The latest policy informing brief by the Flanders Marine Institute (VLIZ) highlights the concept of carbon accounting within the marine context. What are the main challenges and opportunities? What is the potential climatic importance of sediment-bound organic carbon in shallow seas, such as the North Sea? What role can the Oceans Network of the Integrated Carbon Observation System (ICOS) play in promoting workable and reliable marine carbon accounting practices? You can read all about it in this publication, downloadable from the VLIZ website.