Activities of Low-Frequency Waves in the Tropical Atmosphere and ENSO |
| |
| Authors: | Li Guilong and Li Chongyin LASG |
| |
| Institution: | Li Guilong and Li Chongyin LASG,Institute of Atmospheric Physics,CAS,Beijing 100080 |
| |
| Abstract: | ENSO, particularly the occurrence of ENSO is still an important research object in climatic variation. Using the ECMWF data, the relationship between ENSO and the activities of low-frequency waves in the tropical atmosphere is analyzed in this paper. It is shown that the occurrence of ENSO is closely related to the intraseasonal oscillation and the quasi-stationary waves (the period >90 days) in the tropical atmosphere. Associated with the occurrence of El Nino event, the kinetic energy of low-frequency waves has obvious variation: the kinetic energy of atmospheric intraseasonal (30-60 days) oscillation (ISO) decreases abruptly and the kinetic energy of quasi-stationary waves increases abruptly. Moreover, the ISO and quasi-stationary waves propagate eastward clearly corresponding to El Nino; but they clearly propagate westward in La Nina cases. |
| |
| Keywords: | Intraseasonal oscillation El Nino/Southern Oscillation Quasi-stationary wave |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
|
