The RD2 within the research strategy - from the ocean to the atmosphere

Test of an artificial upwelling pump south off the Canary Islands

Photo: Michael Sswat, GEOMAR

Biogeochemical Modelling

Icons and Concepts: Iris Kriest, GEOMAR // Drawings: Mariana Hill Cruz, GEOMAR
Photos: Sarah Lee, unsplash // Icons: apple

Technicians deploying the CTD into the South Pacific Ocean during cruise SO289

Photo: Nico Fröhberg, Constructor University Bremen

Sediment trap deployment during expedition S0305

Photo: Tjark Andersch, Hamburg University

Coring and sensor platforms for sampling and monitoring the ocean floor is transported on deck of RV POSEIDON to the deployment location in British North Sea

Photo: Peter Linke, GEOMAR

The RD2 Mission

The Research Division Marine Biogeochemistry studies interactions between sediment, oceanic, and atmospheric material reservoirs and the organisms including humans which impacts marine biogeochemical processes addressing the following overreaching research questions:

  • What are the impacts of climate change on marine biogeochemistry including feedbacks?
  • How do changes in marine communities alter biogeochemical processes?
  • What are the natural drivers of CO2 uptake and sequestration and what are options for enhancing marine CO2 removal?
  • How do human use and misuse of the ocean affect marine biogeochemistry and what are the options for remediation?

The scientific research of the four research units are embedded in the research program 'Changing Earth - Sustaining our Future', here mainly in topic 6, and the GEOMAR 2030 strategy with its Core Themes and Integrative Research Foci (IRFs).

The RD2 Core Areas: 4 Research Units

RD2 News

Wave. It has white foam. On the sea.
20.01.2026

Ventilation of the North Atlantic is Weakening

Slower renewal of deep waters may signal climate change

A sailing boat, or rather a racing yacht, on the sea
15.01.2026

Sailboat measurements improve estimates of ocean CO2 uptake

During training cruises and regattas, sailors collect valuable data for climate research at sea

A ship is moored to the harbour wall with ropes. The sky is blue.
13.01.2026

Time series in the Mediterranean Sea

Expedition M216 investigates changes in the Mediterranean