Influência do EKE na variabilidade espaço e temporal da concentração da Clorofila-A no canal de Moçambique

Abstract

Ocean circulation in the Mozambique channel presents a circulation pattern dominated by seasonality, with greater emphasis on anticyclonic vortices. There is no conclusive evidence on the literature on the origin of cyclonic vortices in this region. The frequency of occurrence of vortices mesoscale is quite regular demonstrating that these are intensified at the surface, spreading to the South. Given the scarcity of observations in the Mozambique channel region, for better understanding of ocean circulation, until now there are doubts about the nature of ocean circulation patterns in the Mozambique Channel, and its circulation pattern is not yet well defined, the seasonal variation of the mean field of CHL-a and EKE was determined, and also evaluate the spatio-temporal variability of chlorophyll through EOF. EKE showed a circulation pattern with seasonal variations, where in winter the EKE presents low speeds on the order of 0.02𝑚𝑠−1s and in the summer the EKE presented itself with high speeds in order of 0.06𝑚𝑠.−1, CHL-a in the North and South regions is driven by mechanisms with seasonality and in the Center without. For the average ocean circulation in winter, the Mozambique does not seem to be present, as it has low speeds 0. 02𝑚𝑠−1 and on the other In mid-summer, the Mozambique current is visibly represented with speeds of up to 0.1𝑚. 𝑠 −1. In general, CHL-a is elevated by 0.5𝑚𝑔 in winter. 𝑚−3 and low in summer 0.3𝑚𝑔. 𝑚−3, in the present study it is concluded that the Central region along the Mozambique channel presents higher concentrations of chlorophyll-a in the order of 0.5𝑚𝑔. 𝑚−3 , and the lowest averages in North and South regions with concentrations below 0.3𝑚𝑔. 𝑚−3