyzed by using Thornthwaite's method. The results indicate that, during the last 50 years, there is a distinguished periodic variation of arid and semi-arid boundary in their locations in the middle part of northeast China and northern part of central northern China, and an obvious trend moving to east. In south part of Shannxi province and central northern China, the boundaries of arid and semi-arid areas have been moving to the south, and there is also a periodic variation in the locations, the boundary of semi-arid area reaches the largest extent to the south. During the last 100 years, there is a trend of the boundaries moving to the south or east, and in the south part of northern China and the central part of northeast China, the extent and intensity of arid and semi-arid area was the largest and severest in the 1920s. The location variation of arid and semi-arid boundaries is closely related to regional warming and precipitation reduction. |
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| Keywords: | Arid and semi-arid Classification function of wet/dry Decadal variation Precipitation and temperature |
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