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

Nomura, Daiki; Granskog, Mats A.; Assmy, Philipp; Simizu, Daisuke; Hashida, Gen

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

Nomura, Daiki; Granskog, Mats A.; Assmy, Philipp et al.

Journal of Geophysical Research : Oceans, 2013, 118(12), 6511-6524

Permalink : https://hdl.handle.net/2115/70585

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アクセス権	open access
URI	https://hdl.handle.net/2115/70585
タイトル	Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snowmelt and surface flooding
著者	Nomura, Daiki ; Granskog, Mats A. ; Assmy, Philipp ; Simizu, Daisuke ; Hashida, Gen
e-Rad_Researcher 70550739 著者名 Nomura, Daiki
著者名 Granskog, Mats A.
著者名 Assmy, Philipp
著者名 Simizu, Daisuke
e-Rad_Researcher 00280537 著者名 Hashida, Gen
言語	英語
キーワード	sea ice
	snow
	CO2
	gas exchange
	Arctic
	Antarctic
発行日	2013-12-04
出版者	Wiley
収録物名	Journal of Geophysical Research : Oceans
巻(号)	118(12)
ページ	6511-6524
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	© 2013 American Geophysical Union
PISSN	2169-9275
EISSN	2169-9291
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1002/2013JC009048