【摘要】 应用谱分析的方法,讨论了热带太平洋、印度洋和大西洋海温对西太平洋副高西伸脊点的影响,得出热带太平洋、印度洋、大西洋海温变化对西伸脊点有影响的最佳落后时间长度.分别找出三大洋在上述落后时间长度下对西伸脊点东退和西伸有影响的关键区域.它可以作为西伸脊点东退或西伸的强信号因子,并对上述区域进行比较分析.西太平洋副高西伸脊点可以作为衡量东亚季风的一个指数,而东亚季风对处于低纬高原的云南的天气和气候有很大的影响.更多还原

【Abstract】 <Abstrcat>The effect of the SSTA(Sea Surface Temperature Anomaly) of the tropical Pacific,Indian and Atlantic Oceans on the western end of the ridge of the subtropical high of Atlantic is discussed by spectrum analysis,and the optimum time-lags and the key sector of the three oceans corresponding to them are found,wich is regarded as the strong signal of west-moving or east-moving of the western end of the ridge.The western end of the ridge of the subtropical high of Atlantic can be regarded as an index of East-Asian monsoons,which have great influence on weather and climate of Yunnan Province in the low latitude plateau.更多还原