| 印度洋偶极子与热带太平洋海洋表面温度异常多时间尺度相互作用初析 |
| |
| 引用本文： | 肖莺,张祖强,何金海,等.印度洋偶极子与热带太平洋海洋表面温度异常多时间尺度相互作用初析[J].大气科学,2010,34(3):483-494. |
| |
| 作者姓名： | 肖莺 张祖强 何金海 等 |
| |
| 作者单位： | 武汉区域气候中心,武汉,430074;国家气候中心,北京,100081;南京信息工程大学,南京,210044;国家气候中心,北京,100081;南京信息工程大学,南京,210044;武汉区域气候中心,武汉,430074 |
| |
| 基金项目： | 国家重点基础研究发展规划项目2006CB403606 |
| |
| 摘 要： | 本文利用交叉谱方法, 将印度洋偶极子 (简称IOD) 与ENSO的相关关系分解到不同的时间尺度上来分析, 进而通过对海气耦合过程的初步分析, 讨论了不同时间尺度上IOD与ENSO的相互作用。结果表明, IOD与ENSO在准1～2年、 准3年、 准4年等三个时间尺度上存在显著相关, 同时, IOD还存在一个独立于ENSO的模态, 主要表现在准8个月时间尺度上。从海气相互作用的角度看, 在与ENSO相关的三个特征时间尺度上, IOD年际变率主要通过引发热带印度洋纬向风异常并且东传到太平洋, 从而引起热带中东太平洋海温的年际变率。与ENSO相对独立的IOD模态则没有类似的纬向风异常东传过程。此外, 在上述四个不同时间尺度上, 产生IOD变率的印度洋海气耦合过程不尽相同, 各具特点。
|
| 关 键 词： | 印度洋偶极子 ENSO 交叉谱 |
Multi-Scale Interactions between the Indian Ocean Dipole and the Tropical Pacific Sea Surface Temperature Anomalies |
| |
| XIAO Ying,ZHANG Zuqiang,HE Jinhai and et al.Multi-Scale Interactions between the Indian Ocean Dipole and the Tropical Pacific Sea Surface Temperature Anomalies[J].Chinese Journal of Atmospheric Sciences,2010,34(3):483-494. |
| |
| Authors: | XIAO Ying ZHANG Zuqiang HE Jinhai and |
| |
| Institution: | 1.Wuhan Regional Climate Center, Wuhan,430074; National Climate Center, Beijing,100081; Nanjing Information and Technology University, Nanjing,2100442.National Climate Center, Beijing,1000813.Nanjing Information and Technology University, Nanjing,210044 |
| |
| Abstract: | Spatial and temporal characteristics of the Indian Ocean Dipole (IOD) and the relationship between the variabilities of IOD and ENSO at several interannual time scales are addressed. It is found that the interannual variability of IOD is associated with that of ENSO significantly at the time scales of quasi-1—2 years, quasi-3 years, and quasi-4 years. Besides, IOD also exhibits a robust variation at the quasi-8-month time scale which appears to be independent on the ENSO. At the three interannual time scales mentioned above, the IOD contributes to the interannual variations of ENSO through the westward shifts of zonal wind anomalies associated with the IOD over the tropical Indian Ocean into the tropical Pacific Ocean. The similar process is not found for the quasi-8-month mode of IOD. In addition, the ocean-atmosphere interactions in the tropical Indian Ocean responsible for the interannual variations of IOD are different at the four different time scales. |
| |
| Keywords: | the Indian Ocean Dipole (IOD) ENSO cross spectrum |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《大气科学》浏览原始摘要信息 |
| 点击此处可从《大气科学》下载免费的PDF全文 |
|
