| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | mtc-m16b.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Repository | cptec.inpe.br/adm_conf/2005/10.24.16.24 | |||
| Last Update | 2006:04.16.19.20.24 (UTC) administrator | |||
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.24.16.24.14 | |||
| Metadata Last Update | 2018:06.05.03.42.43 (UTC) administrator | |||
| Citation Key | PscheidtGrim:2006:InElNi | |||
| Title | The influence of El Niño and La Niña episodes in the occurrence of extreme precipitation events over Southern Brazil  | |||
| Format | CD-ROM, On-line. | |||
| Year | 2006 | |||
| Access Date | 2024, Apr. 23 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 582 KiB | |||
| 2. Context | ||||
| Author | 1 Pscheidt, Ieda 2 Grimm, Alice Marlene | |||
| Affiliation | 1 Universidade de São Paulo, Instituto Astronômico, Geofísico e Ciências Atmosféricas, Departamento de Ciências Atmosféricas 2 Rua do Matão, 1226 - Cidade Universitária -05508-900- São Paulo - SP, Brasil (Pscheidt) 3 Universidade Federal do Paraná, Departamento de Física, Centro Politécnico - Campus III - Jardim das Américas - 81531-990 - Curitiba- PR, Brasil (Grimm) | |||
| Author e-Mail Address | 1 pscheidt@model.iag.usp.br 2 grimm@fisica.ufpr.br | |||
| Editor | Vera, Carolina Nobre, Carlos | |||
| e-Mail Address | pscheidt@model.iag.usp.br | |||
| Conference Name | International Conference on Southern Hemisphere Meteorology and Oceanography, 8 (ICSHMO). | |||
| Conference Location | Foz do Iguaçu | |||
| Date | 24-28 Apr. 2006 | |||
| Publisher | American Meteorological Society (AMS) | |||
| Publisher City | 45 Beacon Hill Road, Boston, MA, USA | |||
| Pages | 365-370 | |||
| Book Title | Proceedings | |||
| Tertiary Type | Poster | |||
| Organization | American Meteorological Society (AMS) | |||
| History (UTC) | 2005-10-24 16:24:14 :: pscheidt@model.iag.usp.br -> adm_conf :: 2005-12-16 02:47:42 :: adm_conf -> pscheidt@model.iag.usp.br :: 2006-03-30 00:29:41 :: pscheidt@model.iag.usp.br -> administrator :: 2006-04-18 20:56:26 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:22 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:55:41 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:43 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:51:32 :: administrator -> banon :: 2006 2011-01-02 17:14:43 :: banon -> administrator :: 2006 2018-06-05 03:42:43 :: administrator -> :: 2006 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Keywords | El-Niño extreme events precipitation regional analysis variability | |||
| Abstract | El Niño (EN) and La Niña (LN) episodes cause impacts in the precipitation over Southern Brazil. The impact on the frequency of extreme precipitation events is here regionally analysed. November is a period with increase of severe rain events in EN and reduction in LN. During July of the following year also occurs increase/reduction of extreme events in some areas. The precipitation and the number of extreme events in homogeneous areas with respect to significant increase or reduction of severe rain events show significant correlation with Sea Surface Temperature (SST) in some regions of the globe, mainly those affected by El Niño-Southern Oscilation (ENSO) episodes. Notwithstanding, lower-frequency variability is also associated with the variation of these extremes. The variation of the number of severe rain events between different EN and LN episodes seems to be associated with the variation of SST in certain regions. The most recurrent patterns of atmospheric circulation favoring the occurrence of extreme events are present in extreme events during both El Niño and La Niña episodes, as well as during neutral years. However, composites of monthly anomalies in EN and LN years, show that the large-scale favorable conditions for the occurrence of extreme events appear more during EN than during LN episodes. This explains the large difference between the frequency of those events during EN and LN episodes. Composites of anomalies show differences between EN years with more severe rain events and EN years with less of these events with respect to neutral years, mainly in the fields of global SST, vorticity advection at 500 hPa, geopotencial height at 850 hPa, streamfunction at sigma level 0.21 and divergence of vertically integrated moisture flux. These fields show patterns favorable to precipitation during the years with increase in the number of extreme events and unfavorable in years with reduction of these events. During November of EN years with more severe events than normal there is advection of ciclonic vorticity over Southern Brazil and positive SST anomaly in the equatorial East Pacific much more intense than that observed in years with less extreme events. When there is a reduction of extreme precipitation events in July of the year following the onset of an EN episode there are positive anomalies of geopotencial height at low levels and negative at high levels, indicating anomalous subsidence. Furthermore, there are significant negative SST anomalies in the equatorial East Pacific, while in years with more severe events this does not occurr. | |||
| Area | MET | |||
| Type | Climate change in the SH | |||
| doc Directory Content | access | |||
| source Directory Content |
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| agreement Directory Content | there are no files | |||
| 4. Conditions of access and use | ||||
| data URL | http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.24.16.24 | |||
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.24.16.24 | |||
| Language | en | |||
| Target File | 365-370.pdf | |||
| User Group | pscheidt@model.iag.usp.br administrator | |||
| Visibility | shown | |||
| 5. Allied materials | ||||
| Host Collection | cptec.inpe.br/nobre/2005/06.02.21.14 cptec.inpe.br/walmeida/2003/04.25.17.12 | |||
| 6. Notes | ||||
| Mark | 1 | |||
| Empty Fields | archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage doi edition group identifier isbn issn label lineage mirrorrepository nextedition nexthigherunit notes numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark serieseditor session shorttitle sponsor subject tertiarymark url versiontype volume | |||