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논문 기본 정보

자료유형
학술저널
저자정보
김기병 (경북대학교) 김권일 (스토니브룩대학교) 이규원 (경북대학교) 임교선 (경북대학교)
저널정보
한국기상학회 대기 대기 Vol.34 No.3
발행연도
2024.8
수록면
305 - 317 (13page)

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The study examines the effects of parameters that define the characteristics of raindrops on the simulated precipitation during the summer season over Korea using the Weather Research and Forecasting (WRF) Double-Moment 6-class (WDM6) cloud microphysics scheme. Prescribed parameters, defining the characteristics of hydrometeors in the WDM6 scheme such as a<SUB>R</SUB>, b<SUB>R</SUB>, and f<SUB>R</SUB> in the fall velocity (V<SUB>R</SUB>) - diameter (D<SUB>R</SUB>) relationship and shape parameter (μ<SUB>R</SUB>) in the number concentration (N<SUB>R</SUB>) - D<SUB>R</SUB> relationship, presents different values compared to the observed data from Two-Dimensional Video Disdrometer (2DVD) at Boseong standard meteorological observatory during 2018~2019. Three experiments were designed for the heavy rainfall event on August 8, 2022 using WRF version 4.3. These include the control (CNTL) experiment with original parameters in the WDM6 scheme; the MUR experiment, adopting the 50th percentile observation value for μ<SUB>R</SUB>; and the MEDI experiment, which uses the same  μ<SUB>R</SUB> as MUR, but also includes fitted values for aR, bR, and fR from the 50th percentile of the observed V<SUB>R</SUB> - D<SUB>R</SUB> relationship. Both sensitivity experiments show improved precipitation simulation compared to the CNTL by reducing the bias and increasing the probability of detection and equitable threat scores. In these experiments, the raindrop mixing ratio increases and its number concentration decreases in the lower atmosphere. The microphysics budget analysis shows that the increase in the rain mixing ratio is due to enhanced source processes such as graupel melting, vapor condensation, and accretion between cloud water and rain. Our study also emphasizes that applying the solely observed μ<SUB>R</SUB> produces more positive impact in the precipitation simulation.

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Abstract
1. 서론
2. 연구방법
3. 결과
4. 요약 및 결론
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