气候变化领域集成服务门户(CCPortal): Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism

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DOI	10.5194/acp-20-13443-2020
	Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism
	Edebeli J.; Trachsel J.C.; Avak S.E.; Ammann M.; Schneebeli M.; Eichler A.; Bartels-Rausch T.
发表日期	2020
ISSN	1680-7316
起始页码	13443
结束页码	13454
卷号	20 期号:21
英文摘要	Earth's snow cover is very dynamic on diurnal timescales. The changes to the snow structure during this metamorphism have wide-ranging impacts on processes such as avalanche formation and on the capacity of surface snow to exchange trace gases with the atmosphere. Here, we investigate the influence of dry metamorphism, which involves fluxes of water vapour, on the chemical reactivity of bromide in the snow. To this end, the heterogeneous reactive loss of ozone in the dark at a concentration of 5×1012-6× 1012 molec. cm-3 is investigated in artificial, shock-frozen snow samples doped with 6.2μM sodium bromide and with varying metamorphism history. The oxidation of bromide in snow is one reaction initiating polar bromine releases and ozone depletion. We find that the heterogeneous reactivity of bromide is completely absent from the air-ice interface in snow after 12 d of temperature gradient metamorphism, and we suggest that the burial of non-volatile bromide salts occurs when the snow matrix is restructuring during metamorphism. Impacts on polar atmospheric chemistry are discussed. © Author(s) 2020.
语种	英语
scopus关键词	atmospheric chemistry; bromide; concentration (composition); ozone; snow avalanche; snow cover
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247386
作者单位	Laboratory of Environmental Chemistry, Paul Scherrer Institut, Villigen PSI, Switzerland; Swiss Federal Institute of Technology, ETH Zürich, Zurich, Switzerland; WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
推荐引用方式 GB/T 7714	Edebeli J.,Trachsel J.C.,Avak S.E.,et al. Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism[J],2020,20(21).
APA	Edebeli J..,Trachsel J.C..,Avak S.E..,Ammann M..,Schneebeli M..,...&Bartels-Rausch T..(2020).Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(21).
MLA	Edebeli J.,et al."Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.21(2020).