青藏高原气温与印度洋海温遥相关的初步研究

利用1960—2000年青藏高原54个常规气象观测站的年平均地面气温资料,考察了高原气温的空间分布和气候变异特征;利用同期印度洋海温资料和奇异值分解方法,着重研究了青藏高原气温与印度洋海温之间的遥相关关系,并初步探讨了物理机制问题。分析结果表明:在空间分布上,青藏高原气温中部低,四周高,41年来呈逐步上升趋势,振幅不断加大;高原气温与印度洋海温之间存在显著的主要遥相关模态,这与印度洋海温异常激发遥相关波列影响到高原气温有关。

Primary Analyses of Teleconnection Relationship between the Qinghai-Xizang Plateau Air Temperature and the Indian Ocean SST

Using the annually temperature data of 54 observational stations over Qinghai-Xizang Plateau(QXP) in 1960-2000,the spatial distribution and climatic anomaly characteristics of temperature over QXP are investigated.The indian ocean sea surface temperature data at the same period and SVD method are used to study the teleconnection relationship between QXP air temperature and Indian ocean sea surface temperature,and their physical mechanism are primarily discussed.The results show that the temperature is lower in the middle of QXP and its surroundings is highter,the trend of QXP air temperature ascends year by year in recent 41 years.The teleconnection relationship between QXP air temperature abnormality and Indian Ocean SST is significant,which probably have something on correlative wave train forced by Indian Ocean SST through the main coupled relationship model.