Ocean and Climate

Our climate is determined by the complex interactions between the atmosphere, the hydrosphere, the biosphere and the geosphere, and it is ultimately the basis of all life on our planet. The ocean is one of the components, especially on long time scales. In addition to natural fluctuations controlled by interactions of the various components and the astronomical boundary conditions, the ever-increasing influence of human activities has been contributing to the changes in the climate system since the end of the 19th century. As a result, the ocean is not only getting warmer, but the seawater is becoming more acidic, loses its oxygen, and the sea level is rising.

GEOMAR Helmholtz Centre for Ocean Research Kiel is making an important contribution to a better understanding of the complex climate system. "Ocean and Climate" is one of the three central research topics at GEOMAR. The research spectrum ranges from natural climate fluctuations in the past to the detailed study of the current ocean system to the modelling of future climate states, which enables the assessment of possible consequences and the evaluation of climate protection and climate adaptation strategies. GEOMAR offers the best conditions for this: Scientists from a wide range of disciplines work together to investigate physical, chemical, biological or geological processes in the ocean in order to achieve a holistic view of the climate system and its changes and interactions with ecosystems.

News about Ocean and Climate

 The cover of the report; the picture shows a very small island in the sea
28.10.2026

The ocean's role in regulating the climate is under pressure

Three Helmholtz Centres contribute to new UN report on the role of the ocean in the climate system

 A woman wearing a floral blouse and with pink-dyed hair is sitting at a table opposite an elderly man in a jacket; there are microphones on the table, and through the window in the background you can see across a river.
29.09.2026

What Germany’s limited CO2 storage capacity beneath the North Sea means

GEOMAR expert Klaus Wallmann explains the current state of play regarding carbon dioxide storage beneath the sea in a video podcast and offers recommendations for action

An aerial view of a peninsula jutting out into the sea, with star-shaped groynes. On the peninsula stands a green-and-white-striped lighthouse; green meadows and a sewage treatment works can be seen in the background.
28.09.2026

Long-term CO2 sequestration: pilot project launched at the Bülk sewage treatment works

The state capital of Kiel and Planeteers are testing a method for storing carbon dioxide in the Baltic Sea, with GEOMAR providing scientific support

A view across the mudflats of the Wadden Sea at low tide
15.09.2026

Where does the methane in the Wadden Sea come from?

Research campaign investigates greenhouse gases in Meldorf Bay

A small harbour with a white and red lighthouse in the background. Mesocosms are being launched into the water along the quay; some are already floating.
08.09.2026

Construction waste for climate protection in the ocean?

New mesocosm experiment on Gran Canaria using ground concrete demolition waste