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- W3189063542 abstract "Abstract Understanding the responses of air‐sea carbon dioxide (CO 2 ) flux to rapid environmental changes in the highly productive Chukchi Sea is of great significance for the climate prediction in the Arctic Ocean. Through analyzing the 1998–2015 hindcast simulation of a coupled ocean–sea ice–biogeochemical model, this study identifies that the key factors influencing oceanic carbon uptake in the Chukchi Sea vary seasonally. The effects of these seasonal carbon uptakes on the total annual carbon sink vary at different timescales. The model solution suggests that the Chukchi Sea acts as a perennial carbon sink of atmospheric CO 2 with the annual mean influx of −3.73 ± 3.90 mmol m −2 d −1 . Quantitative analyses reveal that the sea ice concentration predominates the annual cycle of air‐sea CO 2 flux, while primary production and wind speed strengthen the capacity for carbon uptake during June–July (melt season) and October–December (freeze season), respectively. The total annual carbon sink shows an increasing trend during 1998–2015 with a multi‐year average of 9.22 ± 1.93 Tg C y −1 . The carbon uptakes during June–July and August–September (open water season), which are respectively regulated by primary production and open water area at interannual scale, present significant long‐term increases and jointly determine the secular increase trend of the total annual carbon sink. Interannual CO 2 absorption during the freeze season is sensitive to the sea ice concentration and wind conditions, presenting the greatest year‐to‐year variation but insignificant long‐term trend, and modulates the interannual amplitude of the total annual carbon sink." @default.
- W3189063542 created "2021-08-16" @default.
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- W3189063542 date "2021-08-01" @default.
- W3189063542 modified "2023-10-14" @default.
- W3189063542 title "Analysis of the Seasonal and Interannual Variations of Air‐Sea CO <sub>2</sub> Flux in the Chukchi Sea Using a Coupled Ocean‐Sea Ice‐Biogeochemical Model" @default.
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- W3189063542 doi "https://doi.org/10.1029/2021jc017550" @default.
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