Himawari-8 is a next-generation geostationary meteorological satellite launched by the Japan Meteorological Agency. It carries the Advanced Himawari Imager (AHI) on board, which can continuously monitor high-impact weather events with high frequency in space and time. The assimilation of AHI radiance data was implemented with the three-dimensional variational data assimilation system (3DVAR) of the Weather Research and Forecasting Model for the analysis and prediction of Typhoon Soudelor (2015) in the Pacific typhoon season. The effective assimilation of AHI radiance data in improving the forecast of the tropical cyclone during its rapid intensification has been realized. The results show that, after assimilating the AHI radiance data under clear-sky conditions, the typhoon position in the background field of the model was effectively corrected compared with the control experiment without AHI radiance data assimilation. It is found that the assimilation of AHI radiance data is able to improve the analyses of the water vapor and wind in a typhoon's inner-core region. The analyses and forecasts of the minimum sea level pressure, the maximum surface wind, and the track of the typhoon are further improved.

中文翻译：

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使用WRF-3DVAR系统将Himawari-8成像仪的辐射数据同化，以预测台风苏德勒

Himawari-8是日本气象厅发射的下一代地球静止气象卫星。它搭载了先进的Himawari成像仪（AHI），可以连续不断地以高时空频率监视高影响力的天气事件。AHI辐射数据的同化是通过气象研究和预报模型的三维变分数据同化系统（3DVAR）进行的，用于分析和预测太平洋台风季节的Soudelor（2015）台风。已经实现了对AHI辐射数据的有效同化，以改善热带气旋快速增强期间的预报。结果表明，在晴空条件下吸收AHI辐射数据后，与没有AHI辐射数据同化的对照实验相比，该模型在背景场中的台风位置得到了有效校正。研究发现，对AHI辐射数据的同化可以改善对台风内核区域中水汽和风的分析。最小海平面压力，最大表面风和台风轨迹的分析和预报得到进一步改进。