Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Estimation of Dust Emission Schemes and Input Parameters in Wintertime Asian Dust Simulation: A Case Study of Winter Dust Event on December 29, 2007

겨울철 황사 모의시 황사배출량 산정식과 입력자료의 평가: 2007년 12월 29일 황사사례 연구

  • Kang, Jung-Yoon (School of Earth and Environmental Sciences, Seoul National University) ;
  • Kim, Sang-Woo (School of Earth and Environmental Sciences, Seoul National University) ;
  • Yoon, Soon-Chang (School of Earth and Environmental Sciences, Seoul National University)
  • 강정윤 (서울대학교 지구환경과학부) ;
  • 김상우 (서울대학교 지구환경과학부) ;
  • 윤순창 (서울대학교 지구환경과학부)
  • Received : 2011.05.30
  • Accepted : 2012.01.11
  • Published : 2012.02.29
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Abstract

A case study was conducted for a severe wintertime dust event that occurred on December 29, 2007 in Korea. Three different dust emission schemes, namely, those of Marticorena and Bergametti (1995), Lu and Shao (1999), and Shao (2004) (hereinafter, referred to MB, LS, and S04 schemes, respectively) were implemented in Weather Research Forecast with Chemistry (WRF/Chem) to assess their performance in simulating wintertime Asian dust events. WRF/Chem simulation reproduces dust emission over Mongolia on December 27 and 28, 2007 and the onset timing of the dust event in Korea well. There is, however, a huge difference among the estimated dust emission amounts for the three schemes; the dust concentration derived by MB scheme is 6 times larger than that from LS scheme. The three schemes overestimate dust concentrations when comparing to observed surface-level $PM_{10}$ mass concentrations in Ganghwa, Seoul, and Yeongwol. This discrepancy is thought to be mainly due to the overestimated model winds and the surface condition such as snow cover fraction, which did not adequately represent the real conditions. Considering frozen soil effect on dust emission, the model results are comparable with observation data: it is important to consider frozen soil in simulating wintertime dust events.

Keywords

References

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