Model projections of ocean acidification in the Arctic (text & video)

OA Week 2021, Arctic Hub Session Dr. Nadja Steiner, Fisheries and Oceans Canada, Canada


We will present an evaluation of regional trends in ocean acidification and accompanying environmental stressors for the Arctic. Evaluations will be presented for historical and projection runs and for a variety of CMIP5 and CMIP6 models and scenarios. The models tend to show high consistency in ocean acidification trends, but differ in their initial conditions, which leads to constant biases among the models. Model projections show little difference for different scenarios over a 10-20 year timescale, but diverge afterwards with clear differences in ocean acidification for high and low emission scenarios. Several regions show continuous aragonite undersaturation already within the historical time period (before 2015).

Ocean Acidification Week 2021 was sponsored by the following organizations:

(1) GOA-ON, the Global Ocean Acidification Observing Network,

(2) NOAA, the United States National Oceanic & Atmospheric Administration,

(3) IAEA OA-ICC, the International Atomic Energy Agency – Ocean Acidification International Coordination Centre, and

(4) IOC-UNESCO – the Intergovernmental Oceanographic Commission of the United Nations Educational, Scientific and Cultural Organization

For more information, please visit

GOA-ON, YouTube, 24 September 2021. Text and video.

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OA-ICC Highlights

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