南海夏季风活动与季内北太平洋副高的形态和西伸

基金项目: 国家自然科学基金(No.49975012)资助

THE SOUTH CHINA SEA SUMMER MONSOON AND THE SEASONAL MODALITY AND WEST-EXTENDING OF THE NORTHERN HEMISPHERE PACIFIC SUBTROPICAL HIGH

1.
Institute Of Meteorology, PLA University Of Sciences &Technology, Nanjing 211101, China
2.
Department Of Atmospheric Sciences, Nanjing University, Nanjing 210093, China

摘要: 基于db1小波基和shannon熵的4层小波包分解重构及NCEP/NCAR逐日再分析资料,研究讨论了南海夏季风与季内北太平洋副高东西形态和西伸过程的相关特征,提出和定义了诊断判别副高活动的夏季风小波包频域能量判据,揭示出南海夏季风低频扰动与太平洋副高形态活动之间的一些新的现象和关联。
- 太平洋副高 /
- 南海夏季风 /
- 小波包 /
- 频域能量判据
Abstract: Based on the 4-layer db1 wavelet packet and shannon entropy decomposition/reconstruction method and the NCEP/NCAR daily reanalysis data set,the correlation between the South China Sea summer monsoon and the Northern Hemisphere Pacific subtropical high seasonal modality/shift was studied and discussed,and a corresponding summer monsoon frequency-band energy criterion was defined and introduced for diagnosing the Pacific subtropical high's modality/shift. A few new phenomena and correlation between the South China Sea summer monsoon and the Northern Hemisphere Pacific subtropical high were also revealed and presented.
- the Pacific subtropical high /
- South China Sea summer monsoon /
- wavelet packet /
- frequency-band energy criterion

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