气候变化领域集成服务门户(CCPortal): Sea ice pCO2 dynamics and air-ice CO2 fluxes during the sea ice mass balance in the Antarctic (SIMBA) experiment

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DOI	10.5194/tc-8-2395-2014
	Sea ice pCO2 dynamics and air-ice CO2 fluxes during the sea ice mass balance in the Antarctic (SIMBA) experiment &ndash; Bellingshausen sea, Antarctica
	Geilfus N.-X.; Tison J.-L.; Ackley S.F.; Galley R.J.; Rysgaard S.; Miller L.A.; Delille B.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
英文摘要	Temporal evolution of pCO2 profiles in sea ice in the Bellingshausen Sea, Antarctica, in October 2007 shows physical and thermodynamic processes controls the CO2 system in the ice. During the survey, cyclical warming and cooling strongly influenced the physical, chemical, and thermodynamic properties of the ice cover. Two sampling sites with contrasting characteristics of ice and snow thickness were sampled: one had little snow accumulation (from 8 to 25 cm) and larger temperature and salinity variations than the second site, where the snow cover was up to 38 cm thick and therefore better insulated the underlying sea ice. We show that each cooling/warming event was associated with an increase/decrease in the brine salinity, total alkalinity (TA), total dissolved inorganic carbon (TCO2), and in situ brine and bulk ice CO2 partial pressures (pCO2). Thicker snow covers reduced the amplitude of these changes: snow cover influences the sea ice carbonate system by modulating the temperature and therefore the salinity of the sea ice cover. Results indicate that pCO2 was undersaturated with respect to the atmosphere both in the in situ bulk ice (from 10 to 193 Î1/4atm) and brine (from 65 to 293 Î1/4atm), causing the sea ice to act as a sink for atmospheric CO2 (up to 2.9 mmol mg'2 dg'1), despite supersaturation of the underlying seawater (up to 462 Î1/4atm). © 2014 Author.
学科领域	air-ice interaction; carbon flux; carbonate system; dissolved inorganic carbon; mass balance; salinity; sea ice; snow accumulation; temporal analysis; thermodynamics; Antarctic Ice Sheet; Antarctica; Bellingshausen Sea; Southern Ocean
语种	英语
scopus关键词	air-ice interaction; carbon flux; carbonate system; dissolved inorganic carbon; mass balance; salinity; sea ice; snow accumulation; temporal analysis; thermodynamics; Antarctic Ice Sheet; Antarctica; Bellingshausen Sea; Southern Ocean
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119994
作者单位	Arctic Research Centre, Aarhus University, Aarhus, Denmark; Laboratoire de Glaciologie, Universite Libre de Bruxelles, Brusells, Belgium; Unite d'Oce Anographie Chimique, Universite de Liege, Liege, Belgium; Department of Geological Sciences, University of Texas at San Antonio, San Antonio, TX, United States; Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada; Greenland Climate Research Centre, Greenland Institute of Natural Resources, Nuuk, Greenland; Centre for Ocean Climate Chemistry, Institute of Ocean Sciences, Fisheries and Oceans, Sidney, BC, Canada
推荐引用方式 GB/T 7714	Geilfus N.-X.,Tison J.-L.,Ackley S.F.,et al. Sea ice pCO2 dynamics and air-ice CO2 fluxes during the sea ice mass balance in the Antarctic (SIMBA) experiment &ndash; Bellingshausen sea, Antarctica[J],2014,8(6).
APA	Geilfus N.-X..,Tison J.-L..,Ackley S.F..,Galley R.J..,Rysgaard S..,...&Delille B..(2014).Sea ice pCO2 dynamics and air-ice CO2 fluxes during the sea ice mass balance in the Antarctic (SIMBA) experiment – Bellingshausen sea, Antarctica.Cryosphere,8(6).
MLA	Geilfus N.-X.,et al."Sea ice pCO2 dynamics and air-ice CO2 fluxes during the sea ice mass balance in the Antarctic (SIMBA) experiment – Bellingshausen sea, Antarctica".Cryosphere 8.6(2014).