Influence analysis of extratropical cyclones in increase of salinity at the estuary of Patos Lagoon, southern Brazil

• Autor(a) principal: Campos, Natalia Pereira de
• Data de Publicação: 2012
• Outros Autores: Rodrigues, Jeane Patricio, Ribeiro, Andréa de Lima, D'Incao, Fernando
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da FURG (RI FURG)
• Texto Completo: http://repositorio.furg.br/handle/1/5708
• topic: Extratropical cyclones; El niño; La niña; Estuary; Patos Lagoon; Salinity; Ciclones extratropicais; Estuario; Lagoa dos Patos; Salinidade

The extratropical cyclones are associates to frontals systems and air temperatures gradients at troposphere. The aim of this work was relate the effect of these cyclones in increase of salinity in the stream of access to Patos Lagoon. A climatologic analysis of extratropical cyclones that moved for northeast/east near to the coast of Rio Grande do Sul State, in two distinct periods: May 2006 to march 2007 and May 2007 to March 2008. The first one corresponds to an El Niño period and the second one to a La Niña period. This analysis was made through the satellite GOES-E images and for the surface synoptic maps available by CPTEC. The salinity data had been collected daily in the stream. The cyclogenesis during La Niña was bigger than El Niño, however in El Niño period they had been more representative in the climatic change in the region, mainly in increase of the south wind intensity, that pushes saline water for inside of the estuary, so had more than increase in the salinity caused by the south wind during this period. However exists, the significant relationship between the extratropical cyclones of and the increase of salinity in the estuary of Patos Lagoon