| 中国华东地区夏季高温的时空特征和年际变化 |
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| 引用本文： | 林昕,管兆勇.中国华东地区夏季高温的时空特征和年际变化[J].南京气象学院学报,2008,31(1):1-9. |
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| 作者姓名： | 林昕 管兆勇 |
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| 作者单位： | 南京信息工程大学,大气科学学院,江苏,南京,210044;南京信息工程大学,江苏省气象灾害重点实验室,江苏,南京,210044 |
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| 基金项目： | 江苏省六大人才高峰基金
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江苏省气象灾害重点实验室基金 |
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| 摘 要： | 利用中国华东地区1961-2004年夏季（7-8月）气温观测资料，分析了该区域夏季气温的总体变化特征，指出华东地区夏季气温具有降低的长期趋势。定义3项判别标准，得出该区域44a来有10个异常高温夏季。旋转经验正交函数（REOF）展开表明，华东地区夏季平均气温场可分为3个区域：北区气温在21世纪初有明显上升，中区和南区气温无显著突变；各区域气温以2a、3～4a的周期振荡为主；20世纪90年代以来，异常高温年出现频繁。
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| 关 键 词： | 华东地区 热夏 旋转经验正交函数(REOF) |
| 文章编号： | 1000-2022（2008）01-0001-09 |
| 收稿时间： | 2006-12-05 |
| 修稿时间： | 2007-03-30 |
Temporal-Spatial Characters and Interannual Variations of Summer High Temperature in East China |
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| LIN Xin,GUAN Zhao-yong.Temporal-Spatial Characters and Interannual Variations of Summer High Temperature in East China[J].Journal of Nanjing Institute of Meteorology,2008,31(1):1-9. |
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| Authors: | LIN Xin GUAN Zhao-yong |
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| Institution: | LIN Xin ,GUAN Zhao-yong ( 1. School of Atmospheric Sciences,NUIST,Nanjing 210044,China; 2. Jiangsu Key Laboratory of Meteorological Disaster,NUIST,Nanjing 210044,China) |
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| Abstract: | The observational temperature data （July--August, JA）from 1961 to 2004 in East China have been used to analyze the interannual variations of regional summer temperature anomalies related to the hot summer events in the present article, and the descending trend of the summer temperature has been found. Three criterions for defining hot summers have been set up,and 10 hot summers in the recent 44 years have been indentified. The JA mean temperature field in East China can be divided into three subdivisions with the rotated empirical orthogonal function （REOF） method. The analyses of the climatic catastrophic features as well as periodicities for each subdivision show that there are no significant temperature changes in these subdivisions except the northern subdivision where summer temperature has obviously increased in the 21 st century. The periods of both 2 yrs and 3--4 yrs are found to dominate in any one of the three subdivisions. |
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| Keywords: | East China hot summer rotated empirical orthogonal function （REOF） |
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