Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Impact of Different Meteorological Initializations on WRF Simulation During the KORUS-AQ Campaign

KORUS-AQ 기간 동안 초기 입력 자료에 따른 WRF 기상장 모의 결과 비교

  • Mun, Jeonghyeok (Division of Earth Environmental System, Pusan National University) ;
  • Jeon, Wonbae (Department of Atmospheric Sciences, Pusan National University) ;
  • Lee, Hwa Woon (Department of Atmospheric Sciences, Pusan National University)
  • 문정혁 (부산대학교 지구환경시스템학부) ;
  • 전원배 (부산대학교 대기환경과학과) ;
  • 이화운 (부산대학교 대기환경과학과)
  • Received : 2019.10.21
  • Accepted : 2020.01.13
  • Published : 2020.01.31
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Abstract

Recently, a variety of modeling studies have been conducted to examine the air quality over South Korea during the Korea - United States Air Quality (KORUS-AQ) campaign period (May 1 to June 10, 2016). This study investigates the impact of different meteorological initializations on atmospheric modeling results. We conduct several simulations during the KORUS-AQ period using the Weather Research and Forecasting (WRF) model with two different initial datasets, which is FNL of NCEP and ERA5 of ECMWF. Comparing the raw initial data, ERA5 showed better accuracy in the temperature, wind speed, and mixing ratio fields than those of NCEP-FNL. On the other hand, the results of WRF simulations with ERA5 showed better accuracy in the simulated temperature and mixing ratio than those with FNL, except for wind speed. Comparing the nudging efficiency of temperature and wind speed fields, the grid nudging effect on the FNL simulation was larger than that on the ERA5 simulation, but the results of mixing ratio field was the opposite. Overall, WRF simulation with ERA5 data showed a better performance for temperature and mixing ratio simulations than that with FNL data. For wind speed simulation, however, WRF simulation with FNL data indicated more accurate results compared to that with ERA5 data.

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References

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