冬季赤道中东太平洋区域海表温度异常对北太平洋风暴轴年际变化的影响

朱伟军; 孙照渤; 闵锦忠; 彭加毅

冬季赤道中东太平洋区域海表温度异常对北太平洋风暴轴年际变化的影响

南京气象学院, 江苏, 南京, 210044

基金项目: 国家自然科学基金49475258资助项目

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出版历程
- 收稿日期: 1998-12-01
- 修回日期: 1999-04-19

INFLUENCE ON NORTHERN PACIFIC STORM TRACK OF EQUATORIAL CENTRAL AND EASTERN PACIFIC SSTA DURING WINTER

Nanjing Institute of Meteorology, Nanjing 210044, China

摘要

摘要: 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太平洋海表温度进行了奇异值分解(SVD)分析,结果表明,SVD得到的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。进一步的合成分析显示,赤道中、东太平洋区域海表温度异常可以通过激发或加强500 hPa高度场上的 PNA遥相关型,主要影响冬季北太平洋风暴轴的东西摆动及其中、东端的强度变化。
- 风暴轴 /
- 年际变化 /
- SVD分析 /
- 遥相关型
Abstract: Singular value decomposition (SVD) is conducted of 15 winter tropical Pacific SST with 500 hPa filtered potential height variance over the northern Pacific storm track. It is shown that the first coupled mode obtained depicts the effect on the track of SSTA over equatorial central and eastern Pacific. Further Composite analysis indicates that the SSTA over there during winter can give rise to or invigorate PNA teleconnection response pattern in 500 hPa height field which, in turn, exerts crucial influence on the interannual variability in vigor and east-west displacement of the Pacific storm track, especially over its central and eastern part.
- storm track /
- interannual variability /
- SVD analysis /
- teleconnection pattern

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参考文献(16)

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