节点文献

EXPERIMENTAL APPLICATION OF A THINNING SCHEME FOR THE ASSIMILATION OF SURFACE OBSERVATION DATA IN GRAPES-3DVAR

免费订阅

【作者】 赵虹刘寅

【Author】 ZHAO Hong;LIU Yin;Luhe Meteorological Bureau;Jiangsu Meteorological Observation Center;Jiangsu Institute of Meteorological Sciences;

【通讯作者】 刘寅;

【机构】 Luhe Meteorological BureauJiangsu Meteorological Observation CenterJiangsu Institute of Meteorological Sciences

【摘要】 To reduce the spatial correlation of representation error in observations and computational complexity, we propose a thinning scheme that can extract typical observations within a certain range. This scheme is applied to the Global/Regional Assimilation and Prediction System(GRAPES) with three-dimensional variation(3 DVAR) to study the effect of the thinning radius on the assimilation results. The assimilation experiments indicate that when the ratio of the model resolution to the observational resolution is 1:3, the simulated results for precipitation are relatively good and have a relatively high equitable threat score(ETS). Moreover, the analysis errors in the temperature and the specific humidity are the smallest, the dependence of the norm gradient vector of the objective function on the number of iterations is slow, gentle, and close to 0, and the minimization results in improved conditions.

【基金】 Young Meteorological Research of Jiangsu Provincial Meteorological Bureau(Q201611);Key Scientific Research Projects of Jiangsu Provincial Meteorological Bureau(KZ201605);Natural Science Foundation of Jiangsu Province(BK20161074);Beijige Fund of Jiangsu Institute of Meteorological Sciences(BJG201512)
【所属期刊栏目】 ARTICLES (2018年03期)
  • 【DOI】10.16555/j.1006-8775.2018.03.007
  • 【分类号】P412
  • 【下载频次】5
节点文献中: 

本文链接的文献网络图示:

浏览历史:
下载历史: