摘要
本文通过在IAP-GCM上实现的数值模拟,研究了大气对赤道东太平洋地区暖SSTA的响应,着重讨论了大气遥响应的性质和演变过程. 数值模拟清楚地表明,大气对异常外源的响应主要是一种具有30—60天周期的低频遥响应.分析不同地区和不同季节这种强迫响应的30—60天低频振荡的结构及活动,可以清楚看到它与大气中实际存在着的30—60天振荡极为相似.因此也可以认为,大气对海温异常的强迫遥响应是激发产生全球大气30—60天振荡的重要机制.
Based on the numerical simulation experiment completed in IAP-GCM , the atmospheric response to the warm SSTA in the equatorial eastern pacific has been studied . Furthermore , the evolution' of the atmospheric teleresponse are discussed .The results indicated that the atmospheric response to this anomalous heating source is mostly dominated by the low- frequency teleresponse with a period of 30 - 60 day . For different regions and seasons, the structure and activity of this 30 - 60 day oscillation caused by the external forcing are very similar to that of the real atmospheric 30 - 60 day oscillation. Therefore , we can suggest that the anomalous SST in the tropical ocean is one of the important mechanisms to cause 30 - 60 day oscillation in the global atmosphere .
出处
《大气科学》
CSCD
北大核心
1992年第6期707-717,共11页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金
关键词
大气
数值模拟
低频振荡
遥响应
30-60 day oscillation
Low-frequency teleresponse
Wave- train
Band pass- filter .
