用风廓线资料分析热带气旋“帕布”的风场结构

使用香港风廓线资料，进行时空转换，得到热带气旋“帕布”近香港时的水平和垂直风场剖面结构：气旋近地面层风场以径向风为主；气旋东西两侧水平风场结构明显不同，东侧偏东风明显，西侧随高度增加切向风不断增强，并监测到东北风急流的向下传播；尽管两侧风场结构不同，水平风速却表现出较好的对称性，但气旋西侧由于急流的存在，风速总体较东侧高；近中心上升气流明显偏于中心西侧，下沉气流总体较上升气流要强，且更对称。

Wind Field Structure of the Tropical Cyclone Pabuk by Means of Wind Profiler Data

In this paper, to better analyze the wind field structure of the tropical cyclone Pabuk, the horizontal and vertical cross - section structures of Pabuk when approaching Hong Kong are obtained by means of time - to - space conversion of the wind profiler data from Hong Kong. It is found that the near surface wind field is featured by radial wind, and that the east and west parts of the cyclone differ greatly in wind field structure. On the east side, easterly wind prevails while on the west side tangential wind strengthens with height accompanied by downward transmission of northeastern jet stream. Despite the difference in wind field structure, the two sides are symmetric in horizontal wind speed undulation except for higher wind speed on the west side due to the effect of jet stream. It is also found that near the cyclone center, ascending flow significantly deviates to the west while descending flow is stronger and more of symmetriy than ascending flow.