Abstract
AbstractDirect carbon dioxide flux measurements using eddy covariance from an icebreaker in the high‐latitude Southern Ocean and Antarctic marginal ice zone are reported. Fluxes were combined with the measured water‐air carbon dioxide partial pressure difference (ΔpCO2) to compute the air‐sea gas transfer velocity (k, normalized to Schmidt number 660). The open water data showed a quadratic relationship between k (cm h−1) and the neutral 10 m wind speed (U10n, m s−1), kopen = 0.245 U10n2 + 1.3, in close agreement with decades old tracer‐based results and much lower than cubic relationships inferred from previous open ocean eddy covariance studies. In the marginal ice zone, the effective gas transfer velocity decreased in proportion to sea ice cover, in contrast with predictions of enhanced gas exchange in the presence of sea ice. The combined open water and marginal ice zone results affect the calculated magnitude and spatial distribution of Southern Ocean carbon flux.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
