气候变化领域集成服务门户(CCPortal): Simulating North American mesoscale convective systems with a convection-permitting climate model

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DOI	10.1007/s00382-017-3993-2
	Simulating North American mesoscale convective systems with a convection-permitting climate model
	Prein A.F.; Liu C.; Ikeda K.; Bullock R.; Rasmussen R.M.; Holland G.J.; Clark M.
发表日期	2020
ISSN	0930-7575
起始页码	95
结束页码	110
卷号	55
英文摘要	Deep convection is a key process in the climate system and the main source of precipitation in the tropics, subtropics, and mid-latitudes during summer. Furthermore, it is related to high impact weather causing floods, hail, tornadoes, landslides, and other hazards. State-of-the-art climate models have to parameterize deep convection due to their coarse grid spacing. These parameterizations are a major source of uncertainty and long-standing model biases. We present a North American scale convection-permitting climate simulation that is able to explicitly simulate deep convection due to its 4-km grid spacing. We apply a feature-tracking algorithm to detect hourly precipitation from Mesoscale Convective Systems (MCSs) in the model and compare it with radar-based precipitation estimates east of the US Continental Divide. The simulation is able to capture the main characteristics of the observed MCSs such as their size, precipitation rate, propagation speed, and lifetime within observational uncertainties. In particular, the model is able to produce realistically propagating MCSs, which was a long-standing challenge in climate modeling. However, the MCS frequency is significantly underestimated in the central US during late summer. We discuss the origin of this frequency biases and suggest strategies for model improvements. © 2017, The Author(s).
英文关键词	Convection-permitting climate modeling; Mesoscale convective systems; North America; Precipitation extremes; Strom tracking
语种	英语
scopus关键词	climate modeling; convective system; mesoscale meteorology; precipitation (climatology); summer; United States
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145428
作者单位	National Center for Atmospheric Research, 3090 Center Green Drive, Boulder, CO 80301, United States
推荐引用方式 GB/T 7714	Prein A.F.,Liu C.,Ikeda K.,et al. Simulating North American mesoscale convective systems with a convection-permitting climate model[J],2020,55.
APA	Prein A.F..,Liu C..,Ikeda K..,Bullock R..,Rasmussen R.M..,...&Clark M..(2020).Simulating North American mesoscale convective systems with a convection-permitting climate model.Climate Dynamics,55.
MLA	Prein A.F.,et al."Simulating North American mesoscale convective systems with a convection-permitting climate model".Climate Dynamics 55(2020).