Summary
This study presents an improved quantification of Arctic Ocean CO₂ sequestration by incorporating satellite chlorophyll a data into self-organising map models of surface water pCO₂. The authors demonstrate that biological productivity is a meaningful predictor of CO₂ uptake variation, with relationships that vary seasonally and regionally across Arctic waters from 1997–2014. The integration of biological and physical oceanographic variables enhances the reliability and spatial–temporal resolution of regional CO₂ flux estimates.
UK applicability
Whilst this research focuses on Arctic waters rather than UK coastal or shelf seas, the methodological approach of combining chlorophyll data with pCO₂ modelling could inform UK marine carbon monitoring and climate change assessments. The findings are relevant to understanding high-latitude ocean carbon cycling and may inform UK participation in international Arctic research and climate policy.
Key measures
Air–sea CO₂ flux (mol m⁻² year⁻¹); partial pressure of CO₂ in seawater (pCO₂w); satellite chlorophyll a concentrations; seasonal and regional variation in CO₂ uptake across Arctic waters
Outcomes reported
The study quantified multiyear Arctic Ocean CO₂ uptake from 1997–2014 by integrating satellite-derived chlorophyll a concentrations into self-organising map models of surface water pCO₂. The research demonstrates that biological productivity parameters significantly improve spatial and temporal resolution of regional air–sea CO₂ flux estimates.
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