ASSIMILATION OF OBSERVED SURFACE WIND WITH GRAPES

作者：Ding Yang^*; Zhuang Shi yu; Gu Jian feng

来源：Journal of Tropical Meteorology, 2010, 16(1): 96-100.

DOI：10.3969/j.issn.1006-8775.2010.01.015

• numerical weather simulation
• forecast
• surface wind
• data assimilation
• restriction of thermodynamic processes
• GRAPES

With the advances of numerical weather simulation and reduced data assimilation updating cycle, surface observation data assimilation becomes more and more important in data assimilation systems. It is widely accepted that a better data assimilation system should contain the restriction of thermodynamic processes in the surface layer. Therefore, in this paper, a new surface wind observation operator is utilized in Global and Regional Assimilation PrEdiction System_3D-Variance (GRAPES_3D-Var), with the restriction of thermodynamic process in the planetary boundary layer (PBL). In order to research the ability of this new surface wind observation operator in assimilation and forecasting, a series of experiments are operated by using the GRAPES model. The main results indicate that this new method of surface wind observation operator has positive impact on the forecast with the GRAPES model.

• 出版日期2010
• 单位中国气象科学研究院