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Sensitivity Analysis of Numerical Weather Prediction Model with Topographic Effect in the Radiative Transfer Process
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복사전달과정에서 지형효과에 따른 기상수치모델의 민감도 분석

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Type
Academic journal
Author
Joon-Bum Jee (한국외국어대학교) Jae-Sik Min (한국외국어대학교) Min Jang (한국외국어대학교) Bu-Yo Kim (강릉원주대학교) Il-Sung Zo (강릉원주대학교) Kyu-Tae Lee (강릉원주대학교)
Journal
Korean Meteorological Society Atmosphere-Korea Vol.27 No.4 KCI Accredited Journals ESCI
Published
2017.12
Pages
385 - 398 (14page)

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Sensitivity Analysis of Numerical Weather Prediction Model with Topographic Effect in the Radiative Transfer Process
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Numerical weather prediction experiments were carried out by applying topographic effects to reduce or enhance the solar radiation by terrain. In this study, χ and κ(φ<SUB>o</SUB>, θ<SUB>o</SUB>) are precalculated for topographic effect on high resolution numerical weather prediction (NWP) with 1 km spatial resolution, and meteorological variables are analyzed through the numerical experiments. For the numerical simulations, cases were selected in winter (CASE 1) and summer (CASE 2). In the CASE 2, topographic effect was observed on the southward surface to enhance the solar energy reaching the surface, and enhance surface temperature and temperature at 2 m. Especially, the surface temperature is changed sensitively due to the change of the solar energy on the surface, but the change of the precipitation is difficult to match of topographic effect. As a result of the verification using Korea Meteorological Administration (KMA) Automated Weather System (AWS) data on Seoul metropolitan area, the topographic effect is very weak in the winter case. In the CASE 1, the improvement of accuracy was numerically confirmed by decreasing the bias and RMSE (Root mean square error) of temperature at 2 m, wind speed at 10 m and relative humidity. However, the accuracy of rainfall prediction (Threat score (TS), BIAS, equitable threat score (ETS)) with topographic effect is decreased compared to without topographic effect. It is analyzed that the topographic effect improves the solar radiation on surface and affect the enhancements of surface temperature, 2 meter temperature, wind speed, and PBL height.
#High resolution #topographic effect #numerical weather prediction model #solar radiation #Seoul metropolitan area

Contents

Abstract
1. 서론
2. 자료 및 방법
3. 결과
4. 요약 및 결론
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References (39)

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Baik, J.-J., Y.-H. Kim, and H.-Y. Chun, 2001: Dry and moist convection forced by an urban heat island. J. Appl. Meteor., 40, 1462-1475. Ca, V. T., T. Asaeda, and Y. Ashie, 1999: Development of a numerical model for the evaluation of the urban thermal environment. J. Wind Eng. Ind. Aerod., 81, 181- 196. Choi, Y.-J., S.-L. Kang, J. Hong, S. Grimmond, and K. J. Davis, 2013: A next-generation weather information service engine (WISE) customized for urban and surrounding rural areas. Bull. Amer. Meteor. Soc., 94, ES114-ES117, doi:10.1175/BAMS-D-12-00217.1. Chou, M.-D., and M. J. Suarez, 1999: A Solar Radiation Parameterization for Atmospheric Studies. NASA/ TM-1999-104606, Vol. 15, 39 pp. Donlon, C. J., M. Martin, J. Stark, J. Roberts-Jones, E. Fiedler, and W. Wimmer, 2011: The Operational Sea Surface Temperature and Sea Ice analysis (OSTIA). Remote Sens. Environ., 116, 140-158, doi:10.1016/ j.rse.2010.10.017.

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