Low‐ozone events and three‐dimensional transport at midlatitudes of South America during springs of 1996 and 1997

Abstract

Abstract.Sudden and transient decreases of ozone column values were detected over the midlatitudes of South America during the springs of 1996 and 1997 by a network of ground instruments. These low-ozone events were accompanied by air temperature decreases in the lower stratosphere. The analysis of the events suggests a connection with the springtime Antarctic ozone hole. Three-dimensional isentropic back trajectories showed that vertical motion also contributed to the decreases of total ozone observed at the midlatitudes of South America. IntroductionThe ozone hole is considered to be a phenomenon well located in space and time which has appeared every spring over

Influence of the Antarctic Ozone Hole over South of Brazil in 2010 and 2011

“…Similar events of low ozone air masses intrusions from Antarctic ozone hole toward mid latitude like those analyzed here were also observed over South America (Kirchho et al, 1996;Perez et al, 2000), Southern Africa (Semane et al, 2006) and New Zealand (Brinksma et al, 1998). …”

Weather Condition Associated With Influence of the Antarctic Ozone Hole Over South of Brazil on October 21th, 2011

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Análise Atmosférica Dos Eventos De Efeito Secundário Do Buraco De Ozônio Antártico Sobre O Sul Do Brasil Em 2012. Parte 2:verificação Sinótica Da Troposfera Durante Os Eventos

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