| 摘要: |
| 利用SCSA(奇异交叉谱分析)方法,对中低纬海气及中低纬环流相互作用的耦合同期信号进行分析。结果表明;在3－7年尺度上海气相互作用关系密切,这个尺度与ENSO循环尺度基本一致,且其振荡行为与ENSO根荡相似．从这个意义上说在中低纬海气相互作用中,ENSO是个强信号;中低纬环流相互作用存在10－12年及准4年的优势耦合周期,其中准4年振荡和ENSO循环尺度相一致．这说明中低纬环流相互作用,除受ENSO影响外,自身还存在10年左右的振荡周期。 |
| 关键词: 奇异交叉谱分析 海气相互作用 准10年振荡 ENSO |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金49575261 |
|
| SINGULAR CROSS SPECTRUM APPLIED ON DIAGNOSTIC ANALYSIS OF AIR-SEA INTERACTION |
|
Zhu Yanfeng1, Ding Yuguo2, He Jinhai2
|
|
1.Chinese Academy of Meteorological Sciences, Beijing, 100081;2.Nanjing Institute of meteorology
|
| Abstract: |
| The Singular Cross Spectrum Analysis (SCSA) method was employed to investigate the coupling periods of air-sea/mid-low circulation interaction using 1951-1993 500hPa and the seasurface temperature(SST) in the Nortern Hemisphere. Results show tha air-sea corrlation is noticeable on the 3-7 years scale,which is similar to ENSO circle. In this sense ENSO is a strongsignal; Quasi-ten/quasi-four year periods are prominent in the mid-low interaction, and quasifour year oscillation is uniform with the ENSO circle. Studys indicate that the mid-low interactionpossesses quasi-ten year oscillation apart from being affected by ENSO. |
| Key words: Cross Singular Spectrum Analysis Air-sea interaction Quasi-ten year oscillation ENSO |
