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Winter shore (Credit: Dmitry Savelyev, distributed via imaggeo.egu.eu)

OS Ocean Sciences Division on Ocean Sciences

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European Geosciences Union

Division on Ocean Sciences
os.egu.eu

Division on Ocean Sciences

President: Joanna Staneva (Emailos@egu.eu)
Deputy President: Johan van der Molen (Email)
ECS Representative: Arianna Olivelli (Emailecs-os@egu.eu)

The Ocean Sciences (OS) Division has the major objective to provide an attractive and productive environment for scientists from Europe and all over the world to gain progress in the various ocean science disciplines and have beneficial interactions with other fields of geosciences. For that purpose, we organise with the teams of conveners the ocean science part of the program of the scientific conference that his held every year during the EGU General Assembly. We give special attention to topics cross-cutting with those of other divisions. We recognise deserving colleagues in various stages of their careers with our Award program: the division awards the Fritdjof Nansen Medal to mid or full career scientists and the Outstanding Early Career Scientists Award for researchers in the early stages of their careers. We also award prizes to outstanding student posters at every General Assembly. The division maintains very strong links with the EGU Publications Committee, and especially with the board of editors of the open access journal Ocean Science (OS). The division also collaborates with other EGU committees in the organisation of relevant topical conferences and summer schools.

Latest posts from the OS blog

Beyond wind speed: what really controls air-sea gas exchange?

When we think about what drives air-sea gas exchange (such as CO2), wind usually gets all the credit. Strong winds stir the surface, enhance turbulence, and speed up gas transfer. But a new study in Atmospheric Chemistry and Physics shows there is more to the story: CO2 exchange does not just follow the wind, it is also directly affected by surface conditions (Fig. 1). Using the eddy covariance technique in the central Baltic Sea, researchers directly measured the CO2 transfer …


New Unified Interface for Existing Ocean Carbonate Chemistry Data Products

Here is a great resource for anyone working on ocean carbon: Jiang et al. (2026) compiled a comprehensive synthesis of data products for ocean carbonate chemistry — all in one place for you! The paper provides a comprehensive synthesis of 68 existing ocean carbonate chemistry data products and data product sets, including: 🛳️ Cruise-based Compilations 📈 Time-series Datasets 🗂️ Gap-filled Observational Products 🖥️ Model-based Reconstructions The authors highlight the diversity of available products, noting differences in: 🌍 Spatial Coverage ⏱️ …


How atmospheric circulation patterns high above the Southern Ocean influence the deepest layers of the global ocean

The ocean surrounding Antarctica plays a crucial role in the climate system. Along parts of the Antarctic coast, very cold and salty water becomes dense enough to sink all the way to the ocean floor. This process forms Antarctic Bottom Water: the deepest water mass in the global ocean, representing about 40% of its total volume. As this dense water sinks into the abyss, it helps trap heat and carbon at depth and supplies oxygen to the deepest layers of …


A synergy of observations: Filling the gaps in an ocean colour chlorophyll-a record

Chlorophyll-a (chl-a), as the dominant photosynthetic pigment within phytoplankton, provides an indication of the phytoplankton biomass and are essential for understanding global and regional changes in primary production in the oceans. Multiple ocean colour satellites have unlocked routine synoptical scale observations of chl-a which now extends from 1997 to the present day. Differing numbers of satellites can be in orbit relaying observations at any one time, for example SeaWiFS was the only satellite monitoring ocean colour from 1997 until 2002 …

Recent awardees

Tillys Petit

Tillys Petit

  • 2026
  • Division Outstanding Early Career Scientist Award

The 2026 Division Outstanding Early Career Scientist Award is awarded to Tillys Petit for outstanding contributions to understanding the ocean processes that regulate the Atlantic overturning circulation, combining observations and modelling to advance climate research.


Tatiana Ilyina

Tatiana Ilyina

  • 2025
  • Fridtjof Nansen Medal

The 2025 Fridtjof Nansen Medal is awarded to Tatiana Ilyina for distinguished research in oceanography to enhance our understanding of the ocean carbon cycle and its critical role in the climate system.


Jens Terhaar

Jens Terhaar

  • 2025
  • Division Outstanding Early Career Scientist Award

The 2025 Division Outstanding Early Career Scientist Award is awarded to Jens Terhaar for outstanding research on the biogeochemistry of the ocean carbon cycle and its feedbacks on climate.


Estel Font

Estel Font

  • 2025
  • Outstanding Student and PhD candidate Presentation (OSPP) Award

The 2025 Outstanding Student and PhD candidate Presentation (OSPP) Award is awarded to Estel Font Arabian Sea Mode Water: A Key Player in Surface-to-Interior Exchange


Eun Byeol Cho

Eun Byeol Cho

  • 2025
  • Outstanding Student and PhD candidate Presentation (OSPP) Award

The 2025 Outstanding Student and PhD candidate Presentation (OSPP) Award is awarded to Eun Byeol Cho Intensifying Heat Stresses in Marine Protected Areas

Current issue of the EGU newsletter

In our April issue, we are welcoming EGU26 with a range of tools and blog posts to help you get the most out of the meeting! Also meet the managing director or EGU's publications and conference partner company Copernicus, Martin Rasmussen, as he talks about how the General Assembly has changed in the last 20 years, the EGU awards and medals are now open for nominations, discover how footprints in muddy tidal flats are helping us learn about climate change and don't miss the 15 May deadline to apply for funding to support a training school or special conference!

All this and much more, in this month's Loupe!

Current issue of the OS division newsletter

Highlights from the EGU Ocean Sciences Division