| 冬季北太平洋风暴轴的年际变化及其与500hPa高度以及热带和北太平洋海温的联系 |
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| 引用本文： | 朱伟军,孙照渤.冬季北太平洋风暴轴的年际变化及其与500hPa高度以及热带和北太平洋海温的联系[J].Acta Meteorologica Sinica,2000,58(3):309-320. |
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| 作者姓名： | 朱伟军 孙照渤 |
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| 作者单位： | 南京气象学院,南京,210044 |
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| 基金项目： | 国家自然科学基金!49475258 |
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| 摘 要： | 文中研究了冬季北太平洋风暴轴的年际异常及其与500hPa高度以及热带和北太平洋海温的联系。结果发现，各年冬季北太平洋风暴轴的中心强度和位置具有显著的年际差异。对15个冬季北太平洋风暴轴区域500hPa天气尺度滤波位势高度方差与热带和北太平洋海温的SVD分析表明，第一对空间典型分布反映了赤道中、东太平洋区域海温异常对风暴轴年际变化的影响，而第二对空间典型分布反映了黑潮区域海温异常对风暴轴年际变化的影响。进一步的合成分析显示，赤道中、东太平洋区域海温异常主要影响冬季北太平洋风暴轴的东西摆动和中、东端的强度变化，而黑潮区域海温异常则主要影响冬季北太平洋风暴轴中、西端的强度变化和南北位移。并且这种影响分别与500hPa高度场上的PNA遥相关型和WP遥相关型有密切联系。
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| 关 键 词： | 风暴轴 年际变化 SVD分析 ENSO 遥相关型 |
| 收稿时间： | 1998/11/27 0:00:00 |
| 修稿时间： | 1999/1/26 0:00:00 |
INTERANNUAL VARIABILITY OF NORTHERN WINTER PACIFIC STORM TRACK AND ITS ASSOCIATION WITH 500 HPA HEIGHT AND TROPICAL AND NORTHERN PACIFIC SEA SURFACE TEMPERATURE |
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| Zhu Weijun and Sun Zhaobo.INTERANNUAL VARIABILITY OF NORTHERN WINTER PACIFIC STORM TRACK AND ITS ASSOCIATION WITH 500 HPA HEIGHT AND TROPICAL AND NORTHERN PACIFIC SEA SURFACE TEMPERATURE[J].Acta Meteorologica Sinica,2000,58(3):309-320. |
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| Authors: | Zhu Weijun and Sun Zhaobo |
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| Institution: | Nanjing Institute of Meteorology, Nanjing, 210044;Nanjing Institute of Meteorology, Nanjing, 210044 |
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| Abstract: | Investigation is conducted of the interannual variability of northern Pacific storm track and its association with 500 hPa height and tropical and northern Pacific sea sur-face temperature (SST)during winter. Evidence suggests that during the studying period the northern winter Pacific storm track center experiences substantial interannual vari-ability in variation of its latitude,longitude and intensity. Singular value decomposition (SVD)of 15 winter 500 hPa filtered potential height variance over the storm track with tropical and northern Pacific SST shows that the first coupled mode depicts the effect on the track of SSTA over equatorial central and eastern Pacific,while the second one re-flects the impact of Kuroshio SSTA on the track. Further composite analysis indicates,moreover, that the SSTA over Kuroshio (equatorial central and eastern Pacific) during winter, which is relative to WP (PNA) teleconnection response pattern in 500 hPa height field respectively,exerts crucial influence on the interannual variability in vigor and meridianal (zonal) displacement of the central and western (eastern)part of Pacific storm track. |
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| Keywords: | Storm track Interannual variability SVD analysis ENSO Teleconnection pattern |
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