| 澳洲冷空气活动的季节内和年际变化特征 |
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| 引用本文： | 刘向文,孙照渤,倪东鸿,邓伟涛,曾刚,谭桂容.澳洲冷空气活动的季节内和年际变化特征[J].南京气象学院学报,2009,32(1):24-31. |
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| 作者姓名： | 刘向文 孙照渤 倪东鸿 邓伟涛 曾刚 谭桂容 |
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| 作者单位： | 1. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044;中国气象局,国家气候中心,北京,100081
2. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044 |
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| 基金项目： | 国家自然科学基金，江苏省气象灾害重点实验室资助项目 |
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| 摘 要： | 用澳洲850 hPa上空的变温和温度权重相结合的冷空气活动日数定义了澳洲冷空气活动指标（cold air index,CAI）,据CAI分析了澳洲冷空气活动的季节内和年际变化特征,结果表明：澳洲西南部地区是冷空气活动的关键区,5月其收缩于澳洲西南角,7月和8月其中心及影响范围均向北移动,主要分布区向澳洲东部伸展;整个冬季（6—8月）的澳洲冷空气活动没有显著的年际差异,而5—8月各月的冷空气活动却存在明显的年际变化特征。
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| 关 键 词： | 澳洲冷空气 冷空气活动指标 季节内变化 年际变化 |
Intraseasonal and Interannual Features of Australian Cold Air Activity |
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| LIU Xiang-wen,SUN Zhao-bo,NI Dong-hong,DENG Wei-tao,ZENG Gang,TAN Gui-rong.Intraseasonal and Interannual Features of Australian Cold Air Activity[J].Journal of Nanjing Institute of Meteorology,2009,32(1):24-31. |
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| Authors: | LIU Xiang-wen SUN Zhao-bo NI Dong-hong DENG Wei-tao ZENG Gang TAN Gui-rong |
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| Affiliation: | 1.Key Laboratory of Meteorological Disaster of Ministry of Education;NUIST;Nanjing 210044;China;2.National Climate Center;China Meteorological Administration;Beijing 100081;China |
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| Abstract: | A cold air index(CAI) is defined as the cold air activity days weighted with respect to the temperature and 24 h temperature change at 850 hPa over Austrilia.The intraseasonal and interannual features of Australian cold air activity are studied using CAI.Results show that the key region of cold air activity is located in the southwest of Australia in May,and its center and influence range display a gradual northward shift in July and August with the main activity region expanding towards the east part of Au... |
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| Keywords: | Australian cold air index of cold air activity intraseasonal variation interannual variation |
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