Ocean Carbon & Biogeochemistry

IIOSC 2025 + IIOE-2 ECR opp

IIOSC – 2025, International Indian Ocean Science Conference – 2025: Celebrating 10 years of the Second International Indian Ocean Expedition 1-5 December 2025 at INCOIS, Hyderabad, India Website: https://iiosc2025.incois.gov.in/ Important Dates Abstract Submission opens: 10 Jun 2025 Abstract submission closed: 26 Aug 2025 Abstract Acceptance: 10 Sep 2025 Registration Opens: 10 Sep 2025 Last Date […]

2026 OCB Activity Proposals due Oct 24 + info webinar recording

Proposal info webinar September 23, 3-4pm This webinar featured recent successful OCB activities and their PIs, Q&A with Project Office staff on community building and what makes a successful OCB proposal and activity. Watch the webinar recording The Ocean Carbon and Biogeochemistry (OCB) Program is soliciting proposals for OCB activities that will take place or […]

2025 Call for OCB Scientific Steering Committee (SSC) nominations

OCB is seeking nominations for new Scientific Steering Committee (SSC) members, including a new early career member! The term begins in January 2026. The following SSC members are scheduled to rotate off at the end of 2025: Yige Zhang (formerly Texas A&M University) – paleoceanography and paleoclimatology; organic and stable isotope geochemistry; global biogeochemical cycles […]

OCB2025 recordings – a week of science, connection, community

Your watch recordings of the workshop on the OCB YouTube channel. Constraining the dark ocean carbon cycle: Implications for ocean carbon budgets? (Co-chairs: Anne Dekas, Anela Choy, Jeff Bowman, Randie Bundy) Rivers to coasts: Biogeochemical linkages and environmental resilience (joint with North American Carbon Program) (Co-chairs: Fei Da, Kanchan Maiti, Shaily Rahman, Libby Larson, David […]

NEW Report: Pathways Connecting Climate Changes to the Deep Ocean

Now published – workshop report from the Pathways Connecting Climate Changes to the Deep Ocean: Tracing physical, biogeochemical, and ecological signals from the surface to the deep sea A joint OCB-US CLIVAR scoping workshop This workshop will brought together observational oceanographers and modelers across physical, biogeochemical, and ecological communities to assess our understanding of pathways […]

METS RCN workshop recordings

Watch recordings from the METS RCN workshop held in April on the OCB YouTube Channel. International Workshop: FAIR Data Practices for Ship-based Marine Ecological Time Series April 22-25, 2025 (ASU/BIOS, Bermuda) Workshop report: https://www.us-ocb.org/fair-data-practices-for-marine-ecological-time-series/ More on METS RCN Workshop: https://www2.whoi.edu/site/mets-rcn/projects/fair-ship-based-ocean-time-series-international-workshop/

PAUSE on all bulk travel requests

Until further notice, OCB will not be able to consider bulk travel support requests. We will post an announcement if this changes.

New: Connecting Observations to Models

Ombres, E., H. Benway, K. Bisson, A. Larkin, L. Perotti, L. Wright-Fairbanks (eds.) (2024). Connecting Observations to Models: Biogeochemical Observing and Modeling Workshop, 2024 Summary Report and Suggested Steps Forward. Published Date: 2024 Series: NOAA technical memorandum OAR-OAP ; 6, DOI: https://doi.org/10.25923/wpdj-ja69

New workshop report: Ecological Forecasting

New workshop report from the joint OCB-US CLIVAR 2022 workshop Daily to Decadal Ecological Forecasting along North American Coastlines Capotondi, A., Coles, V. J., Clayton, S., Friedrichs, M., Gierach, M., Miller, A. J., and Stock, C. 2024. Daily to Decadal Ecological Forecasting Along North American Coastlines Workshop Report. 54pp. doi: 10.1575/1912/70991 Citable URI https://hdl.handle.net/1912/70991 Download here.

Recent Science Highlights

A Microbial Conveyor Belt Beneath the South Pacific

Global overturning circulation is a planetary conveyor belt: dense waters sink around Antarctica, spread through the deep ocean for centuries, and eventually rise elsewhere, redistributing heat, nutrients, and carbon. But how does this slow, pervasive movement of water impact marine microbes? To find out, researchers collected over 300 water samples spanning the full depth […]

Marine plant metabolites give marine microbes gas

A recent study in Nature Geosciences observed high concentrations of methane overlying permeable (sand) sand sediments in bays in Denmark and Australia. These environments are not one would expect to see methane because they are highly oxygenated and the high concentrations of sulfate in seawater typically inhibit methanogenesis. The authors showed that the methane was […]

From smoke to sea, how wildfire ash reshapes ocean microbial life

When wildfire smoke drifts over the ocean, what happens beneath the waves? As wildfires change in nature and become more frequent, it’s increasingly important to understand how ash deposition affects the ocean’s smallest, yet most essential, inhabitants. In a recent study, the authors investigated how wildfire ash leachate influences coastal microbial communities. Through field incubations […]

How does a persistent eddy impact the biological carbon pump?

The Lofoten Basin Eddy (LBE) is a unique and persistent anticyclonic feature of the Norwegian Sea that stirs the water column year-round. However, its impact on biogeochemical processes that influence region carbon storage, including carbon fixation, particle aggregation and fragmentation, and remineralization, has remained largely unknown. Using 12 years of data from Biogeochemical-Argo floats and […]

New software enables global ocean biogeochemical modeling in Python

Have you ever wondered what life would be like if you could write and run complex biogeochemical models easily and conveniently in Python? Wonder no more. In a paper published in J. Adv. Model. Earth Syst., Samar Khatiwala (2025; see reference below) describes tmm4py, a new software to enable efficient, global scale biogeochemical modelling in […]

Migrating zooplankton increase N2 production in Oxygen Deficient Zones

Diel Vertically Migrating Zooplankton that spend their day in an Oxygen Deficient Zone to avoid predators are a previously ignored source of organic matter for N2 producing bacteria. A recent study in GBC, examined biogeochemical cycling in the offshore Eastern Tropical North Pacific Oxygen Deficient Zone. They found that the daytime maximum in backscattering, used […]

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