摘要
应用无基本气流的无辐散正压模式研究热带气旋的水平尺度对其移动的影响。水平尺度较小的（较大的）热带气旋向西北偏北（西北偏西）移动。水平尺度较小的（较大的）热带气旋使其大尺度β涡旋逆时针旋转一个较小的（较大的）角度αｌ。热带气旋的移向θｃ与角度αｌ有关，即θｃ≈３６０°－αｌ。因此，热带气旋的移向随其水平尺度的增大而逆时针向西偏转。
The effect of tropical cyclone horizontal scale on its motion is investigated in a nondivergent, barotropic model with no basic flow. The tropical cyclone whose horizontal scale is smaller (larger) moves toward the northwest by north (the northwest by west). The asymmetric flow of the smaller (larger) tropical cyclone causes the large scale beta gyres to countercloockwise rotate a smaller (larger) angle α l . The moving direction of tropical cyclone θ c is related to the angle α l , i.e., θ c≈360°-α l . Therefore, the moving direction of tropical cyclone counterclockwise deflects to the west with the increasing of horizontal scale.
出处
《南京气象学院学报》
CSCD
1998年第3期411-417,共7页
Journal of Nanjing Institute of Meteorology
基金
南京气象学院科研基金
关键词
热带气旋
水平尺度
移动影响
气旋
tropical cyclone, horizontal scale, effect, motion
