气候变化领域集成服务门户(CCPortal): Updraft and Downdraft Core Size and Intensity as Revealed by Radar Wind Profilers: MCS Observations and Idealized Model Comparisons

CCPortal

DOI	10.1029/2019JD031774
	Updraft and Downdraft Core Size and Intensity as Revealed by Radar Wind Profilers: MCS Observations and Idealized Model Comparisons
	Wang D.; Giangrande S.E.; Feng Z.; Hardin J.C.; Prein A.F.
发表日期	2020
ISSN	2169897X
卷号	125 期号:11
英文摘要	This study explores the updraft and downdraft properties of mature stage mesoscale convective systems (MCSs) in terms of draft core width, shape, intensity, and mass flux characteristics. The observations use extended radar wind profiler (RWP) and surveillance radar data sets from the U.S. Department of Energy Atmospheric Radiation Measurement program for midlatitude (Oklahoma, USA) and tropical (Amazon, Brazil) sites. MCS drafts behave qualitatively similar to previous aircraft and RWP cloud summaries. The Oklahoma MCSs indicate larger and more intense convective updraft and downdraft cores, and greater mass flux than Amazon MCS counterparts. However, similar size-intensity relationships and draft vertical profile behaviors are observed for both regions. Additional similarities include weak positive correlations between core intensity and core width (correlation coefficient r ∼ 0.5) and increases in draft intensity with altitude. A model-observational intercomparison for draft properties (core width, intensity, and mass flux) is also performed to illustrate the potential usefulness of statistical observed draft characterizations. Idealized simulations with the Weather Research and Forecasting model aligned with midlatitude MCS conditions are performed at model grid spacings (△x) that range from 4 km to 250 m. It is shown that the simulations performed at △x = 250 m at similar mature MCS lifecycle stages are those that exhibit draft intensity, width, mass flux, and shape parameter performances best matching with observed properties. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	convective draft; mass flux; mesoscale convective system; radar wind profiler; vertical velocity; Weather Research and Forecasting model
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/185994
作者单位	Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, United States; Pacific Northwest National Laboratory, Richland, WA, United States; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Wang D.,Giangrande S.E.,Feng Z.,et al. Updraft and Downdraft Core Size and Intensity as Revealed by Radar Wind Profilers: MCS Observations and Idealized Model Comparisons[J],2020,125(11).
APA	Wang D.,Giangrande S.E.,Feng Z.,Hardin J.C.,&Prein A.F..(2020).Updraft and Downdraft Core Size and Intensity as Revealed by Radar Wind Profilers: MCS Observations and Idealized Model Comparisons.Journal of Geophysical Research: Atmospheres,125(11).
MLA	Wang D.,et al."Updraft and Downdraft Core Size and Intensity as Revealed by Radar Wind Profilers: MCS Observations and Idealized Model Comparisons".Journal of Geophysical Research: Atmospheres 125.11(2020).