| 东亚地区北方气旋和南方气旋活动频数的时空特征 |
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| 引用本文： | 王艳玲,王黎娟.东亚地区北方气旋和南方气旋活动频数的时空特征[J].辽宁气象,2011(6):43-48. |
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| 作者姓名： | 王艳玲 王黎娟 |
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| 作者单位： | [1]江苏海事职业技术学院,江苏南京211170 [2]南京信息工程大学大气科学学院,江苏南京210044 |
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| 基金项目： | 高校博士点新教师基金课题（20093228120001）和江苏省“青蓝工程”共同资助. |
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| 摘 要： | 利用1953-2007年NCEP／NCAR再分析逐日海平面气压场资料，统计分析东亚地区北方气旋和南方气旋的时间和地域分布特征。结果表明：南、北气旋活动频数存在明显的年际和年代际变化，伴随着一次全球性的年代际气候跃变，20世纪80年代初期北方气旋活动频数出现了显著的突变。从月际分布可知，5月北方气旋频数最多，8月南方气旋频数最多；春季北方气旋活动频繁，存在着明显的两个高值中心，分另Ij位于蒙古国中部和中国东北地区北部；夏季南方气旋活动频繁，主要集中在中国东部沿海及日本南部海面。南北气旋活动频数的季节变化与大气环流的变化密切相关。相关统计结果可增加对东亚温带气旋活动规律的认识和了解，并为预测和预报提供参考。
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| 关 键 词： | 北方气旋 南方气旋 活动频数 东亚地区 |
Spatialtemporal characteristics of activity frequencies of northern cyclone and southern cyclone in East Asia |
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| WANG Yanling,WANG Lijuan.Spatialtemporal characteristics of activity frequencies of northern cyclone and southern cyclone in East Asia[J].Liaoning Meteorological Quarterly,2011(6):43-48. |
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| Authors: | WANG Yanling WANG Lijuan |
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| Institution: | 1. Jiangsu Maritime Institute, Nanjing 211170, China; 2. School of Atmospheric Science, Nanjing University of Information Science and Technology ,Nanjing 210044, China) |
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| Abstract: | Based on the NCEP/NCAR dally reanalysis sea level pressure field data from 1953 to 2007, the spatialtemporal characteristics of activity frequencies of northern cyclones and southern cyclones in East Asia were analyzed. The results show that there are obvious interannual and interdecadal variabihty for activity frequencies of northern cyclones and southern cyclones. With the interdecadal climatic jump in the global scale, activity frequencies of northern cyclones have an obviously abrupt change in 1980s. The most activity frequencies of northern cyclones and southern cyclones appear in May and in August, respectively. Northern cyclones are frequent in spring and have two obviously large values centers. The centers are located in the middle of Mongolia and the north of Northeast China,respectively. Southern cyclones are frequent in summer and they are mainly located in the sea regions of the east of China and the south of Japan. The seasonal variations of activity frequencies of southern cyclones and northern cyclones are related to atmospheric circulation. The relationally analytical results of this study could provide the references for knowing well the activity rules of extratropical cyclone in East Asia and forecasting cyclone activity. |
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| Keywords: | Northern cyclone Southern cyclone Activity frequency East Asia region |
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