| 春季北方气旋活动特征及其与中高纬海温场的关系 |
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| 引用本文： | 王艳玲,郭品文.春季北方气旋活动特征及其与中高纬海温场的关系[J].江西农业学报,2011(9):131-133,136. |
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| 作者姓名： | 王艳玲 郭品文 |
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| 作者单位： | 江苏海事职业技术学院;南京信息工程大学; |
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| 摘 要： | 利用近55年NCEP/NCAR再分析逐日海平面气压场资料以及太平洋月平均海温场和500 hPa月平均位势高度场资料,统计了春季北方气旋活动频数的时空变化特征,并分析了其与中高纬海温场和大气环流的关系。结果表明:春季北方气旋活动频繁,存在着明显的两个高值中心,分别位于蒙古国的中部和我国东北北部地区;春季北方气旋活动频数与前期的中高纬太平洋海温场有较好的相关性,尤其东亚气旋的移栖地阿拉斯加湾地区为很好的相关持续区,从上一年9月开始一直到当年2月始终维持显著的负相关;气旋活动特多年与特少年的前期关键区的海温存在显著差异,两种特征年前期海温异常对大气环流影响的累积效应到春季突出表现出来,在当年春季5,00 hPa高度场表现出明显的反相分布形势,而这种形势导致了纬向环流的减弱和增强,进而使得中纬的气旋性活动增加与减少。
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| 关 键 词： | 春季 北方气旋 活动频数 中高纬海温场 大气环流 |
Characteristics of Northern Cyclonic Activity in Spring and Its Relationship with Mid-high Latitude Sea Surface Temperature |
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| WANG Yan-ling,GUO Pin-wen.Characteristics of Northern Cyclonic Activity in Spring and Its Relationship with Mid-high Latitude Sea Surface Temperature[J].Acta Agriculturae Jiangxi,2011(9):131-133,136. |
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| Authors: | WANG Yan-ling GUO Pin-wen |
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| Institution: | WANG Yan-ling1,GUO Pin-wen2(1.Jiangsu Maritime Vocational Technical College,Nanjing 211170,China,2.Nanjing University of Information Science and Technology,Nanjing 210044,China) |
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| Abstract: | This paper statistically analyzed the characteristics of northern cyclonic activity in spring and its relationship with mid-high latitude sea surface temperature and general circulation by using the data of daily sea level pressure,monthly pacific sea surface temperature and monthly 500 hPa geopotential height provided by NCEP/NCAR reanalysis.The results showed that the northern cyclonic activity was frequent in spring,and it had two high value centres: in the middle part of Mongolia and in the northeast of... |
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| Keywords: | Spring Northern cyclone Activity frequency Mid-high latitude sea surface temperature General circulation |
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