1. Identificação | |
Tipo de Referência | Artigo em Evento (Conference Proceedings) |
Site | mtc-m16b.sid.inpe.br |
Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
Repositório | cptec.inpe.br/adm_conf/2005/10.29.18.18 |
Última Atualização | 2006:04.20.12.10.08 (UTC) administrator |
Repositório de Metadados | cptec.inpe.br/adm_conf/2005/10.29.18.18.54 |
Última Atualização dos Metadados | 2018:06.05.03.42.50 (UTC) administrator |
Chave de Citação | VargasRutlOrtl:2006:OnMoEN |
Título | Onset of modern ENSO teleconnections and climate mechanisms for Holocene debris flows along the hyperarid coast of Northern Chile-Southern Peru |
Formato | CD-ROM, On-line. |
Ano | 2006 |
Data de Acesso | 16 maio 2024 |
Tipo Secundário | PRE CI |
Número de Arquivos | 1 |
Tamanho | 1020 KiB |
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2. Contextualização | |
Autor | 1 Vargas, Gabriel 2 Rutllant, José 3 Ortlieb, Luc |
Afiliação | 1 Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Departamento de Geología, Plaza Ercilla 803, Santiago, Chile (Vargas). 2 Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Departamento de Geofísica, Blanco Encalada 2002, Santiago, Chile (Rutllant). 3 Institut de Recherche pour le Développement (IRD), PALEOTROPIQUE, 32 Avenue Henri Varagnat, F-93143, Bondy Cedex, France. |
Endereço de e-Mail do Autor | 1 gvargas@ing.uchile.cl 2 jrutllan@dgf.uchile.cl 3 Luc.Ortlieb@bondy.ird.fr |
Editor | Vera, Carolina Nobre, Carlos |
Endereço de e-Mail | jrutllan@dgf.uchile.cl |
Nome do Evento | International Conference on Southern Hemisphere Meteorology and Oceanography, 8 (ICSHMO). |
Localização do Evento | Foz do Iguaçu |
Data | 24-28 Apr. 2006 |
Editora (Publisher) | American Meteorological Society (AMS) |
Cidade da Editora | 45 Beacon Hill Road, Boston, MA, USA |
Páginas | 1629-1634 |
Título do Livro | Proceedings |
Tipo Terciário | Poster |
Organização | American Meteorological Society (AMS) |
Histórico (UTC) | 2005-10-29 18:18:54 :: jrutllan@dgf.uchile.cl -> adm_conf :: 2005-12-16 01:19:14 :: adm_conf -> jrutllan@dgf.uchile.cl :: 2006-03-29 14:15:47 :: jrutllan@dgf.uchile.cl -> administrator :: 2006-04-18 21:03:22 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:30 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:56:44 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:53 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:52:33 :: administrator -> banon :: 2006 2011-01-02 17:14:52 :: banon -> administrator :: 2006 2018-06-05 03:42:50 :: administrator -> :: 2006 |
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3. Conteúdo e estrutura | |
É a matriz ou uma cópia? | é a matriz |
Estágio do Conteúdo | concluido |
Transferível | 1 |
Palavras-Chave | Coastal Atacama desert El Niño-Southern oscillation Holocene debris flows |
Resumo | In its modern sense, El Niño-Southern Oscillation (ENSO) encompasses tropical-extratropical climate teleconnections that result into positive rainfall anomalies in subtropical western South America. The hyper-arid coastal region of southern Peru and northern Chile, located at the core of the Atacama Desert, exhibits a transitional climate between this subtropical regime and the near-equatorial region where direct ENSO effects are experienced. Meteorological mechanisms associated to the occurrence of heavy rainfall episodes along the coastal areas of southern Peru and northern Chile have been assessed to investigate their relationship with modern tropical-extratropical climate teleconnections. In this context the onset and evolution of Holocene El Niño manifestations are inferred from the analysis of new and previous geologic information in this hyper-arid coastal desert. Our results indicate that heavy rainfall and debris flow events in the southern Peru coastal region occur mostly, but not exclusively, associated to the build-up of potential instability due to positive sea-surface temperature anomalies, and its episodic release by lifting the marine boundary layer in connection with deep mid-latitude troughs and associated jet-streaks from equatorially-deflected Pacific South America (PSA) teleconnection patterns during the mature (austral summer) and the development phase (austral winter-spring) of El Niño events, respectively. Along the coast of northern Chile, those events occur almost exclusively in austral winter-spring. The comparison of debris flow and flood deposits from both areas support the onset of modern El Niño manifestations at 5,300-5,500 Cal. BP, as well as increased frequency of major events during the last thousand of years and particularly during the 20th century, consistently with other proxies of ENSO variability from the western slope of the Andes and from the equatorial Pacific Ocean. Different manifestations during the late Pleistocene and early to mid Holocene in both regions suggest that this climate teleconnection pattern did not operate at that time. We suggest that an increased frequency of debris flows between 12,900 and 8,400 Cal. BP exclusively in southern Peru, previously interpreted as an indication of strong El Niño events at that time, is most probably associated to short but intense heavy rainfall episodes, similar to those that develop at present times during the late winter-spring season in non-El Niño conditions, in which low-level wind convergence at the bend of the South American west coast (18°S) provides an extra lifting mechanism that amplifies side effects of mid-latitude disturbances. These condition would be enhanced in austral spring during the cold phase of the ENSO cycle (la Niña) and longer-period ENSO-like oscillations, when strong southerly winds and an enhanced subtropical anticyclone prevail over that area.. |
Área | MET |
Tipo | Understanding long-term climate variations in the SH |
Conteúdo da Pasta doc | acessar |
Conteúdo da Pasta source | VargasetalExtAbs8ICSHMO.doc | 29/03/2006 11:15 | 459.0 KiB | |
Conteúdo da Pasta agreement | não têm arquivos |
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4. Condições de acesso e uso | |
URL dos dados | http://mtc-m16b.sid.inpe.br/ibi/cptec.inpe.br/adm_conf/2005/10.29.18.18 |
URL dos dados zipados | http://mtc-m16b.sid.inpe.br/zip/cptec.inpe.br/adm_conf/2005/10.29.18.18 |
Idioma | en |
Arquivo Alvo | 1629-1634.pdf |
Grupo de Usuários | jrutllan@dgf.uchile.cl administrator |
Visibilidade | shown |
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5. Fontes relacionadas | |
Acervo Hospedeiro | cptec.inpe.br/nobre/2005/06.02.21.14 cptec.inpe.br/walmeida/2003/04.25.17.12 |
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6. Notas | |
Nota | 1 |
Campos Vazios | 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 |
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