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| DOI | 10.1016/j.atmosres.2019.104811 |
| A multiscale analysis of the tornadoes of 30–31 May 2019 in south-central Chile | |
| Barrett B.S.; Marin J.C.; Jacques-Coper M. | |
| 发表日期 | 2020 |
| ISSN | 0169-8095 |
| 卷号 | 236 |
| 英文摘要 | On 30 and 31 May 2019, tornadoes occurred in the cities of Los Angeles and Talcahuano/Concepción in south-central 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. © 2019 |
| 英文关键词 | Chile; Mesoscale modeling; Synoptic meteorology; Tornadoes |
| 学科领域 | Sea level; Storms; Chile; Dewpoint temperature; Meso-scale modeling; Multi scale analysis; Sea level pressure; Synoptic meteorology; Tornadic thunderstorms; Upper level temperatures; Tornadoes; air temperature; atmospheric convection; cyclone; jet stream; mesoscale meteorology; sea level pressure; synoptic meteorology; thunderstorm; tornado; updraft; Andes; Bio Bio; Chile; Concepcion [Bio Bio]; Los Angeles [Bio Bio]; Talcahuano |
| 语种 | 英语 |
| scopus关键词 | Sea level; Storms; Chile; Dewpoint temperature; Meso-scale modeling; Multi scale analysis; Sea level pressure; Synoptic meteorology; Tornadic thunderstorms; Upper level temperatures; Tornadoes; air temperature; atmospheric convection; cyclone; jet stream; mesoscale meteorology; sea level pressure; synoptic meteorology; thunderstorm; tornado; updraft; Andes; Bio Bio; Chile; Concepcion [Bio Bio]; Los Angeles [Bio Bio]; Talcahuano |
| 来源期刊 | Atmospheric Research
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/120474 |
| 作者单位 | Oceanography Department, U.S. Naval Academy, United States; Department of Meteorology, Universidad de Valparaíso, Chile; Centro de Estudios Atmosféricos y Astroestadística, Universidad de Valparaíso, Chile; Department of Geophysics, Universidad de Concepción, Chile; Center for Climate and Resilience Research (CR)2, Chile |
| 推荐引用方式 GB/T 7714 | Barrett B.S.,Marin J.C.,Jacques-Coper M.. A multiscale analysis of the tornadoes of 30–31 May 2019 in south-central Chile[J],2020,236. |
| APA | Barrett B.S.,Marin J.C.,&Jacques-Coper M..(2020).A multiscale analysis of the tornadoes of 30–31 May 2019 in south-central Chile.Atmospheric Research,236. |
| MLA | Barrett B.S.,et al."A multiscale analysis of the tornadoes of 30–31 May 2019 in south-central Chile".Atmospheric Research 236(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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