| 1950-2000年中国北方干旱气候变化 |
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| 引用本文： | 王志伟,翟盘茂,张洪涛.1950-2000年中国北方干旱气候变化[J].地理学报(英文版),2003,13(4):480-487. |
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| 作者姓名： | 王志伟 翟盘茂 张洪涛 |
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| 作者单位： | [1]ShanxiAgriculturalMeteorologyCenter,Taiyuan30002,China [2]NationalClimateCenter,Beijing100081,China |
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| 基金项目： | The Project of the Ministry of Science and Technology,No.2001BA611B-01，National Meteorological Center,ZK2002C-04 |
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| 摘 要： | Based on China‘s monthly precipitation data of 629 stations during 1950-2000, we calculated Z indices and separated them into seven Dryness and Wemess grades. Further, a drought area index was proposed to study changes in drought severity in northern China. The results revealed that the different severity of droughts all showed expanding trends in northern China‘s main agricultural area. Moreover, the area coverage of droughts in different seasons and different regions disolaved different trends.
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| 关 键 词： | 中国 北部地区 趋势 干旱 范围 气候变化 统计资料 降水资料 1950-2000年 |
| 收稿时间： | 1/9/2003 12:00:00 AM |
| 修稿时间： | 17 June 2003 |
Variation of drought over northern China during 1950–2000 |
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| Wang Zhiwei,Zhai Panmao,Zhang Hongtao.Variation of drought over northern China during 1950–2000[J].Journal of Geographical Sciences,2003,13(4):480-487. |
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| Authors: | Wang Zhiwei Zhai Panmao Zhang Hongtao |
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| Institution: | 1. Shanxi Agricultural Meteorology Center,Taiyuan 030002,China
2. National Climate Center,Beijing 100081,China |
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| Abstract: | Based on China's monthly precipitation data of 629 stations during 1950-2000, we calculated Z indices and separated them into seven Dryness and Wetness grades. Further, a drought area index was proposed to study changes in drought severity in northern China. The results revealed that the different severity of droughts all showed expanding trends in northern China's main agricultural area. Moreover, the area coverage of droughts in different seasons and different regions displayed different trends. |
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| Keywords: | northern China drought coverage trend |
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