Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD030658 |
An Overview of Low-Level Jet Winds and Corresponding Mixed Layer Depths During PECAN | |
Carroll, Brian J.1,2; Demoz, Belay B.1,2; Delgado, Ruben1,2 | |
2019-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:16页码:9141-9160 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Thirty southerly low-level jet (LLJ) events were observed during the Plains Elevated Convection at Night (PECAN) field campaign in the Great Plains region of the United States during summer 2015. Here we present Doppler lidar wind data from three PECAN instrumentation sites to explore characteristics of LLJs and the boundary layer as well as some of the heterogeneities possible within the wind field of a LLJ. Southerly LLJs were observed on 66% of nights at the southwestern site (Greensburg, KS) but only 56% and 53% of nights at the eastern and northern sites, respectively (Hesston and Ellis, KS). The northernmost site had a relative abundance of weaker jets or nonjet conditions due to fronts or convective systems that only affected part of the observation domain. Plotting mean wind fields of each LLJ type reveals that the strongest LLJs tend to develop under very similar conditions but begin to show variability in wind profile evolution after several hours. A robust mixed layer height retrieval algorithm is used to investigate the interplay between the jets and the turbulent convective boundary layer, showing that stronger LLJs are preceded by deeper afternoon mixed layers and often have a later decoupling of mixing between the upper convective mixed layer and the near-surface layer. Only the strongest LLJs generated a shallow mixing layer overnight. Comparing jet strength and direction to pristine nocturnal convection initiation shows that the strongest southerly LLJs yielded the most pristine nocturnal convection initiation events per night, and the pristine nocturnal convection initiation occurred farther north. |
英文关键词 | low-level jets nocturnal boundary layer mixed layer depth nocturnal convection Doppler lidar |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490762800015 |
WOS关键词 | ATMOSPHERIC BOUNDARY-LAYER ; SOUTHERN GREAT-PLAINS ; NOCTURNAL CONVECTION INITIATION ; DOPPLER LIDAR ; CLIMATOLOGY ; TURBULENCE ; PRECIPITATION ; OSCILLATION ; PROFILES ; SYSTEMS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/186151 |
专题 | 气候变化 |
作者单位 | 1.Univ Maryland, Dept Phys, Baltimore, MD 21201 USA; 2.Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21201 USA |
推荐引用方式 GB/T 7714 | Carroll, Brian J.,Demoz, Belay B.,Delgado, Ruben. An Overview of Low-Level Jet Winds and Corresponding Mixed Layer Depths During PECAN[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(16):9141-9160. |
APA | Carroll, Brian J.,Demoz, Belay B.,&Delgado, Ruben.(2019).An Overview of Low-Level Jet Winds and Corresponding Mixed Layer Depths During PECAN.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(16),9141-9160. |
MLA | Carroll, Brian J.,et al."An Overview of Low-Level Jet Winds and Corresponding Mixed Layer Depths During PECAN".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.16(2019):9141-9160. |
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