11th edition of the Copernicus Ocean State Report (OSR11)
11th edition of the Copernicus Ocean State Report (OSR11)
Editor(s): Marilaure Grégoire (University of Liège, Belgium), Pierre Brasseur (CNRS, France), Gilles Garric (Mercator Ocean International, France​​​​​​​), Johannes Karstensen (GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany), Piero Lionello (University of Salento, Italy), Marta Marcos (University of the Balearic Islands, Spain), Pierre-Marie Poulain (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Italy), and Joanna Staneva (Helmholtz-Zentrum Hereon, Germany)
As part of the Copernicus Marine Service, the annual Copernicus Ocean State Report (OSR) launched in 2015 is the key tool of its ocean reporting framework. The OSR reports on the state, variability, and ongoing changes in the marine environment of the global ocean and the European regional seas over the past decades up to close to real time. Using observation-based (remote sensing, in situ) and ocean reanalysis data, the OSR provides a comprehensive 4-dimensional (latitude, longitude, depth, and time) analysis of the Blue, Green, and White Ocean. The OSR is intended to act as a reference, providing a unique ocean monitoring dashboard for the scientific community and for policy makers and others with decision making responsibilities.

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13 Aug 2026
The pause of a decade-long warm water state of central Scotian Shelf in 2024–2025
Youyu Lu, Li Zhai, Xianmin Hu, Chantelle Layton, David Brickman, Blair Greenan, and Gilles Garric
State Planet Discuss., https://doi.org/10.5194/sp-2026-26,https://doi.org/10.5194/sp-2026-26, 2026
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12 Aug 2026
Global evolution of the particulate organic carbon in open and coastal ocean over the last 28 years
Hubert Loisel, Daniel Schaffer Ferreira Jorge, Marine Bretagnon, Philippe Bryère, Quentin Q. Jutard, Antoine Mangin, Lucile Duforêt-Gaurier, Xavier Mériaux, Alain Fumenia, Manh Duy Tran, and Vincent Vantrepotte
State Planet Discuss., https://doi.org/10.5194/sp-2026-22,https://doi.org/10.5194/sp-2026-22, 2026
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11 Aug 2026
Bottom oxygen in the North-East Atlantic seas
Elodie Gutknecht, Bruno Levier, Romain Escudier, Guillaume Reffray, Sylvain Cailleau, Stefano Ciavatta, Muriel Lux, Michelle Devlin, Lisette Enserink, Naomi Greenwood, and Hjalte Parner
State Planet Discuss., https://doi.org/10.5194/sp-2026-8,https://doi.org/10.5194/sp-2026-8, 2026
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10 Aug 2026
Fish kills in the western Baltic Sea: Analysing the extent and impact of coastal hypoxia
Lena Spruch, Anja Lindenthal, Peter Holtermann, Simon Jandt-Scheelke, Arjun Kumar, Michael Naumann, and Uwe Krumme
State Planet Discuss., https://doi.org/10.5194/sp-2026-16,https://doi.org/10.5194/sp-2026-16, 2026
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05 Aug 2026
Decadal Weakening of Pacific Abyssal Overturning Transport into the Philippine Basin Terminus
Weidong Ma, Jianing Wang, Fan Wang, Gilles Garric, and Youyu Lu
State Planet Discuss., https://doi.org/10.5194/sp-2026-6,https://doi.org/10.5194/sp-2026-6, 2026
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30 Jul 2026
Long-Term Freshwater Content Variability in the Black Sea from a Regional Reanalysis
Filipe Costa, Ehsan Sadighrad, Leonardo Lima, Ali Aydoğdu, Mehmet Ilicak, Diana Azevedo, and Emanuela Clementi
State Planet Discuss., https://doi.org/10.5194/sp-2026-17,https://doi.org/10.5194/sp-2026-17, 2026
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30 Jul 2026
Are Irish waters warming? An investigation into changes of sea surface temperature on regional scales
Catherine O'Beirne, Gerard D. McCarthy, and Samantha Hallam
State Planet Discuss., https://doi.org/10.5194/sp-2026-13,https://doi.org/10.5194/sp-2026-13, 2026
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28 Jul 2026
Applying Oceanographic Indicators for Marine Conservation off the East Coast of Canada
Gordana Lazin, Michael Patrick Casey, Rémi Mathieu Daigle, Patrick John David Upson, Youyu Lu, Ryan Ronald Edward Stanley, and Hui Shen
State Planet Discuss., https://doi.org/10.5194/sp-2026-10,https://doi.org/10.5194/sp-2026-10, 2026
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22 Jul 2026
A novel Ocean Monitoring Indicator for Extreme Sea Level Trend Along the Mediterranean Coastal Area
Anna Chiara Goglio, Lorenzo Mentaschi, Begoña Pérez Gómez, Paolo Oddo, Emanuela Clementi, and Federica Borile
State Planet Discuss., https://doi.org/10.5194/sp-2026-7,https://doi.org/10.5194/sp-2026-7, 2026
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21 Jul 2026
Long-term "rejuvenation" of the Arctic Sea Ice
Anton Korosov, Jonathan Rheinlænder, Richard Davy, François Massonnet, and David Babb
State Planet Discuss., https://doi.org/10.5194/sp-2026-5,https://doi.org/10.5194/sp-2026-5, 2026
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20 Jul 2026
Spatiotemporal variation of ocean heat content of the Baltic Sea
Ali Hayatijozani, Amirhossein Barzandeh, Ilja Maljutenko, Priidik Lagemaa, and Urmas Raudsepp
State Planet Discuss., https://doi.org/10.5194/sp-2026-4,https://doi.org/10.5194/sp-2026-4, 2026
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17 Jul 2026
Drivers of the record summer 2025 marine heatwave in western Norway
Silvana Gonzalez, Mari F. Jensen, Ingrid A. Johnsen, Randi Ingvaldsen, Jon Albretsen, Lars Asplin, Anne Sandvik, Vidar S. Lien, Solfrid Sætre Hjøllo, and Anne Britt Sandø
State Planet Discuss., https://doi.org/10.5194/sp-2026-2,https://doi.org/10.5194/sp-2026-2, 2026
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