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Assimilation analysis of Rammasun typhoon structure over Northwest Pacific using satellite data

机译:利用卫星数据对西北太平洋拉玛孙台风结构的同化分析

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摘要

The kinetic and thermodynamic structure of typhoon Rammasun (No. 0205) over the Northwest Pacific-has been analyzed, using NOAA-16 polar orbiting Advanced Microwave Sounding Unit (AMSU) data collected on 2 July, 2002. The three-dimensional variational(3DVAR) assimilation technology is used to assimilate the satellite observation. The results show that the characteristics of the 3D typhoon structure can be more reasonably described from the assimilated data. The warm-cored structure of the typhoon isenhanced in the analyzed field, which corresponds to strong typhoon. The typhoon cyclonic circulation in the middle and lower layers is apparently strengthened, and the strong anti-cyclonic circulation appears at the top of the typhoon. The water vaporand its supply in the typhoon arc enhanced. The microwave assimilation data may be used to supply the lack of the conventional observation data over the tropical ocean.
机译:利用2002年7月2日收集的NOAA-16极地轨道先进微波探测单元(AMSU)数据,分析了西北太平洋台风Rammasun(0205)的动力学和热力学结构。三维变分(3DVAR) )同化技术用于同化卫星观测。结果表明,从同化数据可以更合理地描述3D台风结构的特征。在分析场中,台风的暖芯结构得到了增强,这与强台风相对应。中下层台风的气旋环流明显增强,台风顶部出现强烈的反气旋环流。水蒸气及其在台风弧中的供应增加。微波吸收数据可以用来弥补热带海洋上常规观测数据的不足。

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