Tipo:	Artigo de Evento
Título:	A simple detection method for the south atlantic convergence zone (SACZ)
Autor(es):	Maroneze, Rafael Bonfim, Osmar Toledo Costa, Felipe D. Acevedo, Otávio C. Mortarini, Luca
Resumo:	The South Atlantic Convergence Zone (SACZ) is a meteorological phenomenon directly connected to the South American Monsoon System (SAMS). It is characterized as a continuous cloud band oriented in the NW-SE direction, extending from the Amazon region to the South-Central Atlantic, and persisting for at least four days. Acting as a significant source of precipitation during late Spring and Summer in South America, the SACZ plays a pivotal role in ensuring a consistent water supply for agriculture, reservoirs filling and drought mitigation in the region. The proposed index is a simplified version of methods existing in the literature and relies on the utilization of thresholding Outgoing Longwave Radiation (OLR) and clustering techniques for SACZ identification. The simplicity of this new index makes it suitable for analysis that require lengthy time series and extensive datasets. The OLR data used was obtained from NOAA's Daily Outgoing Longwave Radiation Climatic Data Record. The validation is based on confirmed SACZ episodes documented on the monthly 'Climatological Bulletin' from the Centro de Previsão do Tempo e Clima (CPTEC), covering the period from 1996 to 2014. The results show that the index overestimates the number of events, as it can also capture frontal systems, leading to the identification of different zones of convergence. Furthermore, this study involves an analysis of key attributes, such as the monthly frequency and geographical positioning of the SACZ. This research was supported by the Research & Development project sponsored by the companies ENGIE Brasil Energia and Companhia Energética Estreito, regulated by the Brazilian National Agency for Electric Energy.
Palavras-chave:	South Atlantic Convergence Zone Index Longwave radiation
CNPq:	CNPQ::ENGENHARIAS
Idioma:	eng
País:	Estados unidos
Editor:	Instituição Externa
Sigla da Instituição:	IE
Citação:	MARONEZE, Rafael; BOMFIM, Osmar Toledo; COSTA, Felipe D.; ACEVEDO, Otávio C.; MORTARINI, Luca. A simple detection method for the south atlantic convergence zone (SACZ). In: THE 104th AMS ANUAL MEETING, 104., 2024, Baltimore, Maryland. Proceedings. Baltimore: American Metereological Society, 2024. Disponível em: https://ams.confex.com/ams/104ANNUAL/meetingapp.cgi/Paper/439423.
Tipo de Acesso:	Acesso Aberto
URI:	https://repositorio.unipampa.edu.br/jspui/handle/riu/9585
Data do documento:	7-Mar-2024
Aparece nas coleções:	Engenharias-Anais de Conferências , Resumos e Artigos

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