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SACUS II: Project: WTZ Southern Africa - SPACES: SACUS II - Southwest African Coastal Upwelling System and Benguela Ninos; Subproject: Variability of of poleward transport in the Southatlantic eastern boundary currents

The project considers the dynamics and variability of the water mass spreading from the equatorial ocean into the Benguela upwelling system. The Focus is on the interplay of remotely forced waves from the equatorial area and locally wind driven transports. New field, remote sensing and model data permit a reconsideration of the "Intense Benguela Upwelling"-index as a measure for upwelling strength. The proposed study will enhance the knowledge about processes, which control the climate variability in the Benguela upwelling system. Additionally, the project contributes to the installation of an observational system and to the development of a regional model system as tools for coping with socio-economic consequences of climate change. The project results will foster the sustainable use of resources of the complex Benguela marine ecosystem. The gathered data will be published and delivered to regional data bases. The model system will be free accessible. The project develops also the cooperation between German and African partners and contributes to students training and capacity building in the region.


  • Siegfried, L., M. Schmidt, V. Mohrholz, H. Pogrzeba, P. Nardini, M. Böttinger and G. Scheuermann (2019). The tropical-subtropical coupling in the Southeast Atlantic from the perspective of the northern Benguela upwelling system. PLoS One 14: e0210083, doi: 10.1371/journal.pone.0210083
  • Nardini, P., M. Böttinger, H. Pogrzeba, L. Siegfried, M. Schmidt and G. Scheuermann (2018). Numerical evaluation of pathline predicates of the Benguela Upwelling System. In: LEVIA'18. Leipzig: Universität Leipzig,
  • Junker, T., V. Mohrholz, M. Schmidt, L. Siegfried and A. van der Plas (2019). Coastal trapped wave propagation along the southwest African shelf as revealed by moored observations. J. Phys. Oceanogr. 49: 851-866, doi: 10.1175/jpo-d-18-0046.1
  • Junker, T., V. Mohrholz, L. Siegfried and A. van der Plas (2017). Seasonal to interannual variability of water mass characteristics and currents on the Namibian shelf. J. Mar. Syst. 165: 36-46, doi: 10.1016/j.jmarsys.2016.09.003