Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism

doi:10.5194/acp-2020-170

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-170
	Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism
	Jacinta Edebeli, Jürg C. Trachsel, Sven E. Avak, Markus Ammann, Martin Schneebeli, Anja Eichler, and Thorsten Bartels-Rausch
	2020-04-22
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	Earth's snow cover is very dynamic on diurnal time scales. The changes to the snow structure during this metamorphism have wide ranging impacts such as on 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 vapor, on the chemical reactivity of bromide in the snow. For this, the heterogeneous reactive loss of ozone at a concentration of 5–6 x 10¹² molecules cm^-3 is investigated in artificial, shock-frozen snow samples doped with 6.2 μM sodium bromide and with varying metamorphism history. The oxidation of bromide in snow is one reaction initiating polar bromine releases and ozone depletions. We find that the heterogeneous reactivity of bromide is completely absent from the air-ice interface in snow after 12 days of temperature gradient metamorphism and suggest that burial of non-volatile bromide salts occurs when the snow matrix is restructuring during metamorphism. Impacts on polar atmospheric chemistry are discussed.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/248956
专题	地球科学
推荐引用方式 GB/T 7714	Jacinta Edebeli, Jürg C. Trachsel, Sven E. Avak, Markus Ammann, Martin Schneebeli, Anja Eichler, and Thorsten Bartels-Rausch. Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism[J]. Atmospheric Chemistry and Physics,2020.
APA	Jacinta Edebeli, Jürg C. Trachsel, Sven E. Avak, Markus Ammann, Martin Schneebeli, Anja Eichler, and Thorsten Bartels-Rausch.(2020).Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism.Atmospheric Chemistry and Physics.
MLA	Jacinta Edebeli, Jürg C. Trachsel, Sven E. Avak, Markus Ammann, Martin Schneebeli, Anja Eichler, and Thorsten Bartels-Rausch."Snow heterogeneous reactivity of bromide with ozone lost during snow metamorphism".Atmospheric Chemistry and Physics (2020).