摘要
在不同的SST年代际背景下,东亚季风和ENSO事件的关系是不同的。中国东部降水异常在冷态和暖态下,不是简单的线性反相关关系。在冷态时,最大的正距平中心发生在第二年早夏的长江以南地区;在暖态时,发生在第二年冬春季的华南地区。气温变化与降水变化并不对应,高温高湿的相关性不明显。不同的年代际海温背景使海气交换发生变化,改变了海陆热力对比,从而改变了海陆气压差,也就改变了季风的强度,使ENSO和东亚季风的关系发生变化。
The relationship between the east Asian monsoon(EAM) and ENSO events is different on the different interdecadal background in SST fields. The largest anomaly center of precipitation locats in the south side of the Changjiang river in the next summer of ENSO events on the cold SST interdecadal background, with its counterpart in the Huanan area in the next Spring on the warm background. The temperature variation is not corresponding to the rainfall. The interdecadal background of SST affects the air sea heat flux exchange and the thermal contrast between land and ocean, thus changing the monsoon intensity and the relation of ENSO and EAM.
出处
《南京气象学院学报》
CSCD
1998年第4期615-623,共9页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金
关键词
年代际背景
中国
东部气候
气候异常
厄尔尼诺
Interdecadal background, ENSO, climate of eastern China, east Asian monsoon