Model characterization of the South American low-level flow during the 1997-1998 spring-summer season
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 d...
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2000
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v16_n10-11_p867_Saulo http://hdl.handle.net/20.500.12110/paper_09307575_v16_n10-11_p867_Saulo |
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paper:paper_09307575_v16_n10-11_p867_Saulo2023-06-08T15:52:34Z Model characterization of the South American low-level flow during the 1997-1998 spring-summer season atmospheric circulation jet flow model analysis atmospheric circulation jet flow low flow model validation troposphere South America 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. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v16_n10-11_p867_Saulo http://hdl.handle.net/20.500.12110/paper_09307575_v16_n10-11_p867_Saulo |
| 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 jet flow model analysis atmospheric circulation jet flow low flow model validation troposphere South America |
| spellingShingle |
atmospheric circulation jet flow model analysis atmospheric circulation jet flow low flow model validation troposphere South America Model characterization of the South American low-level flow during the 1997-1998 spring-summer season |
| topic_facet |
atmospheric circulation jet flow model analysis atmospheric circulation jet flow low flow model validation troposphere South America |
| description |
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. |
| title |
Model characterization of the South American low-level flow during the 1997-1998 spring-summer season |
| title_short |
Model characterization of the South American low-level flow during the 1997-1998 spring-summer season |
| title_full |
Model characterization of the South American low-level flow during the 1997-1998 spring-summer season |
| title_fullStr |
Model characterization of the South American low-level flow during the 1997-1998 spring-summer season |
| title_full_unstemmed |
Model characterization of the South American low-level flow during the 1997-1998 spring-summer season |
| title_sort |
model characterization of the south american low-level flow during the 1997-1998 spring-summer season |
| publishDate |
2000 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v16_n10-11_p867_Saulo http://hdl.handle.net/20.500.12110/paper_09307575_v16_n10-11_p867_Saulo |
| _version_ |
1768544603051393024 |