INTERDECADAL AND SEASONAL ANALYSIS OF EXTRATROPICAL CYCLONES OVER SOUTHERN BRAZILIAN COAST FROM 1957-2010
DOI:
https://doi.org/10.5902/2179460X16222Keywords:
Ciclone extratropical, tempo de vida, análise, sazonal, interdecadal, Brasil.Abstract
http://dx.doi.org/10.5902/2179460X16222
This work presents the occurrence and the lifetime of extratropical cyclones over the coast of Brazil, presenting a seasonal and interdecadal analysis. The data of extratropical cyclones events were obtained through a detection scheme for trajectory data from NCEP reanalysis-1. In the current work, was made a selection of cyclones with persistence equal or major than 24 hours, for the period 1957-2010, in an area correspondent to 15ºS to 45ºS latitude and 20ºW to 60ºW of longitude. The interdecadal and seasonal proposed comparative is based in recent research of interdecadal variability. During this 54 years period, winter was the season with most occurrence of cyclones, there was 822 events. However, analyzing the time series in distinct periods is possible identify the interdecadal and seasonal variability.
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