Plateau Meteorology

Plateau Meteorology >

2018 , Vol. 37 >Issue 4: 1083 - 1093

DOI: https://doi.org/10.7522/j.issn.1000-0534.2017.00089

The Application of Intensive FY-2G AMVs in GRAPES_RAFS

  • WAN Xiaomin ,
  • HAN Wei ,
  • TIAN Weihong ,
  • HE Xiaohuan
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  • National Meteorological Centre, Beijing 100081, China

Received date: 2017-05-05

  Online published: 2018-08-28

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Abstract

Atmospheric Motion Vectors (AMVs) can supply plenty of useful information for numerical weather prediction.Statistical results demonstrate that the quality of intensive FY-2G Atmospheric Motion Vectors (AMVs) is best when the quality indicator (QI) is greater than 80.Therefor, it is necessary to evaluate intensive FY-2G AMVs for the analysis field and precipitation forecast in GRAPES (Global/Regional Assimilation Prediction System) at CMA.In this study, by using GRAPES_RAFS (Rapid Analysis and Forecast System), three contrast tests had been researched based on one rainstorm occurred from 2 to 3 July 2016.The results show that assimilation of intensive FY-2G AMVs have weak positive impacts on the 850 hPa wind and height analysis field.The 24 hours precipitation forecast results show positive contribution to rainfall intensity and location prediction when using intensive FY-2G AMVs.One-month experiments were conducted to examine the impact of assimilating intensive FY-2G AMVs, the results indicate that assimilating intensive FY-2G AMVs improves the wind analysis field, especially in high levels, and the precipitation forecasting scores for moderate rain to heavy rain are improved with using intensive FY-2G AMVs.

Key words： Intensive FY-2G IR A; GRAPES; data assimilation; influence experiment

Cite this article

WAN Xiaomin , HAN Wei , TIAN Weihong , HE Xiaohuan . The Application of Intensive FY-2G AMVs in GRAPES_RAFS[J]. Plateau Meteorology, 2018 , 37(4) : 1083 -1093 . DOI: 10.7522/j.issn.1000-0534.2017.00089

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