| ENSO事件发展的时空特征 |
| |
| 引用本文： | 张秋庆,黄荣辉.ENSO事件发展的时空特征[J].大气科学,1993,17(4):395-402. |
| |
| 作者姓名： | 张秋庆 黄荣辉 |
| |
| 作者单位： | 国家海洋局海洋环境预报中心，中国科学院大气物理研究所 北京 100081，北京 100080 |
| |
| 摘 要： | 本文利用1951—1988年10°S—50°N太平洋SST资料与EOF分析方法对ENSO事件的发展过程与循环的时空特征进行了分析.分析结果表明EOF第一主分量时间系数的变化可以很好地表示SST距平变化与ENSO事件的发生.并且,第一主分量空间函数分布的变化揭示了一种ENSO事件增温是春季首先始于赤道东太平洋沿岸,随后向西传播到赤道中太平洋的增温过程;而第二主分量空间函数分布的变化揭示了另一种ENSO事件可增温首先始于赤道中太平洋,然后向东传播到赤道东太平洋的增温过程.分析结果还表明,ENSO事件的强度是强弱相间,其周期平均大约为4年左右. 本文还比较了80年代热带太平洋SST的变化及所发生的两次ENSO事件与其它年代所发生的ENSO事件的差别.
|
| 关 键 词： | ENSO事件 太平洋SST EOF分析 |
Temporal and Spatial Features in ENSO Evolution |
| |
| Zhang Qiuqing and Huang Ronghui.Temporal and Spatial Features in ENSO Evolution[J].Chinese Journal of Atmospheric Sciences,1993,17(4):395-402. |
| |
| Authors: | Zhang Qiuqing and Huang Ronghui |
| |
| Abstract: | By using the Pacific SST data from 1951 to 1988 and the Empirical Orthogonal Function (EOF) analysis method, the temporal and spatial features in ENSO evolution have been analysed. The results show that the temporal variations of SST anomalies and the occurences of ENSO events. Seasonal variations of spatial patterns of the first EOF disclose a type of processes of SST warming in ENSO evolution, i.e., the rising of SST occurs first along the coast of the eastern equatorial Pacific in spring, and then propagates westward to the central equatorial Pacific. Seasonal variations of spatial patterns of the second EOF disclose another type of SST warming processes,in which the rising of SST occurs first in the central equatorial Pacific, and then graduately propagates eastward to the eastern equatorial Pacific.The analyses results also show that the strong and weak ENSO events always occurs alternately since the 1950s. Their averaged period is about four years.A comparison of the SST varaitions as well as the two ENSO events in the 1980s with those in other years is also shown. |
| |
| Keywords: | ENSO events Pacific SST data EOF analysis |
| 本文献已被 CNKI 维普 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》下载全文 |
|
