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Abstract:

A relevant feature of the South American low-level circulation during the wet season is a poleward warm and moist current immediately to the east of the Andes often referred to as a low-level jet, because of its resemblance to the Great Plains low-level jet. Provided that the lack of observational data causes a great deal of uncertainty on the ability of analyses to describe diurnal fluctuations of sub-synoptic features like a low-level jet, this description has been carried out using the Eta regional model. Special emphasis has been given to the detection and characterization of a low-level jet (LLJ) east of the Andes, as a feature best developed at night and mesoscale cross-stream dimensions. This study describes the modeled northerly current east of the Andes during the 1997-1998 warm season, and progress on its mean characterization, including diurnal fluctuations and horizontal and vertical structure. From moisture budget calculations a net convergence of moisture flux is found over an area that includes the Del Plata basin, with a maximum southward flux through the northern boundary at low levels. While there are evidences to suggest that this model provides a realistic description of the local circulation, it is emphasized that observational data are needed to gain further understanding of the behavior of the South American low-level jet and its role upon the regional climate. © Springer-Verlag 2000.

Registro:

Documento: Artículo
Título:Model characterization of the South American low-level flow during the 1997-1998 spring-summer season
Autor:Saulo, A.C.; Nicolini, M.; Chou, S.C.
Filiación:Department of Atmospheric Sciences, University of Buenos Aires (UBA), Centro de Investigaciones del Mar y la Atmósfera (CIMA) - UBA/CONICET, Buenos Aires, Argentina
Centro de Previsao de Tempo e Estudos Climaticos - CPTEC, Instituto Nacional de Pesquisas Espaciais - INPE, Cachoeira Paulista - SP, Brazil
Palabras clave:atmospheric circulation; jet flow; model analysis; atmospheric circulation; jet flow; low flow; model validation; troposphere; South America
Año:2000
Volumen:16
Número:10-11
Página de inicio:867
Página de fin:881
DOI: http://dx.doi.org/10.1007/s003820000085
Título revista:Climate Dynamics
Título revista abreviado:Clim. Dyn.
ISSN:09307575
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v16_n10-11_p867_Saulo

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Citas:

---------- APA ----------
Saulo, A.C., Nicolini, M. & Chou, S.C. (2000) . Model characterization of the South American low-level flow during the 1997-1998 spring-summer season. Climate Dynamics, 16(10-11), 867-881.
http://dx.doi.org/10.1007/s003820000085
---------- CHICAGO ----------
Saulo, A.C., Nicolini, M., Chou, S.C. "Model characterization of the South American low-level flow during the 1997-1998 spring-summer season" . Climate Dynamics 16, no. 10-11 (2000) : 867-881.
http://dx.doi.org/10.1007/s003820000085
---------- MLA ----------
Saulo, A.C., Nicolini, M., Chou, S.C. "Model characterization of the South American low-level flow during the 1997-1998 spring-summer season" . Climate Dynamics, vol. 16, no. 10-11, 2000, pp. 867-881.
http://dx.doi.org/10.1007/s003820000085
---------- VANCOUVER ----------
Saulo, A.C., Nicolini, M., Chou, S.C. Model characterization of the South American low-level flow during the 1997-1998 spring-summer season. Clim. Dyn. 2000;16(10-11):867-881.
http://dx.doi.org/10.1007/s003820000085