Análise da influência do ciclone idai sobre a circulação das correntes, temperatura superficial do mar, salinidade superficial e distribuição da clorofila no canal de Moçambique

Abstract

The coast of Mozambique and its channel are considered to be the most vulnerable to along the African coast due to its geographical location that favors the occurrence of cyclones and storms of tropical origin as they border one of the most active cyclone basins tropical Southwestern Intic Ocean. Recently (March 2019) the country was battered by the Idai cyclone considered category 4 having converged in the city of Beira and affecting more than 967,000 people and causing the death of 598 people in Sofala and Manica provinces. in addition to the social effects, there is a lack of information regarding the effects that this cyclone caused on the circulation of currents and change in chlorophyll distribution, sea surface temperature and salinity superficial. To obtain these results, GHRSST, SMAP, Satellite images were used MODIS-Aqua and ERA5 reanalysis data on APDR, PODAAC, NASA and later platforms processing in the IDV, SNAP and Matlab software, based on the comparison of results for the month of March 2018 and 2019. The surface temperature of the sea after the cyclone are relatively low compared to the year without cyclone (2018) in the central region of Mozambican coast with a temperature drop of 3°C and as for the concentration of chlorophyll there was an increase from 0.08 mg.m-3 to 0.16 mg.m-3. However, there was a reduction in the sea ​​surface temperature and salinity and an increase in chlorophyll distribution. already the currents were influenced by the wind effect.