气候变化领域集成服务门户(CCPortal): Impact of Different Nesting Methods on the Simulation of a Severe Convective Event Over South Korea Using the Weather Research and Forecasting Model

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DOI	10.1029/2020JD033084
	Impact of Different Nesting Methods on the Simulation of a Severe Convective Event Over South Korea Using the Weather Research and Forecasting Model
	Madhulatha A.; Choi S.-J.; Han J.-Y.; Hong S.-Y.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	In this study, the effects of different nesting methods on simulating a flash-flood-producing severe convective event over Cheongju, South Korea on July 16, 2017 was examined. This event developed as part of a mesoscale convective system (MCS) accompanied by frontal forcing. Numerical experiments were conducted using the Weather Research and Forecasting model (WRF) employing one-way concurrent (OWC), one-way sequential (OWS), and two-way (TW) nesting approaches with advanced physics options from Korean Integrated Model (KIM). Analysis of model simulations against Tropical Rainfall Measuring Mission (TRMM) and Automatic Weather Station (AWS) observations suggests that the TW nesting method performs better than both OW nesting methods in simulating rainfall. Large-scale features, moisture, instability in the boundary layer, and the vertical distribution of meteorological parameters favorable for convection are better represented by TW nesting. Probability distribution Function (PDF) analysis from AWS/WRF reveals that the local-scale distribution of surface meteorological parameters which affect storm intensity were well captured using TW. Further assessment of Equitable Threat score (ETS) also showed better precipitation forecast skill over different thresholds in TW. Vertical velocity in the innermost domain simulated using TW nesting is more consistent with ERA5 reanalysis. An additional MCS (11–13 July 2006) simulated using a similar numerical setup also benefited from TW nesting, increasing confidence in the initial findings. Along with frequent lateral boundary conditions, TW nesting allows multi-scale interactions between parent and nested domains and improves the representation of both synoptic and local-scale features, enhanced cloud hydrometeor, vertical velocity distributions, and subsequent rainfall. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Changma season; feedback mechanism; mesoscale convective system; multi-scale interactions; nesting methods; WRF Model and KIM physics \| Two way and One-way
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185423
作者单位	Korea Institute of Atmospheric Prediction Systems, Seoul, South Korea
推荐引用方式 GB/T 7714	Madhulatha A.,Choi S.-J.,Han J.-Y.,et al. Impact of Different Nesting Methods on the Simulation of a Severe Convective Event Over South Korea Using the Weather Research and Forecasting Model[J],2021,126(5).
APA	Madhulatha A.,Choi S.-J.,Han J.-Y.,&Hong S.-Y..(2021).Impact of Different Nesting Methods on the Simulation of a Severe Convective Event Over South Korea Using the Weather Research and Forecasting Model.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Madhulatha A.,et al."Impact of Different Nesting Methods on the Simulation of a Severe Convective Event Over South Korea Using the Weather Research and Forecasting Model".Journal of Geophysical Research: Atmospheres 126.5(2021).