Summary
This study synthesises multinational shipboard underway measurements and calculated surface water CO2 data to produce comprehensive monthly maps of Arctic air–sea CO2 flux from 1997 to 2013. Using self-organising map techniques, the authors quantified the Arctic Ocean as a robust carbon sink (~180 TgC yr⁻¹) and identified substantial seasonal variation in CO2 uptake across the basin. The work establishes a detailed baseline for understanding Arctic ocean carbon cycling and its role in global climate regulation.
UK applicability
Whilst this study focuses on Arctic waters beyond UK jurisdiction, the findings contribute to understanding global ocean carbon dynamics and climate regulation mechanisms relevant to UK climate policy and marine science. The methodological approach to mapping seasonal CO2 flux variation may inform monitoring strategies for UK and North Atlantic waters.
Key measures
Monthly air–sea CO2 flux maps (north of 60°N); basin-wide carbon sequestration rate (TgC yr⁻¹); seasonal and interannual variability in CO2 sink strength
Outcomes reported
The study quantified air–sea CO2 flux across the Arctic Ocean north of 60°N using synthesised shipboard measurements and calculated surface water CO2 data, producing 204 monthly maps spanning 1997–2013. Basin-wide CO2 sink behaviour and substantial seasonal variation were documented, with the Arctic Ocean estimated to sequester approximately 180 TgC yr⁻¹.
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