Present-day South American climate

This paper documents the main features of the climate and climate variability over South America, on the basis of instrumental observations gathered during the 20th Century. It should provide a modern reference framework for paleoclimate research in South America, targeting high-resolution proxies o...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Compagnucci, Rosa Hilda
Publicado: 2009
Materias:
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v281_n3-4_p180_Garreaud
http://hdl.handle.net/20.500.12110/paper_00310182_v281_n3-4_p180_Garreaud
Aporte de:
id paper:paper_00310182_v281_n3-4_p180_Garreaud
record_format dspace
spelling paper:paper_00310182_v281_n3-4_p180_Garreaud2023-06-08T14:56:37Z Present-day South American climate Compagnucci, Rosa Hilda Atmospheric circulation Climate Climate variability Precipitation South America analytical framework annual cycle boundary layer climate variation data set latitudinal gradient meridional circulation paleoclimate precipitation (climatology) regression analysis spatial distribution temperature effect twentieth century Andes Cordillera Central [Andes] South America This paper documents the main features of the climate and climate variability over South America, on the basis of instrumental observations gathered during the 20th Century. It should provide a modern reference framework for paleoclimate research in South America, targeting high-resolution proxies over the past few centuries. Several datasets suitable for present-day climate research are first described, highlighting their advantages as well as their limitations. We then provide a basic physical understanding of the mean annual cycle of the precipitation and atmospheric circulation over the continent and the adjacent oceans. In particular, the diversity of precipitation, temperature and wind patterns is interpreted in terms of the long meridional extent of the continent and the disruption of the large-scale circulation caused by the Andes cordillera, the contrasting oceanic boundary conditions and the landmass distribution. Similarly, the intensity and timing of the interannual and interdecadal climatic fluctuations exhibit considerable geographical dependence, as some regions are more influenced by large-scale phenomena rooted in the tropical oceans while others are more influenced by high-latitude phenomena. The impact of these large-scale phenomena over South America is documented by a regression analysis between selected atmospheric indices and the precipitation and temperature fields. We have included a discussion on the seasonality and long-term stability of such impacts, and complemented our general description by an updated review of the literature on climate variability over specific regions. © 2008 Elsevier B.V. All rights reserved. Fil:Compagnucci, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v281_n3-4_p180_Garreaud http://hdl.handle.net/20.500.12110/paper_00310182_v281_n3-4_p180_Garreaud
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atmospheric circulation
Climate
Climate variability
Precipitation
South America
analytical framework
annual cycle
boundary layer
climate variation
data set
latitudinal gradient
meridional circulation
paleoclimate
precipitation (climatology)
regression analysis
spatial distribution
temperature effect
twentieth century
Andes
Cordillera Central [Andes]
South America
spellingShingle Atmospheric circulation
Climate
Climate variability
Precipitation
South America
analytical framework
annual cycle
boundary layer
climate variation
data set
latitudinal gradient
meridional circulation
paleoclimate
precipitation (climatology)
regression analysis
spatial distribution
temperature effect
twentieth century
Andes
Cordillera Central [Andes]
South America
Compagnucci, Rosa Hilda
Present-day South American climate
topic_facet Atmospheric circulation
Climate
Climate variability
Precipitation
South America
analytical framework
annual cycle
boundary layer
climate variation
data set
latitudinal gradient
meridional circulation
paleoclimate
precipitation (climatology)
regression analysis
spatial distribution
temperature effect
twentieth century
Andes
Cordillera Central [Andes]
South America
description This paper documents the main features of the climate and climate variability over South America, on the basis of instrumental observations gathered during the 20th Century. It should provide a modern reference framework for paleoclimate research in South America, targeting high-resolution proxies over the past few centuries. Several datasets suitable for present-day climate research are first described, highlighting their advantages as well as their limitations. We then provide a basic physical understanding of the mean annual cycle of the precipitation and atmospheric circulation over the continent and the adjacent oceans. In particular, the diversity of precipitation, temperature and wind patterns is interpreted in terms of the long meridional extent of the continent and the disruption of the large-scale circulation caused by the Andes cordillera, the contrasting oceanic boundary conditions and the landmass distribution. Similarly, the intensity and timing of the interannual and interdecadal climatic fluctuations exhibit considerable geographical dependence, as some regions are more influenced by large-scale phenomena rooted in the tropical oceans while others are more influenced by high-latitude phenomena. The impact of these large-scale phenomena over South America is documented by a regression analysis between selected atmospheric indices and the precipitation and temperature fields. We have included a discussion on the seasonality and long-term stability of such impacts, and complemented our general description by an updated review of the literature on climate variability over specific regions. © 2008 Elsevier B.V. All rights reserved.
author Compagnucci, Rosa Hilda
author_facet Compagnucci, Rosa Hilda
author_sort Compagnucci, Rosa Hilda
title Present-day South American climate
title_short Present-day South American climate
title_full Present-day South American climate
title_fullStr Present-day South American climate
title_full_unstemmed Present-day South American climate
title_sort present-day south american climate
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v281_n3-4_p180_Garreaud
http://hdl.handle.net/20.500.12110/paper_00310182_v281_n3-4_p180_Garreaud
work_keys_str_mv AT compagnuccirosahilda presentdaysouthamericanclimate
_version_ 1768546105151193088