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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: Coline Poppeschi (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

Monitoring the Ocean’s Green Pulse: A New Global Dataset for Phytoplankton Phenology

Phytoplankton are tiny, single-celled organisms mainly found in the ocean’s sunlit surface, where they grow through photosynthesis, forming the marine food web’s base and regulating Earth’s climate by absorbing carbon dioxide. Their seasonal growth cycles—known as “blooms”—drive marine productivity and influence everything from carbon uptake to food security. But how can we track these blooms across the vast, dynamic global ocean? A new satellite-derived dataset just made that a whole lot easier. A new global tool for ocean scientists In …


Book Review: Below the Edge of Darkness by Edith Widder

Welcome to our new blog series, where we explore the fascinating world of oceanography through the lens of literature. Each post will feature book recommendations that involve the wonders of the ocean, from the imaginative realms of maritime science fiction to the educational pages of science nonfiction. Like Captain Ahab chasing Moby Dick, we’ll hunt down the best ocean literature for you. Last time we read Blue Machine – How the Ocean Shapes our World by Helen Czerski. This time …


Jens Terhaar Receives the Division Outstanding Early Career Scientist Award – About His Career and Work

Jens Terhaar received the 2025 Division Outstanding Early Career Scientist Award for his research on the ocean carbon cycle and its effects on climate. We spoke with him about his career path and the work that led to this award. Since completing his PhD in 2019, Jens has made a name for himself with many publications and outreach efforts. His work is about the ocean carbon sink, ocean biogeochemical stressors, physical oceanography, and ocean-climate interactions. Over time, he has introduced …


Tatiana Ilyina Receives the Fridtjof Nansen Medal – About Her Career and Work

Tatiana Ilyina received the Fridtjof Nansen Medal from the European Geosciences Union (EGU) for her outstanding research in oceanography. We spoke with her about her career path and the work that led to this award. Here’s what you should know about her. Tatiana Ilyina studied Meteorology/Oceanography during her PhD at the University of Hamburg, continued as a postdoc at the University of Hawaii and returned to Hamburg as a Group Leader of the Ocean Biogeochemistry Group at the MPI for …

Recent awardees

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.


Stephanie Henson

Stephanie Henson

  • 2024
  • Fridtjof Nansen Medal

The 2024 Fridtjof Nansen Medal is awarded to Stephanie Henson for outstanding research into the ocean’s role in the carbon cycle, built on her extraordinary ability to combine diverse observational data with novel biogeochemical models.


Alessandro Silvano

Alessandro Silvano

  • 2024
  • Division Outstanding Early Career Scientist Award

The 2024 Division Outstanding Early Career Scientist Award is awarded to Alessandro Silvano for outstanding research in the field of physical oceanography under ice, and ice-ocean interactions.


Álvaro Cubas

Álvaro Cubas

  • 2024
  • Outstanding Student and PhD candidate Presentation (OSPP) Award

The 2024 Outstanding Student and PhD candidate Presentation (OSPP) Award is awarded to Álvaro Cubas Microplastic trajectories and fates in the Canary Current System using TrackMPD

Current issue of the EGU newsletter

Following the General Assembly at the end of April we have combined the April and May issues to bring you all the current EGU news and events from new funding calls for Public Engagement Grants, Distinguished Lectures and Science Journalism Fellowship, to the imminent close of the nominations for 2026's Awards and Medals on the 15 June!

Learn about EGU's new science for policy Climate Hazard and Risk Task Force, prepare for your media close-up with our science-media toolkit, join a webinar celebrating 20 years of EGU journal 'Climate of the Past' on tipping points, and much more in this month's Loupe!