Summary
This peer-reviewed study presents multi-decadal oceanographic observations documenting ocean acidification in the subarctic North Atlantic, identifying contrasting regional drivers between the Iceland and Irminger Sea. Whilst anthropogenic CO₂ accumulation occurs in both regions at high rates, the magnitude and vertical distribution of acidification are modulated by regional warming, freshening, and circulation patterns. The work contributes to understanding how regional physical oceanography and biogeochemistry interact to shape acidification trajectories in northern seas.
UK applicability
The findings are relevant to UK marine science and policy, particularly given the UK's jurisdiction over North Atlantic waters and dependence on understanding ocean acidification impacts on fisheries and marine ecosystems in subarctic regions. However, the study focuses on process-level oceanography rather than ecosystem or socioeconomic impacts specific to UK interests.
Key measures
pH, dissolved inorganic carbon (DIC), partial pressure of CO₂ (pCO₂), calcium carbonate saturation states, temperature, salinity, and water mass circulation patterns over three decades
Outcomes reported
The study analysed decadal oceanographic time-series data (1983–2013) from two subarctic Atlantic stations to quantify ocean acidification rates and identify regional physical and biogeochemical drivers. It measured changes in pH, CO₂ partial pressure, and related parameters across contrasting water masses in the Iceland and Irminger Seas.
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