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Stable bromine isotopic composition of atmospheric CH3Br
Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM).
Stockholms universitet, Institutionen för geologiska vetenskaper.ORCID-id: 0000-0002-5640-6419
Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM).
Vise andre og tillknytning
Rekke forfattare: 6
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2013 (engelsk)Inngår i: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 65, artikkel-id 21040Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Tropospheric methyl bromide (CH3Br) is the largest source of bromine to the stratosphere and plays an important role in ozone depletion. Here, the first stable bromine isotope composition (delta Br-81) of atmospheric CH3Br is presented. The delta Br-81 of higher concentration Stockholm samples and free air subarctic Abisko samples suggest a source/background value of -0.04 +/- 0.28 parts per thousand ranging up to +1.75 +/- 0.12 parts per thousand. The Stockholm delta Br-81 versus concentration relationship corresponds to an apparent isotope enrichment factor of -4.7 +/- 3.7 parts per thousand, representing the combined reaction sink. This study demonstrates the scientific potential of atmospheric delta Br-81 measurements, which in the future may be combined with other isotope systems in a top-down inverse approach to further understand key source and sink processes of methyl bromide.

sted, utgiver, år, opplag, sider
2013. Vol. 65, artikkel-id 21040
Emneord [en]
tropospheric methyl bromide, 81Br/79Br, bromine isotopes, halogens, Stordalen, Arctic, ICPMS
HSV kategori
Identifikatorer
URN: urn:nbn:se:polar:diva-8315DOI: 10.3402/tellusb.v65i0.21040ISI: 000324546700001OAI: oai:DiVA.org:polar-8315DiVA, id: diva2:1385216
Merknad

AuthorCount:6;

Tilgjengelig fra: 2013-10-16 Laget: 2020-01-13

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Thornton, Brett F.
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