地球自转速度变化对副高脊线南北进退的作用

EFFECTS OF CHANGE IN SPEED OF THE EARTH’S ROTATION ON THE SOUTHWARD OR NORTHWARD MOVEMENT OF SUB-TROPICAL HIGH OVER WESTERN PACIFIC

摘要: 众所周知,西太平洋副热带高压脊线位置的南北进退与汛期影响我国的雨带位置南北移动有着密切的关系。江苏的预报员发现脊线位置达20°N左右时苏南梅雨开始。因此,副高脊线稳定通过20°N日期的长期预报是人们所关心的。然而对长期,尤其是以月和季为时间尺度的长期预报尚缺乏有效的方法。

Abstract: Based on the analysis of the theory and data, the result shows that the increasing speed of the earth rotation is corresponding to the ridge line northward movement of subtropical high over the western Pacific, and vice versa. The conclusions may be used for the long-range prediction of rain belt over China.