| 云南5月雨量的多尺度变化及与其相联系的大气环流异常 |
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| 引用本文： | 万云霞,程建刚,陈新梅,孙绩华,严华生.云南5月雨量的多尺度变化及与其相联系的大气环流异常[J].气象科学,2007,27(5):543-548. |
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| 作者姓名： | 万云霞 程建刚 陈新梅 孙绩华 严华生 |
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| 作者单位： | 云南省专业气象台,昆明,650034;云南省气象局,昆明,650034;云南省气象科学研究所,昆明,650034;云南大学大气科学系,昆明,650091 |
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| 摘 要： | 本文运用小波分析和功率谱分析方法对云南5月雨量的多尺度时间演变特征进行了分析,结果表明,云南5月雨量具有明显的年际和年代际变化特征。对与这两种时间尺度相关联的大气环流异常进行了分析,发现两者具有显著的差异。云南5月雨量的年际变化与冰岛低压、欧洲槽、南亚高压、中西太平洋ITCZ以及孟湾附近的低压系统的变化有着密切的关系,云南5月雨量的年代际-气候态变化与热带各系统的强度、乌山脊、阿留申低压关系密切。
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| 关 键 词： | 5月雨量 多尺度 大气环流 |
| 收稿时间： | 2005-10-10 |
| 修稿时间： | 2006-07-29 |
MULTI-SCALE VARIATION ON PRECIPITATION IN MAY IN YUNNAN AND THEIR CORRESPONDING ATMOSPHERIC GENERAL CIRCULATION |
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| Wan Yunxi,Cheng Jiangang,Chen Xinmei,Sun Jihua and Yan Huasheng.MULTI-SCALE VARIATION ON PRECIPITATION IN MAY IN YUNNAN AND THEIR CORRESPONDING ATMOSPHERIC GENERAL CIRCULATION[J].Scientia Meteorologica Sinica,2007,27(5):543-548. |
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| Authors: | Wan Yunxi Cheng Jiangang Chen Xinmei Sun Jihua and Yan Huasheng |
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| Institution: | 1. Yunnan Meteorology Observatory, Kunming 650034;2 .Yunnan Meteorology Bureaus, Kunming 650034;3. Yunnan Institute of Meteorological Sciences, Kunming 650034;4 Department of Atmospheric Science, Yunnan University, Kunming 650091 |
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| Abstract: | Wavelet analysis and power spectrum method are used to analyze the multi-scale variation on precipitation in May in Yunnan.The results show that the variations of precipitation in May is characterized by both at interannual and interdecadal scales.Composition analysis shows that the physical mechanism of the interannual and interdecadial variation of precipitation in May in Yunnan are different,the former is closely related to Icelandic low,Eurasian trough,South Asia high,ITCZ in middle west Pacific Ocean and low system near Bay of Bengal;the latter is correlative to various tropic systems,Ural ridge and Aleutian low. |
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| Keywords: | Precipitation in May Interannual and interdecadal variation Atmospheric circulation |
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