Study On The Influence Of Taiwan Island Terrain On Typhoon

In this paper, a total of four types of typhoon trails are obtained from the tropical cyclone yearbook data compiled by the China Meteorological Administration in 2000 and 2014. There are four types of typhoon trails: westward path, northwest path, diversion path and special path, and for these four types of typhoon paths The 15 years of typhoon classification and analysis.Aiming at the typhoon of the No. 1410 typhoon "Meidemu", which has a great influence on the terrain, the "Maeem" typhoon is affected by the terrain of the central mountain range in Taiwan, and in the stage of its rapid weakening , There has been a large increase in heavy rain. In this paper, the influence of the land surface process parameterization scheme and the terrain resolution on the typhoon simulation of the "Meadem" model is taken into account, and the thermal diffusion scheme, Unified Noah land-surface model, RZ land-surface model, Pleim-Xiu Land Surface Model, and the numerical simulation results of terrain resolution of 5m, 2m and 30s were obtained, and a suitable numerical simulation scheme was obtained. At last, WRF model is used to study the topography of the central Taiwan mountain range in Taiwan Typhoon Typhoon "Matmo" in 2014, and the terrain of the island of Taiwan after the Typhoon"Matmo" Intensity and distribution of wind and rain. The results show that the real terrain can better simulate and reproduce the development process of Typhoon"Matmo".Taiwan Central Mountain terrain on the landing of the "Matmo" Typhoon has a substantial impact on the path to reduce the height of the Taiwan terrain test led to the typhoon track to the southwest deflection, The height of the terrain changes to the northeast, and the degree of terrain height is positively related to the degree of path deflection. The interaction between typhoon circulation and large scale circulation is the main cause of path deflection.The change of terrain height in Taiwan has obvious effect on the typhoon intensity. The increase or decrease of terrain height in Taiwan will weaken the typhoon intensity, which is due to the dynamic narrow-tube effect, cloud matter distribution and convective movement related; The mechanism of Taiwan terrain's effect on typhoon precipitation is more complicated. It is not only related to typhoon-induced typhoon intensity and structure change, but also with the terrain-induced convective activity and spatio-temporal distribution of spiral cloud and peripheral cloud related.