Impact of Assimilating FY-3D MWTS-2 Upper Air Sounding Data on Forecasting Typhoon Lekima (2019)
Impact of Assimilating FY-3D MWTS-2 Upper Air Sounding Data on Forecasting Typhoon Lekima (2019)
复制标题
同化FY-3D MWTS-2高空探测数据对预报台风利奇马（2019）的影响
DOI：
10.3390/rs13091841
复制
发表时间：
2021
期刊：
影响因子：
5
通讯作者：
Wei Huang
中科院分区：
文献类型：
--
作者：
Zeyi Niu;Lei Zhang;Peiming Dong;Fuzhong Weng;Wei Huang
利用网格点统计内插（Gridpoint Statistical Interpolation，GSI）同化系统，将风云-3D（FY-3D）晴空微波温度探测仪-2（MWTS-2）辐射场直接同化到区域中尺度天气研究与预报模式（WRF）中。利用AMSU-A辐射计（EXP_AD）和FY-3D MWTS-2高空5-7通道探空资料（EXP_AMD）对台风利奇马（Lekima）的路径误差进行了同化对比试验。FY-3D MWTS-2通道5、6和7的晴空平均偏差校正观测值减背景（O-B）值分别为0.27、0.10和0.57 K，比未进行偏差校正的观测值小。与WRF模式在没有卫星资料的情况下进行的预报试验相比，同化卫星辐射能使预报性能得到改善，EXP_AD和EXP_AMD在36 h后的平均航迹误差分别减小了8.7%（~18.4 km）和30%（~58.6 km）。模拟的转向流方向在EXP_AD中由西南方向变为东南方向，这对提前3天预报台风利奇马（2019）的登陆具有关键意义。MWTS-2对流层上层5-7通道同化对台风利奇马路径预报有很大的改进潜力。
In this study, the Fengyun-3D (FY-3D) clear-sky microwave temperature sounder-2 (MWTS-2) radiances were directly assimilated in the regional mesoscale Weather Research and Forecasting (WRF) model using the Gridpoint Statistical Interpolation (GSI) data assimilation system. The assimilation experiments were conducted to compare the track errors of typhoon Lekima from uses of the Advanced Microwave Sounding Unit-A (AMSU-A) radiances (EXP_AD) with those from FY-3D MWTS-2 upper-air sounding data at channels 5–7 (EXP_AMD). The clear-sky mean bias-corrected observation-minus-background (O-B) values of FY-3D MWTS-2 channels 5, 6, and 7 are 0.27, 0.10 and 0.57 K, respectively, which are smaller than those without bias corrections. Compared with the control experiment, which was the forecast of the WRF model without use of satellite data, the assimilation of satellite radiances can improve the forecast performance and reduce the mean track error by 8.7% (~18.4 km) and 30% (~58.6 km) beyond 36 h through the EXP_AD and EXP_AMD, respectively. The direction of simulated steering flow changed from southwest in the EXP_AD to southeast in the EXP_AMD, which can be pivotal to forecasting the landfall of typhoon Lekima (2019) three days in advance. Assimilation of MWTS-2 upper-troposphere channels 5–7 has great potential to improve the track forecasts for typhoon Lekima.
登录
查看更多内容
影响因子：
3.2
作者：
Whitaker, Jeffrey S.;Hamill, Thomas M.;Toth, Zoltan
通讯作者：
Toth, Zoltan
影响因子：
--
作者：
N. Grody;Jiang Zhao;R. Ferraro;F. Weng;R. Boers
通讯作者：
N. Grody;Jiang Zhao;R. Ferraro;F. Weng;R. Boers
影响因子：
3.2
作者：
R. Torn;Travis J. Elless;P. Papin;C. Davis
通讯作者：
R. Torn;Travis J. Elless;P. Papin;C. Davis
影响因子：
5.8
作者：
F. Carminati;N. Atkinson;B. Candy;Q. Lu
通讯作者：
F. Carminati;N. Atkinson;B. Candy;Q. Lu
影响因子：
8.9
作者：
J. Eyre;P. Watts
通讯作者：
J. Eyre;P. Watts