Summertime Evolution of Net Community Production and CO₂Flux in the Western Arctic Ocean

To examine seasonal and regional variabilities in metabolic status the coupling of net community production (NCP) air-sea CO2 fluxes western Arctic Ocean, we collected underway measurements surface O2/Ar partial pressure (pCO2) summers 2016 2018. With a box-model, demonstrate that accounting for local sea ice history (in addition to wind history) is important estimating NCP from biological oxygen saturation (?(O2/Ar)) polar regions. Incorporating this correction, found most exhibited positive ?(O2/Ar) negative pCO2 saturation, ?(pCO2), indicative autotrophy but with relationship between two parameters varying regionally. In heavy ice-covered areas, where gas exchange was suppressed, even minor resulted relatively high low water due limited exchange. Within marginal zone, flux magnitudes were strongly inversely correlated, suggesting an air induced primarily by removal waters. ice-free waters, varied according nutrient supply. oligotrophic Canada Basin, both small, controlled mainly On nutrient-rich Chukchi Shelf, strong, resulting great O2 release uptake. This overview its various stages ice-melt status, provides useful insight into possible biogeochemical evolution rapidly changing oceans.