The Effects of Assimilating Conventional and ATOVS Data on Forecasted Near-Surface Wind with WRF-3DVAR
The Effects of Assimilating Conventional and ATOVS Data on Forecasted Near-Surface Wind with WRF-3DVAR
复制标题
DOI：
10.1175/mwr-d-14-00038.1
复制
发表时间：
2015-01
影响因子：
3.2
通讯作者：
Feimin Zhang;Yi Yang;Chenghai Wang
中科院分区：
文献类型：
--
作者：
Feimin Zhang;Yi Yang;Chenghai Wang
本文利用天气研究与预报模式（WRF）的三维变分同化系统（WRF-3DVAR），研究了同时同化常规资料和先进电视红外观测卫星（TIROS）业务垂直探测仪（ATOVS）辐射率资料与只同化常规资料对近地面层风场预报的影响。结果表明，两种同化方案都改善了初始场的质量，提高了低层大气风场的预报性能。同化结果反映了风速的空间分布，观测资料同化对近地面风场预报有积极作用。尽管同化ATOVS辐射对近地面风预报的影响有限，但WRF-3DVAR系统所说明的局地天气系统的精细结构表明，同化ATOVS辐射对近地面风预报有积极影响.
AbstractIn this paper, the Weather Research and Forecasting (WRF) Model with the three-dimensional variational data assimilation (WRF-3DVAR) system is used to investigate the impact on the near-surface wind forecast of assimilating both conventional data and Advanced Television Infrared Observation Satellite (TIROS) Operational Vertical Sounder (ATOVS) radiances compared with assimilating conventional data only. The results show that the quality of the initial field and the forecast performance of wind in the lower atmosphere are improved in both assimilation cases. Assimilation results capture the spatial distribution of the wind speed, and the observation data assimilation has a positive effect on near-surface wind forecasts. Although the impacts of assimilating ATOVS radiances on near-surface wind forecasts are limited, the fine structure of local weather systems illustrated by the WRF-3DVAR system suggests that assimilating ATOVS radiances has a positive effect on the near-surface wind forecast under ...