Estudo das frentes de brisa em Salvador: uma avaliação da sua influência na gênese de extremos.

Abstract

The research's fundamental theme is the study of the relationship between breeze fronts and extreme precipitation in Salvador (BA), going through its genesis and constitution. In this context, the general objective of this dissertation is to investigate the influence of breeze fronts on the genesis of extreme precipitation events and episodes in the city of Salvador (BA). To this end, the following specific objectives were listed: a) Carry out a climatic characterization of the study area; b) Promote a discussion about what constitutes a breeze front and its differentiation from cold fronts; c) Study the relationship between breeze fronts and rainfall production on days of extreme events. The climatology of extreme events in cities such as Salvador (BA) presents itself as an important aspect for climate geography, due to the material character given to it when excessive rainfall - or not - triggers impacts in space. In view of this, its genesis, and the nuances contained within it, has been an increasingly effervescent subject as an object of study in academia, as well as in public debate, due to the entire context intertwined in the scenario of climate change and the consequent , growing media appeal around this theme. Thus, in order to meet the aforementioned criteria and objectives, the methodological processes were the collection of precipitation data from CEMADEN, from 2014 to 2020, on a daily and monthly basis. With this, the performance of percentile techniques to define the extremes. However, satellite images of the GOES visible channel were also used to identify and differentiate atmospheric systems, as well as to designate the participation of breeze fronts on days of extreme events and episodes, through this synoptic analysis systematized to meet the dynamics of the climate in its usual succession and rhythm. (Monteiro, 1971 and Sorre, 1951)). Finally, correlation techniques were also used to investigate how teleconnections impact this breeze-precipitation front dynamic.