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EXTENDED Nominations for new OCB Subcommittee Ocean Carbonate System Intercomparison Forum (OCSIF)

We are currently seeking nominations for members of a newly established OCSIF topical subcommittee of the OCB SSC – the Ocean Carbonate System Intercomparison Forum (OCSIF). This subcommittee has its origins in the OCB OCSIF working group focused on identifying and addressing uncertainties in the seawater carbonate system and increasing measurement inter-comparability, with goals of
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New pub from the Operational Phytoplankton Observations Working Group!

New publication from the Operational Phytoplankton Observations (OPO) Working Group! Citation: Clayton, S., Neeley, A., Poulton, N., et al., (2026) Operational Phytoplankton Observations Best Practices: a guide for using imaging technologies for routine monitoring of phytoplankton communities. Version 1.0.0. Woods Hole, MA, Ocean Carbon and Biogeochemistry Program, Operational Phytoplankton Observations Working Group, 96pp. DOI: https://doi.org/10.25607/OBP-2059
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Metabarcoding Intercal webinar April 9

Join us for the first Metabarcoding Intercal webinar on April 9 at 12PM ET / 9AM PT to hear from Dr. Felix Milke, University of Oldenburg, Biogeography of Microbial Cohorts in the Global Oceans Dr. Mahwash Jamy, Uppsala University, Opportunities and Challenges in Long‑Read Metabarcoding for Ecology and Evolution — This new activity has just
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Coastal Subject Matter Experts micro-survey

Input requested for COASTAL (essentially 100km of shoreline – including inland estuarine areas) Gap Analysis Discussion Groups. This is best effort voluntary work through end of 2026. Anyone can participate, but it is being coordinated by COAST-VC for CEOS. We invite subject matter experts to give input to the 2026 CEOS-wide Coastal Gap Analysis activity. 
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GO-BGC Float Data Workshop in August 2026

SAVE THE DATE! The Global Ocean Biogeochemistry Array (GO-BGC) program will be hosting a Float Data workshop on August 17-21, 2026 at the University of Washington, Seattle, USA. The workshop will be a Hack-a-thon type workshop, where small groups will pursue a scientific question/objective using BGC-Argo data. This workshop will include a combination of an overview
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New Activity: SedMIP

A new OCB activity is underway: SedMIP: Sediment Biogeochemistry Model Intercomparison Project. Learn more and participate in this collaborative effort to systematically evaluate and improve benthic biogeochemical models: Attend the Town Hall at OSM26: TH23A: Advancing Benthic Modeling: Introducing SedBGC_MIP, a Community-Driven Model Intercomparison Initiative TUESDAY, February 24, 12:45-1:45p GMT in Hall3. The Abyss –
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In Memoriam: Frank J. Millero

With great sadness, we share the news that Frank J. Millero passed away on December 25, 2025, at the age of 86. Frank was a titan and pioneer of marine chemistry whose foundational work on the physical chemistry of natural waters reshaped our understanding of the ocean, particularly in the areas of carbon and trace
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WhatisOCB?

OCB is a dynamic network of scientists working across disciplines such as ocean chemistry, biology, and physics to understand the ocean’s role in the global carbon cycle and how marine ecosystems and biogeochemical cycles are responding to environmental change.

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