التفاصيل البيبلوغرافية
| العنوان: |
Study of three days duration coupling between jets in South América ; Estudo de acoplamento entre jatos com duração de três dias na América do Sul |
| المؤلفون: |
Ramos, Emily Claudia Pereira, Machado, Luiz Gabriel Cassol, Nunes, André Becker |
| المصدر: |
Ibero-American Journal of Environmental Sciences; Vol. 12 No. 2 (2021): Revista Ibero-Americana de Ciências Ambientais - Fev 2021; 240-248 ; Revista Iberoamericana de Ciencias Ambientales; Vol. 12 Núm. 2 (2021): Revista Ibero-Americana de Ciências Ambientais - Fev 2021; 240-248 ; Revista Ibero-Americana de Ciências Ambientais; v. 12 n. 2 (2021): Revista Ibero-Americana de Ciências Ambientais - Fev 2021; 240-248 ; 2179-6858 |
| بيانات النشر: |
Sustenere Publishing |
| سنة النشر: |
2021 |
| المجموعة: |
Portal de Periódicos da Sustenere Publishing Co. |
| مصطلحات موضوعية: |
Severe Weather, Low Level Jet, Jet Stream, Tempo Severo, Jato de Baixos Níveis, Corrente de jato |
| الوصف: |
It can be understood by coupling between jets when Upper-Level Jet (ULJ) superimposes the Low-Level Jet (L LJ). The literature shows that such couplings tend to generate or intensify surface instabilities. Thus, the objective of this study was to analyze the synoptic configuration and the coupling between the jets associated with storms during the period of October 28-30, 2019, when instabilities hit southern Brazil causing intense precipitation and several damages. This work was carried out through the analysis of meteorological fields employing ERA5 reanalysis data and GOES-16 satellite imagery. The coupling between jets was verified in the three days of study. Upward vertical movements at 500 hPa was observed in the same area of occurrence of the upper level difluent flow, as well as an intense 850 hPa northerly flow, a large amount of moisture due to the action of the Northwestern Argentinean Low, and the presence of a frontal system between Uruguay and RS, except on the first day. Storms developed east (downstream) of the area where the coupling took place. The coupling was observed before and during the development of the mesoscale convective systems, and its dissipation occurred simultaneously with the storm. However, on the 30th, the peak of coupling did not occur together with the most intense phase of the system, it occurred before. ; Entende-se por acoplamento entre jatos quando o Jato de Altos Níveis (JAN) se sobrepõe ao Jato de Baixos Níveis (JBN). A literatura mostra que tais acoplamentos tendem a gerar ou intensificar instabilidades em superfície. Desta forma, o objetivo desse estudo foi analisar a configuração sinótica e o acoplamento entre os jatos associados a tempestades durante o período de 28 a 30 de outubro de 2019, quando ocorreram instabilidades que atingiram o sul do Brasil, causando precipitação intensa e diversos estragos. O trabalho realizou-se por meio da análise de campos meteorológicos usando dados de reanálise do modelo ERA5 e imagens do satélite GOES-16. Foi verificado ... |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| Relation: |
http://www.sustenere.inf.br/index.php/rica/article/view/CBPC2179-6858.2021.002.0023/2570; http://www.sustenere.inf.br/index.php/rica/article/view/CBPC2179-6858.2021.002.0023 |
| الاتاحة: |
http://www.sustenere.inf.br/index.php/rica/article/view/CBPC2179-6858.2021.002.0023 |
| Rights: |
Copyright (c) 2021 Revista Ibero-Americana de Ciências Ambientais |
| رقم الانضمام: |
edsbas.9AE52292 |
| قاعدة البيانات: |
BASE |