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

An iceberg and ice floes floating on the sea
01.12.2025

Expansion of Antarctic Bottom Water contributed to the End of the Last Ice Age

New study highlights the key role of the Southern Ocean in the Earth’s climate system

A large research vessel at sea
21.11.2025

Exploring the Links Between Climate and Volcanism

SONNE Expedition Along the Central American Volcanic Arc Sets Sail

Waves on the Sea
20.11.2025

Southern Ocean’s Heat Storage – a Possible Cause of Future ‘Heat Burps’

A modelling study shows how heat stored in the ocean could be released after centuries of global cooling

 Mesocosms (orange steel frames with transparent sheets and umbrella-like covers) float in a fjord with snow-capped mountains in the background.
17.11.2025

Marine scientists call for clear rules on Carbon Dioxide Removal methods

European Marine Board working group recommends harmonised standards for marine CDR approaches

Top view: waves rolling onto the beach, with the Ocean Pavilion logo above
07.11.2025

The Ocean’s Role at the UN Climate Conference

GEOMAR contributes to the Ocean Pavilion and signs the Belém Ocean Declaration