Impact of assimilation of ASCAT winds in NCMRWF GDAF system

  • Anjari Gupta National Center for Medium Range Weather Forecasting (NCMRWF) Ministry of Earth Sciences (MoES) Noida (U.P)
  • S. Indira Rani National Center for Medium Range Weather Forecasting (NCMRWF) Ministry of Earth Sciences (MoES) Noida (U.P)
  • V.S. Prasad National Center for Medium Range Weather Forecasting (NCMRWF) Ministry of Earth Sciences (MoES) Noida (U.P)

Abstract

The impact of Advanced Scatterometer (ASCAT) winds in National Centre for Medium Range Weather Forecasting (NCMRWF) Global Data Assimilation and Forecasting System (GDAFS) has been estimated in this study. The assimilation technique used is the Grid Statistical Interpolation (GSI) scheme, a version of three dimensional variational methods in the NCMRWF T574L64 model. Model has been run without (EXP) and with (CNTL) ASCAT winds along with other conventional and satellite observations routinely assimilating in NCMRWF T574L64 model. The model has been run for a period of 18 days spanning from 6 to 23 June 2011, during this period two depressions were formed over the Indian Ocean. Positive impact in the analysis and forecast fields were observed, especially in the fields like vorticity, relative humidity and low level wind due to the assimilation of ASCAT winds
Published
2013-01-01
How to Cite
Gupta, A., Rani, S., & Prasad, V. (2013). Impact of assimilation of ASCAT winds in NCMRWF GDAF system. Vayumandal, 39(1-2), 3-11. Retrieved from https://vayumandal.imetsociety.org/index.php/Vayumandal/article/view/177
Issue
Vol 39 No 1-2 (2013): VAYUMANDAL
Section
Research Paper

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