热带风暴“米克拉”异常路径特征及原因分析

Analysis of Characteristics of Abnormal Route of Tropical Storm ′MEKKHALA′ and its Formation

利用高空和地面常规资料、地转引导气流及热带风暴受力平衡中各力的分解,对"米克拉"异常路径进行分析,指出东移的西风槽影响着副高的进退,热带风暴移动路径主要受大型气压梯度力所牵引,并在台风内力作用下右偏于地转引导气流方向;热带风暴沿着高空正涡度的长轴移动。

Analyze the abnormal route of ′MEKKHALA′ on the basis of conventional data on upper level and the surface, leading air current by the earth running and decomposing of forces in loading balance of tropical storms. The results prove that the eastward moving trough has an effect on the advance and retreat of subtropical high belt,and the moving route of the tropical storm is mainly drawn by largesized air pressure gradient force, inclining to the leading air current direction of the earth running under the action of Typhoon internal force. The tropical storm moves along the long axis of upper level positive eddy.