| 广州盛夏高温频数异常分析 |
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| 引用本文： | 刘燕,程正泉,蔡安安.广州盛夏高温频数异常分析[J].热带气象学报,2006,22(6):553-559. |
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| 作者姓名： | 刘燕 程正泉 蔡安安 |
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| 作者单位： | 广州中心气象台,广东,广州,510080 |
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| 基金项目： | 广东省广州市中心气象台科研项目 |
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| 摘 要： | 运用EOF、相关分析等方法,分析了广州市1951-2004年高温频数的基本气候特征,并探讨了盛夏(7 -8月)高温频数异常与同期65-150°E,10-70°N范围内500 hPa高度场的关系。结果表明:(1)近54年来广州年平均出现高温次数为8．7日;5-9月都有高温出现,其中7、8月是高温的频发期;(2)广州市高温频数具有明显的年际和年代际变化,其中1980年代以来高温频数明显增加;(3)广州市盛夏高温频数在1980年代以来的异常增多是与同期我国西北部-蒙古-贝加尔湖及附近地区西风带活动减弱、中低纬副热带高压强度加强有密切的关系。
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| 关 键 词： | 高温频数 500 hPa高度场 相关 |
| 文章编号： | 1004-4965(2006)06-0553-07 |
| 收稿时间： | 2005-07-25 |
| 修稿时间： | 2005-12-18 |
ANALYSIS OF MID-SUMMER HIGH TEMPERATURE FREQUENCY ANOMALY IN GUANGZHOU |
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| LIU Yan,CHENG Zheng-quan and CAI An-an.ANALYSIS OF MID-SUMMER HIGH TEMPERATURE FREQUENCY ANOMALY IN GUANGZHOU[J].Journal of Tropical Meteorology,2006,22(6):553-559. |
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| Authors: | LIU Yan CHENG Zheng-quan and CAI An-an |
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| Institution: | Guangzhou Central Meteorological Observatory, Guangzhou 510080, China;Guangzhou Central Meteorological Observatory, Guangzhou 510080, China;Guangzhou Central Meteorological Observatory, Guangzhou 510080, China |
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| Abstract: | Using EOF, correlation analysis methods, the climatic characteristics are analyzed of the yearly Guangzhou high temperature frequency(HTF) during 1951-2004, and the relationship between the mid-summer (July and August) HTF anomaly and the 500 hPa heights of the region(65-150°E, 10-70°N) at the same time is also discussed. The results show that: (1) the average of HTF is 8.7 days per year in the recent 54 years in Guangzhou; high temperature occurs from May to September, and July and August have the largest frequency of occurrence; (2) there are distinct interannual and interdecadal changes in Guangzhou HTF, with an obvious increase since 1980s; (3) anomalous increase of mid-summer HTF in Guangzhou since the 1980's has a close relation with the weakened westerlies in Northwest China, Mongolia, Baikal and their vicinity and the intensified subtropical high in the mid-low latitude areas. |
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| Keywords: | high temperature frequency 500 hPa height correlation |
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