Radar Signatures and Surface Observations of Elevated Convection Associated with Damaging Surface Winds

Brett S. Borchardt, Keith D. Sherburn, Russ S. Schumacher
{"title":"Radar Signatures and Surface Observations of Elevated Convection Associated with Damaging Surface Winds","authors":"Brett S. Borchardt, Keith D. Sherburn, Russ S. Schumacher","doi":"10.1175/waf-d-23-0171.1","DOIUrl":null,"url":null,"abstract":"\nIdentifying radar signatures indicative of damaging surface winds produced by convection remains a challenge for operational meteorologists, especially within environments characterized by strong low-level static stability and convection for which inflow is presumably entirely above the planetary boundary layer. Numerical model simulations suggest the most prevalent method through which elevated convection generates damaging surface winds is via “up-down” trajectories, where a near-surface stable layer is dynamically lifted and then dropped with little to no connection to momentum associated with the elevated convection itself. Recently, a number of unique convective episodes during which damaging surface winds were produced by apparently elevated convection coincident with mesoscale gravity waves were identified and cataloged for study. A novel radar signature indicative of damaging surface winds produced by elevated convection is introduced through six representative cases. One case is then explored further via a high-resolution model simulation and related to the conceptual model of “up-down” trajectories. Understanding the processes responsible for, and radar signature indicative of, damaging surface winds produced by gravity-wave coincident convection will help operational forecasters identify and ultimately warn for a previously underappreciated phenomenon that poses a threat to lives and property.","PeriodicalId":509742,"journal":{"name":"Weather and Forecasting","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Weather and Forecasting","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1175/waf-d-23-0171.1","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Identifying radar signatures indicative of damaging surface winds produced by convection remains a challenge for operational meteorologists, especially within environments characterized by strong low-level static stability and convection for which inflow is presumably entirely above the planetary boundary layer. Numerical model simulations suggest the most prevalent method through which elevated convection generates damaging surface winds is via “up-down” trajectories, where a near-surface stable layer is dynamically lifted and then dropped with little to no connection to momentum associated with the elevated convection itself. Recently, a number of unique convective episodes during which damaging surface winds were produced by apparently elevated convection coincident with mesoscale gravity waves were identified and cataloged for study. A novel radar signature indicative of damaging surface winds produced by elevated convection is introduced through six representative cases. One case is then explored further via a high-resolution model simulation and related to the conceptual model of “up-down” trajectories. Understanding the processes responsible for, and radar signature indicative of, damaging surface winds produced by gravity-wave coincident convection will help operational forecasters identify and ultimately warn for a previously underappreciated phenomenon that poses a threat to lives and property.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
与破坏性地表风有关的高空对流的雷达特征和地表观测结果
识别对流产生的破坏性地表风的雷达特征对业务气象学家来说仍然是一个挑战,特别是在以强低层静态稳定和对流为特征的环境中,其流入可能完全在行星边界层之上。数值模式模拟表明,高空对流产生破坏性地面风的最普遍方法是通过 "上-下 "轨迹,即近地面稳定层被动态抬升,然后下降,与高空对流本身相关的动量几乎没有联系。最近,人们发现了一些独特的对流事件,在这些事件中,明显的高对流与中尺度重力波同时产生了破坏性表面风,并对这些事件进行了编目研究。本文通过六个具有代表性的案例,介绍了由高对流产生的破坏性地表风的新型雷达特征。然后通过高分辨率模型模拟进一步探讨了其中一个案例,并将其与 "上-下 "轨迹概念模型联系起来。了解重力波重合对流产生破坏性表面风的过程和雷达特征,将有助于业务预报员识别并最终发出警报,这种现象以前未得到充分重视,对生命和财产构成威胁。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Improvement of Wind Power Prediction by Assimilating Principal Components of Cabin Radar Observations Tropical cyclones in the GEOS-S2S-2 subseasonal forecasts Regime-Dependent Characteristics and Predictability of Cold Season Precipitation Events in the St. Lawrence River Valley The evolution of the 2021 Seacor Power Tragedy in Coastal Louisiana Representation of Blowing Snow and Associated Visibility Reduction in an Operational High-Resolution Weather Model
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1