Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2019.104811 |
A multiscale analysis of the tornadoes of 30-31 May 2019 in south-central Chile | |
Barrett, Bradford S.1; Marin, Julio C.2,3; Jacques-Coper, Martin4,5 | |
2020-05-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2020 |
卷号 | 236 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Chile |
英文摘要 | On 30 and 31 May 2019, tornadoes occurred in the cities of Los Angeles and Talcahuano/Concepcion in southcentral Chile, in a region where tornado activity is not common. The main goal of this study was to analyze these tornadoes across multiple scales: synoptic, mesoscale, and subseasonal. On the synoptic scale, the tornadoes were associated with an anomalous 500-hPa trough and associated surface cyclone to the west of Chile. A strong (20 + m s(-1)) low-level jet accompanied this trough, potentially enhanced by flow blocking by the Andes. A relatively warm and saturated surface layer combined with cold upper-level temperatures in the trough to yield 200-500 J kg(-1) of CAPE on both days. This CAPE was accompanied by high levels of both deep-layer and low-level shear. Storm motions inferred by lightning swaths and GOES-IR imagery, along with estimates of storm motion and updraft helicity from a high-resolution WRF simulation, suggested this CAPE-shear combination was sufficient for the tornadic thunderstorms to be supercells. Finally, anomalies of sea level pressure, 500-hPa height, and surface dew point temperature from 27 to 31 May 2019 resembled long-term composite anomalies for MJO phases 1 and 2, suggesting a subseasonal link between the extreme event in Chile and convection in the tropics. |
英文关键词 | Tornadoes Chile Synoptic meteorology Mesoscale modeling |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000525322900003 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; SEVERE THUNDERSTORM ; SEASON TORNADOES ; SIERRA-NEVADA ; COOL-SEASON ; HIGH-SHEAR ; PRECIPITATION ; CLIMATOLOGY ; MJO ; TEMPERATURE |
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/278870 |
专题 | 地球科学 |
作者单位 | 1.US Naval Acad, Oceanog Dept, Annapolis, MD 21402 USA; 2.Univ Valparaiso, Dept Meteorol, Valparaiso, Chile; 3.Univ Valparaiso, Ctr Estudios Atmosfer & Astroestadist, Valparaiso, Chile; 4.Univ Concepcion, Dept Geophys, Concepcion, Chile; 5.Ctr Climate & Resilience Res, Santiago, Chile |
推荐引用方式 GB/T 7714 | Barrett, Bradford S.,Marin, Julio C.,Jacques-Coper, Martin. A multiscale analysis of the tornadoes of 30-31 May 2019 in south-central Chile[J]. ATMOSPHERIC RESEARCH,2020,236. |
APA | Barrett, Bradford S.,Marin, Julio C.,&Jacques-Coper, Martin.(2020).A multiscale analysis of the tornadoes of 30-31 May 2019 in south-central Chile.ATMOSPHERIC RESEARCH,236. |
MLA | Barrett, Bradford S.,et al."A multiscale analysis of the tornadoes of 30-31 May 2019 in south-central Chile".ATMOSPHERIC RESEARCH 236(2020). |
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