FY-3A SATELLITE MICROWAVE DATA ASSIMILATION EXPERIMENTS IN TROPICAL CYCLONE FORECAST |
| |
Authors: | YANG Yin-ming DU Ming-bin and ZHANG Jie |
| |
Institution: | Shanghai Meteorological Center, Shanghai 200030 China;Shanghai Center for Satellite Remote Sensing and Application, Shanghai 201100 China;School of Atmospheric Science, Nanjing University, Nanjing, 210093 China;Shanghai Center for Satellite Remote Sensing and Application, Shanghai 201100 China |
| |
Abstract: | China's new generation of polar-orbiting meteorological satellite FY-3A was successfully launched on May 26, 2008, carrying microwave sounding devices which had similar performance to ATOVS of NOAA series. In order to study the application of microwave sounding data in numerical prediction of typhoons and to improve typhoon forecasting, we assimilated data directly for numerical forecasting of the track and intensity of the 2009 typhoon Morakot (0908) based on the WRF-3DVar system. Results showed that the initial fields of the numerical model due to direct assimilation of FY-3A microwave sounding data was improved much more than that due to assimilation of conventional observations alone, and the improvement was especially significant over the ocean, which is always without conventional observations. The model initial fields were more reasonable in reflecting the initial situation of typhoon circulation as well as temperature and humidity conditions, and typhoon central position at sea was also adjusted. Through direct 3DVar assimilation of FY-3A microwave data, the regional mesoscale model improves the forecasting of typhoon track. Therefore, the FY-3A microwave data could efficiently improve the numerical prediction of typhoons. |
| |
Keywords: | satellite data assimilation FY-3A microwave sounding typhoon Morakot 3DVar |
本文献已被 CNKI 维普 等数据库收录! |
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 |
|