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Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snowmelt and surface flooding

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/70585

Title: Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snowmelt and surface flooding
Authors: Nomura, Daiki Browse this author →KAKEN DB
Granskog, Mats A. Browse this author
Assmy, Philipp Browse this author
Simizu, Daisuke Browse this author
Hashida, Gen Browse this author →KAKEN DB
Keywords: sea ice
snow
CO2
gas exchange
Arctic
Antarctic
Issue Date: 4-Dec-2013
Publisher: Wiley
Journal Title: Journal of Geophysical Research : Oceans
Volume: 118
Issue: 12
Start Page: 6511
End Page: 6524
Publisher DOI: 10.1002/2013JC009048
Abstract: In this study, we present evidence that Antarctic and Arctic sea ice act as sink for atmospheric CO2 during periods of snowmelt and surface flooding. The CO2 flux measured directly at the flooded sea ice surface (Fflood) constituted a net CO2 sink of −1.1 ± 0.9 mmol C m−2 d−1 (mean ± 1 SD), which was an order of magnitude higher than the flux measured at the snow‐air surface (Fsnow) and bare ice surface (Fice). The Fsnow/Fflood ratio decreased with increasing water equivalent of snow and superimposed‐ice, suggesting that the properties of snow and superimposed‐ice formation affect the magnitude of the CO2 flux. The Fsnow/Fflood ratio ranged from 0.1 to 0.5, illustrating that 50–90% of the potential flux at the flooded surface was reduced due to the presence of snow/superimposed‐ice. Hence, snow cover properties and superimposed‐ice play an important role in the CO2 fluxes across the sea ice‐snow‐atmosphere interface.
Rights: © 2013 American Geophysical Union
Type: article
URI: http://hdl.handle.net/2115/70585
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 野村 大樹

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