Climate - Biogeochemistry Interactions in the Tropical Oceans (SFB 754)

Collaborators:Logo SFB 754

several institutes at Kiel University

The Collaborative Research Center (SFB 754) addresses the relatively newly recognized threat of ocean deoxygenation, its possible impact on tropical oxygen minimum zones and implications for the global climate-biogeochemistry system. The overall goal of the SFB 754 is to improve understanding of the coupling of tropical climate variability and circulation with the ocean's oxygen and nutrient balance, to quantitatively evaluate the nature of oxygen-sensitive tipping points, as well as to assess consequences for the Ocean's future.

For further information please visit: http://www.sfb754.de/en/?Home


The importance of submarine groundwater discharge for the southwestern Baltic Sea (SGDBALTIC)Logo SGDBALTIC

Alfred-Wegner Institute, Bremerhaven
Helmholtz Centre for Environmental Research, Leipzig

This project investigates the occurrence of submarine groundwater discharge in the southwestern Baltic Sea and the potential impact of SGD on the coastal environment (EU FP7 funded).

Transport and Fluxes across the benthic boundary layer – subproject within the special research project SFB 754 “Climate - Biogeochemistry Interactions in the Tropical Ocean” (further information: http://www.sfb754.de/en/?Home)


Groundwater/seawater along the south African coast and its effects on sustainable coastal and water resource management (SPACES).

Collaborators: Logo SPACES
Helmholtz Centre for Environmental Research, Leipzig (project coordinator)
Weihenstephan-Triesdorf University of Applied Sciences
Leibniz Institute for Baltic Sea Research, Warnemünde
Council for Scientific and Industrial Research, Western Cape, South Africa

This collaborative project investigates the groundwater/seawater interaction (GSI) along the South African south coast between False Bay and East London with the focus on the impact of groundwater discharge on coastal environments and its effects on marine biota. Furthermore the vulnerability of aquifers due to land use changes and due to groundwater overexploitation is studied (BMBF funded).

For further information please visit: http://www.spaces-gsi.com/


Biogeochemistry of trace metals and their isotopes in the southeastern Atlantic. RV Meteor cruise M121.M121

Principal investigators:
Prof. Dr. M. Frank
Prof. Dr. E. Achterberg
Prof. Dr. Andrea Koschinsky

This cruise is part of the internationally coordinated program GEOTRACES. The main goal of the cruise is to determine in detail the distributions of trace elements and their isotopes (TEIs) in the water column of the SE Atlantic in order to constrain TEI supply and removal mechanisms, their biogeochemical cycling, and their interaction with the nitrogen cycle in the study region. The focus of our group will be on the distribution radium isotopes to investigate the origin and fluxes of TEIs. (DFG funded).


New surveillance tools for remote sea monitoring and their application on submarine groundwater discharge and seabed surveys (BONUS SEAMOUNT)


Bonus SeamountBounsForschungszentrum Jülich
CAU personnel involved:

Jan Scholten

Jan F. Schröder

In this project, the technology for an innovative underwater vehicle with the capability of complex real-time sea surveys will be established. The modular design of the platform includes a radon sensor for the detection and monitoring of submarine groundwater discharge (SGD) sources, UW-video camera, multiparameter probe (CTD, pH, oxygen, nutrients and others), and subsystems for autonomous navigation and communication. The system will be tested and compared with conventional measurements at SGD sites in the Eckernfoerde Bay (Germany), the Horsens Estuary (Denmark) and offshore southern Finland. Integrated hydrological modelling and additional permanent monitoring will allow investigating the importance of SGD for nutrient and pollutant fluxes to the Baltic Sea.


Funded by the BONUS Baltic Sea research and development programme, and the Federal Ministry of Education and Research, Germany.


Abgeschlossene Projekte

Assessing the submarine groundwater discharge flux to meet potable water demand and improve domestic water supply in coastal regions (Mauritius). (IAEA funded)

Mauritius Oceanography Institute, Mauritius
Alfred-Wegener Institute, Bermerhaven


DFG Priority-Program 1144: From Mantle to Ocean: Energy-, Material- and Life-cycles at Spreading Axes”

Project: Temporal evolution of hydrothermal systems at the Mid-Atlantic Ridge (14°45 - 15°05 N).



For further information please visit: http://www.geomar.de/en/research/fb4/fb4-muhs/projects/spp1144/