Mechanisms of near-surface current and upwelling variability in the tropical Atlantic
The upwelling regions of the eastern equatorial oceans provide not only sources of cold water in a relatively warm environment but also influence the atmospheric circulation and the biological productivity in the tropics. However, the sources of the upwelling waters are well known only for the equatorial upwelling but remained unclear for the off-equatorial upwelling in the Guinea and Angola Dome. A main aspect of this work is to contribute to the understanding of the mean pathways into these Dome regions. A second part of this work focused on interannual to decadal variability of the equatorial near-surface currents related to fluctuations of the subtropical-tropical cell (STC) and the conveyer belt (MOC) return flow.