| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/3UHGAHH | |||
| Repository | sid.inpe.br/mtc-m21c/2019/12.10.12.25 | |||
| Last Update | 2021:01.14.16.53.29 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2019/12.10.12.25.46 | |||
| Metadata Last Update | 2021:01.14.16.53.30 (UTC) simone | |||
| Secondary Key | INPE--PRE/ | |||
| Citation Key | MachadoChabRibeFrei:2019:EvNeCo | |||
| Title | The São Borja Downburst Observed During RELAMPAGO: Evidences and a New Conceptual Model  | |||
| Year | 2019 | |||
| Access Date | 2024, May 19 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 4342 KiB | |||
| 2. Context | ||||
| Author | 1 Machado, Luiz Augusto Toledo 2 Chaboureau, Jean-Pierre 3 Ribeiro, Bruno Zanetti 4 Freitas, Edmilson Dias de | |||
| Resume Identifier | 1 8JMKD3MGP5W/3C9JHMS | |||
| Group | 1 DIDSA-CGCPT-INPE-MCTIC-GOV-BR 2 3 DIDSA-CGCPT-INPE-MCTIC-GOV-BR | |||
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 University Paul Sabatier Toulouse III 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Universidade de São Paulo (USP) | |||
| Author e-Mail Address | 1 luiz.machado@inpe.br 2 3 bruno.ribeiro@inpe.br | |||
| Conference Name | AGU Fall Meeting | |||
| Conference Location | San Francisco, CA | |||
| Date | 09-13 dec. | |||
| History (UTC) | 2019-12-10 12:25:46 :: simone -> administrator :: 2021-01-03 02:12:35 :: administrator -> simone :: 2019 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Abstract | During the RELAMPAGO campaign, a downburst was observed at São Borja, a Brazilian city close to Argentina. A mesoscale convective system, formed over the south of Paraguay during the night of the 27 November 2018, split in two supercells. Its anticyclonic circulation moved toward the southeast reaching São Borja, the downburst occurred at around 1400 UTC. The measured Vertically Integrated Liquid (VIL) changed from 235 kg/m2 to 105 kg/m2 in 10 minutes. This 130 kg/m2 of water corresponds to around 1.5 million tons of water falling in 10 minutes over 2000 km radius area. Data from the X band Dual Pol radar describes the processes leading to the downburst, which are associated with the formation of a mesocyclone and its collapse in few minutes. Based on these measurements, a new conceptual model is presented. The mesocyclone is located at 6000 m height, just above the maximum vertical velocity, the Bounded Weak Echo Region (BWER), and captured hydrometeors in its circulation. This explains the highest reflectivity observed there. In this circulation, hail can grow because constantly fed by the strong updrafts which bring air mixed with supercooled liquid water and ice as shown by the lower polar cross correlation inside the BWER. This conceptual model can also explain how large hydrometeors can grow, because staying for longer time confined to the mesocyclone circulation. Hydrometeors are caught in the rotation and sustained by the meso-region of upward field. The region where the downdraft begins inhibits the upward motion. Ice evaporates and downdraft increases. The downdraft in this part of the mesocyclone creates convergence of ice that stimulates aggregation, increasing hail size, and thus precipitating. Consequently, precipitation reaches the lower level and overcomes the surface convergence reducing the updraft. The BWER is the updraft pillar of the mesocyclone: if it collapses or moves away from the mesocyclone, the mesocyclone collapses reaching the surface. This hypothesis was tested using the MESO-NH model. The presentation will describe the observations and some preliminary results from the simulations. The RELAMPAGO campaign in São Borja was supported by FAPESP grant 2015/14497-0. | |||
| Area | MET | |||
| Arrangement | urlib.net > DIDSA > The São Borja... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| data URL | http://mtc-m21c.sid.inpe.br/ibi/8JMKD3MGP3W34R/3UHGAHH | |||
| zipped data URL | http://mtc-m21c.sid.inpe.br/zip/8JMKD3MGP3W34R/3UHGAHH | |||
| Language | en | |||
| Target File | machado-sao.pdf | |||
| User Group | simone | |||
| Reader Group | administrator simone | |||
| Visibility | shown | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Mirror Repository | urlib.net/www/2017/11.22.19.04.03 | |||
| Next Higher Units | 8JMKD3MGPCW/43SRC6S | |||
| Citing Item List | sid.inpe.br/bibdigital/2021/01.03.02.10 2 | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label lineage mark nextedition notes numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url versiontype volume | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||