| 安阳区域性夏季大旱成因分析 |
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| 引用本文： | 王安俊,葛相英,刘勤娣,王建新,彭云峰.安阳区域性夏季大旱成因分析[J].河南气象,2004(3):17-18. |
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| 作者姓名： | 王安俊 葛相英 刘勤娣 王建新 彭云峰 |
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| 作者单位： | [1]安阳市气象局，河南安阳455001 [2]平顶山市气象局，河南平顶山467001 |
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| 摘 要： | 利用1957～1998年安阳区域夏季降水资料，确定安阳区域性夏季大旱的标准，分析了大旱成因：东亚沿海低槽较常年异常深厚和偏东以及西太平洋副高异常偏东、偏南和偏弱；当年6～8月太阳黑子相对平均数处于谷点或从谷点开始上升时期；当年春季出现厄尔尼诺或存在厄尔尼诺现象，绝大部分安阳降水偏少或特少，出现干旱或大旱；6～8月西风急流轴异常偏北，也是造成安阳区域性夏季大旱的原因之一。
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| 关 键 词： | 大旱 厄尔尼诺 大气环流 太阳黑子 西风急流 |
Study on the Causes of Summer Heavy Drought over Anyang |
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| WANG An-jun,GE Xiang-ying,LIU Qin-di,WANG Jian-xin,PENG Yun-feng.Study on the Causes of Summer Heavy Drought over Anyang[J].Meteorology Journal of Henan,2004(3):17-18. |
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| Authors: | WANG An-jun GE Xiang-ying LIU Qin-di WANG Jian-xin PENG Yun-feng |
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| Institution: | WANG An-jun~1,GE Xiang-ying~1,LIU Qin-di~1,WANG Jian-xin~1,PENG Yun-feng~2 |
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| Abstract: | Utilizing the data of summer precipitation from 1957 to 1998, we define the criterion of heavy drought in Anyang area and analyze its causes: (1) the low pressure trough over east Asia coastland is abnormal deeper and easterner as well as the western Pacific subtropical high is abnormal easterner, southerner and weaker; (2)the sunspot relative average reaches bottom or just rises from there in June, July and August; (3)EL Nino appears or exists in the spring and the precipitation is so small that drought or heavy drought occurred in most parts of Anyang; (4)western jet stream is abnormal northerner. |
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| Keywords: | Criterion of heavy drought Causes of formation General circulation of atmosphere Sunspot El Nino Western jet stream |
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