东亚夏季波列经验正交函数分析

王亚非1,何金海2,李琰1,2

东亚夏季波列经验正交函数分析

王亚非1,何金海2,李琰1,2

中国气象科学研究院/灾害天气国家重点实验室,北京 100081;2. 南京信息工程大学,江苏南京 210044

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摘要

摘要: 利用经验正交函数作为分析工具，利用500 hPa高度场资料针对东亚地区波列出现情况进行研究，得出结论如下：（1）从东西伯利亚上游经鄂霍茨克海到日本东部海面的波列（OKJ波列）在初、仲夏（6—7月）的信号很强，为欧亚范围内最主要的分布类型。（2）从菲律宾经日本到北美的波列（P-J波列）可在整个夏季（6—8月）具有相当强的信号，虽然均表现为第二特征向量分布，贡献率与6—7月欧亚范围内第一特征向量表现OKJ波列的相当。（3）合成分析表明OKJ和P-J类波列在某种程度上可以共存。
- 东亚夏季波列 /
- 经验正交函数 /
- 遥相关 /
- 500hPa

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[1]

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