| 冬季太平洋SSTA对北太平洋风暴轴年际变化的影响 |
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| 作者姓名： | Zhu Weijun Sun Zhaobo Zhou Bing |
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| 作者单位： | Zhu Weijun，Sun Zhaobo Nanjing Institute of Meteorology，Nanjing 210044 Zhou Bing LASG，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029 |
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| 基金项目： | Sponsored by the China National Key Fundamental Research and Development Program
(G1998040901-3) and National Natural Science F |
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| 摘 要： | 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，冬季北太平洋风暴轴中心有线性增强、偏北、偏东的趋势。对15个冬季北太平洋风暴轴区域 500 hPa天气尺度滤波位势高度方差与同期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 ENSO区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，ENSO区海温异常可以通过激发500hPa高度场上的PNA遥相关型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通过激发 500 hPa高度场上的 WP遥相关型，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。
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| 关 键 词： | 风暴轴 年际变化 SVD分析 遥相关型 |
The Impact of Pacific SSTA on the Interannual Variability of Northern Pacific Storm Track during Winter |
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| Zhu Weijun,Sun Zhaobo,Zhou Bing.The Impact of Pacific SSTA on the Interannual Variability of Northern Pacific Storm Track during Winter[J].Advances in Atmospheric Sciences,2001,18(5):1029-1042. |
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| Authors: | Zhu Weijun Sun Zhaobo and Zhou Bing |
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| Institution: | Nanjing Institute of Meteorology, Nanjing 210044,Nanjing Institute of Meteorology, Nanjing 210044,LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | Investigation is conducted of the interannual variability of the northern Pacific storm track and its con current association with 500 hPa height and Pacific sea surface temperature (SST) during winter. Evidence suggests that during the studying period the center of the northern winter Pacific storm track experiences substantial interannual variability in the variation of its latitude, longitude and intensity. Singular value de composition (SVD) of 15 winter 500 hPa filtered geopotential height variance over the storm track with the tropical and northern Pacific SST shows that the first coupled mode depicts the effect on the track of SSTA over the equatorial central and eastern Pacific, while the second one reflects the impact of Kuroshio SSTA on the track. Further Composite analysis indicates, moreover, that the SSTA over Kuroshio (equatorial cen tral 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 track over its central and western (eastern) part. |
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| Keywords: | Storm track Interannnal variability SVD analysis Teleconnection pattern |
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