Análise da influência gravitacional lunar sobre os complexos convectivos de Mesoescala na região Nordeste brasileira

Abstract

This study verified if the behavior since formation to dissipation on a Mesoscale Convective Complex (MCC) is somehow related to the sea level rising caused by ocean tide. The objective of this study is to find a possible link between ocean height variation and the MCC event. The ocean tide data were obtained from the Banco Nacional de Dados Oceanográficos (BNDO) between January 2005 and December 2009. The MCC event data in this period were collected in previous researches in UFAL Sinoptics Laboratory which add up the total of 41 cases. When relating the ocean tide forecast data with the MCC, a significant relationship was observed. A significant variation in sea surface temperature related with MCC was detected. There was an evident relationship between seasonality with tide behavior and lunar phase and duration of MCC. The major occurrence of the MCC are in Autumn with 63% of the cases. There are no records of a Winter MCC. The MCC events reached its maximum growth in 63% of cases in the flood tide. The dissipation occurred in 56% of the tidal flow. A probable association between the sea temperature variation with depth of 60 meters with the occurrence of MCC event was verified. A more detailed study of the temperature variations is needed to confirm the relationship.