globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-8-2395-2014
Scopus记录号: 2-s2.0-84919688055
论文题名:
Sea ice pCO2 dynamics and air-ice CO2 fluxes during the sea ice mass balance in the Antarctic (SIMBA) experiment – Bellingshausen sea, Antarctica
作者: Geilfus N; -X; , Tison J; -L; , Ackley S; F; , Galley R; J; , Rysgaard S; , Miller L; A; , Delille B
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期:6
起始页码: 2395
结束页码: 2407
语种: 英语
英文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74749
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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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

Recommended Citation:
Geilfus N,-X,, Tison J,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[J]. Cryosphere,2014-01-01,8(6)
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