西北太平洋一個(gè)超強(qiáng)爆發(fā)性氣旋的分析
[Abstract]:Using the CFSv2 (Climate Forecast System Version 2) data provided by NCEP (National Centers for Environmental Prediction) and the infrared band albedo data of MTSAT-1R (Multi-functional Transport Satellites-1R) satellite provided by Kaozhi University of Japan, A super explosive cyclone occurred in the Northwest Pacific in January 2013 was studied. the structural characteristics of the explosive cyclone were analyzed in detail by means of weather analysis and diagnostic analysis. It is found that the cyclone is located on the north side of the upper jet in the later stage of explosive development, and the strong divergence at high altitude is beneficial to the development of the cyclone. The low pressure trough of 500hPa over the cyclone deepened significantly on the 14th 12UTC, and the positive vorticity advection in front of the trough was beneficial to the decrease of sea level pressure. The cold front accompanied by the cyclone has a nasal structure. Below 800hPa, the pseudo-equivalent potential temperature decreases with the height, and the lower atmosphere is convolution unstable. The vortex equation is used to diagnose and analyze the cyclone. It is found that the convolution term and the stretching term are the main contribution items to the variation of cyclone vorticity. The region around the center of the cyclone 15 (擄) 脳 15 (擄) is designed. It is found that there is a positive feedback process for the circulation along the four sides of the region at different times, the average area non-adiabatic heating in the region, the divergence of water vapor flux and the vertical velocity. That is, there is a positive feedback mechanism similar to CISK in the early stage of cyclone explosive development.
【作者單位】: 中國海洋大學(xué)海洋與大氣學(xué)院;
【基金】:國家自然科學(xué)基金項(xiàng)目(41275049)資助~~
【分類號(hào)】:P732.3
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