Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Impact of Meteorological Initial Input Data on WRF Simulation - Comparison of ERA-Interim and FNL Data

초기 입력 자료에 따른 WRF 기상장 모의 결과 차이 - ERA-Interim과 FNL자료의 비교

  • Mun, Jeonghyeok (Division of Earth Environmental System, Pusan National University) ;
  • Lee, Hwa Woon (Department of Atmospheric Sciences, Pusan National University) ;
  • Jeon, Wonbae (Institute of Environment Studies, Pusan National University) ;
  • Lee, Soon-Hwan (Department of Earth Science Education, Pusan National University)
  • 문정혁 (부산대학교 지구환경시스템학부) ;
  • 이화운 (부산대학교 대기환경과학과) ;
  • 전원배 (부산대학교 환경연구원) ;
  • 이순환 (부산대학교 지구과학교육과)
  • Received : 2017.09.05
  • Accepted : 2017.11.10
  • Published : 2017.12.31
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Abstract

In this study, we investigated the impact of different initial data on atmospheric modeling results using the Weather Research and Forecast (WRF) model. Four WRF simulations were conducted with different initialization in March 2015, which showed the highest monthly mean $PM_{10}$ concentration in the recent ten years (2006-2015). The results of WRF simulations using NCEP-FNL and ERA-Interim were compared with observed surface temperature and wind speed data, and the difference of grid nudging effect on WRF simulation between the two data were also analyzed. The FNL simulation showed better accuracy in the simulated temperature and wind speed than the Interim simulation, and the difference was clear in the coastal area. The grid nudging effect on the Interim simulation was larger than that of the FNL simulation. Despite of the higher spatial resolution of ERA-Interim data compared to NCEP-FNL data, the Interim simulation showed slightly worse accuracy than those of the FNL simulation. It was due to uncertainties associated with the Sea Surface Temperature (SST) field in the ERA-Interim data. The results from the Interim simulation with different SST data showed significantly improved accuracy than the standard Interim simulation. It means that the SST field in the ERA-Interim data need to be optimized for the better WRF simulation. In conclusion, although the WRF simulation with ERA-Interim data does not show reasonable accuracy compared to those with NCEP-FNL data, it would be able to be Improved by optimizing the SST variable.

Keywords

References

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