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1. Identificação
Tipo de ReferênciaArtigo em Evento (Conference Proceedings)
Sitemtc-m21b.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34P/3K3B4US
Repositóriosid.inpe.br/mtc-m21b/2015/08.11.12.58
Última Atualização2015:09.28.12.41.37 (UTC) administrator
Repositório de Metadadossid.inpe.br/mtc-m21b/2015/08.11.12.58.50
Última Atualização dos Metadados2018:06.04.02.55.37 (UTC) administrator
Chave SecundáriaINPE--PRE/
Chave de CitaçãoRibeiroSelu:2015:AnSe'c
TítuloAnalysis of a severe 'comma-shaped' bow echo in southern Brazil
Ano2015
Data de Acesso17 maio 2024
Tipo SecundárioPRE CI
Número de Arquivos1
Tamanho1199 KiB
2. Contextualização
Autor1 Ribeiro, Bruno Zanetti
2 Seluchi, Marcelo Enrique
Identificador de Curriculo1
2 8JMKD3MGP5W/3C9JHP2
Grupo1 MET-MET-SPG-INPE-MCTI-GOV-BR
2 CPT-CPT-INPE-MCTI-GOV-BR
Afiliação1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autor1 bruno.ribeiro@cptec.inpe.br
2 marcelo.seluchi@cemaden.gov.br
Nome do EventoConference on Mesoscale Processes, 16
Localização do EventoBoston, MA
Data3-6 Aug.
Histórico (UTC)2015-08-11 12:58:50 :: simone -> administrator ::
2018-06-04 02:55:37 :: administrator -> simone :: 2015
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
ResumoOn 19 October 2014, a squall line with an embedded 'comma-shaped' bow echo (inverted comma in Southern Hemisphere) impacted Southern Brazil, causing material damage due to severe straight-line winds. The damaging-wind path and duration suggest this event was a derecho. Storm morphology was analyzed using a S-band radar in the city of Santiago, Southern Brazil. Synoptic and thermodynamic environments were analyzed through surface stations and sounding data, as well as the CFSR reanalysis fields preceding the event. Several intense storms formed along an outflow boundary over Northern Argentina, where a tornado was reported, and then moved east toward Brazil organized as a squall line. Most severe wind gusts were associated with embedded bow echoes, and the most intense measured gust, of 60 kt, occurred near the head of the comma-shaped bow echo. Moreover, the damage registered in some locations lead to estimates of 80-100 kt wind gusts. The squall line formed under weak forcing, in the left entrance of an upper-level jet streak and ahead of a surface cold front. A sounding launched just before the squall line passage showed intense low-level vertical wind shear (17 m/s 0-1-km and 15 m/s 0-3-km line-perpendicular shear), favoring bowing segments within the squall line. Below approximately 2.5 km above ground level the shear was mostly directional, becoming predominantly a speed shear above this height. Most unstable CAPE was 2100 J/kg, indicating moderate thermodynamic instability, but precipitable water was more than 50 mm, which favors heavy precipitation and strong cold pools. 250-hPa winds of more than 85 kt were observed, coherent with a leading-line propagation at approximately 50 kt. The comma-shaped bow echo formed in response to strengthening of the cyclonic bookend vortex associated with the bow echo. The high-precipitation supercell responsible for the tornado in Argentina possibly provided cyclonic vorticity to the bookend vortex. The supercell formed before the squall-line organization and may have played an important role in creating the cold pool responsible for driving the system. Evolution of the comma-shaped system follows theoretical models for the Northern Hemisphere. The bowing segment moved faster than other sectors of the squall line, which might have been caused by acceleration of the Rear-Inflow Jet. After bookend vortex formation, the northern flank of the squall line caused wind gusts of more than 50 kt in other locations, while the southern flank weakened, causing wind gusts of less than 25 kt. This study describes a classic case of a strong comma-shaped bow echo embedded in a squall line, and it is the first of this kind realized in Southern Brazil. Future work on numerical simulations of bow echoes is required to elucidate the behavior of these systems in this region.
ÁreaMET
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4. Condições de acesso e uso
URL dos dadoshttp://mtc-m21b.sid.inpe.br/ibi/8JMKD3MGP3W34P/3K3B4US
URL dos dados zipadoshttp://mtc-m21b.sid.inpe.br/zip/8JMKD3MGP3W34P/3K3B4US
Grupo de Usuáriossimone
Grupo de Leitoresadministrator
simone
Visibilidadeshown
Permissão de Leituraallow from all
Permissão de Atualizaçãonão transferida
5. Fontes relacionadas
Vinculação8JMKD3MGP8W/3FL69TE
Repositório Espelhosid.inpe.br/mtc-m21b/2013/09.26.14.25.22
Unidades Imediatamente Superiores8JMKD3MGPCW/3EUPEJL
8JMKD3MGPCW/3F35TRS
Lista de Itens Citandosid.inpe.br/bibdigital/2013/10.06.18.03 6
sid.inpe.br/mtc-m21/2012/07.13.14.54.36 1
sid.inpe.br/bibdigital/2013/10.15.01.34 1
Acervo Hospedeirosid.inpe.br/mtc-m21b/2013/09.26.14.25.20
6. Notas
Campos Vaziosarchivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label language lineage mark nextedition notes numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject targetfile tertiarytype type url versiontype volume
7. Controle da descrição
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