| 全球各类旱区的成因分析 |
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| 引用本文： | 汤懋苍,江灏,柳艳香,郭维栋.全球各类旱区的成因分析[J].中国沙漠,2002,22(1):1-5. |
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| 作者姓名： | 汤懋苍 江灏 柳艳香 郭维栋 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000 |
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| 基金项目： | 中国科学院寒区旱区环境与工程研究所创新课题（课题号：CACX210058）资助 |
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| 摘 要： | 利用ＮＣＥＰ再分析降水资料划出了三类旱区：Ａ、副热带旱区；Ｂ、亚洲内陆旱区；Ｃ、其他小块旱区。分析了各旱区的成因。研究表明：①高原夏季风与其北面的行星西风之间的反气旋切变是亚洲旱区形成的更重要的原因； ②大陆热低压西边的“高纬风”使对流层中、下层出现下沉辐散气流，是副热带旱区干旱的根本原因； ③低纬旱区的成因主要是冷洋流和上涌流。
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| 关 键 词： | 干旱区 气候 大气环流 下沉气流 |
| 文章编号： | 1000-694(2002)01-0001-05 |
| 修稿时间： | 2000年11月1日 |
Cause Analysis of Arid Region Formation on the World |
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| TANG Mao-cang,JIANG Hao,LIU Yan-xiang,GUO Wei-dong.Cause Analysis of Arid Region Formation on the World[J].Journal of Desert Research,2002,22(1):1-5. |
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| Authors: | TANG Mao-cang JIANG Hao LIU Yan-xiang GUO Wei-dong |
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| Abstract: | Based on the NCEP reanalysis precipitation data, three kinds of arid region are plotted out: A as subtropical arid regions, B as inland arid regions in Asia and C as other small arid regions. The causes to form arid regions are analyzed and the results show as follows: The anticyclonic shear between plateau monsoon and planetary west wind is more important cause to form the Asia arid region. The sinking divergence air current resulted from high-latitude wind in the west to continental thermal depression is the ultimate cause to form subtropical arid region. The primary causes forming low-latitude arid region are cold ocean current and upwelling current. |
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| Keywords: | arid region climate general circulation sinking air current |
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