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Stable bromine isotopic composition of atmospheric CH3Br.
- Source :
- Tellus: Series B; 2013, Vol. 65, p1-N.PAG, 8p
- Publication Year :
- 2013
-
Abstract
- Tropospheric methyl bromide (CH<subscript>3</subscript>Br) is the largest source of bromine to the stratosphere and plays an important role in ozone depletion. Here, the first stable bromine isotope composition (δ<superscript>81</superscript>Br) of atmospheric CH<subscript>3</subscript>Br is presented. The δ<superscript>81</superscript>Br of higher concentration Stockholm samples and free air subarctic Abisko samples suggest a source/background value of −0.04±0.28‰ ranging up to +1.75±0.12‰. The Stockholm δ<superscript>81</superscript>Br versus concentration relationship corresponds to an apparent isotope enrichment factor of −4.7±3.7‰, representing the combined reaction sink. This study demonstrates the scientific potential of atmospheric δ<superscript>81</superscript>Br 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02806509
- Volume :
- 65
- Database :
- Complementary Index
- Journal :
- Tellus: Series B
- Publication Type :
- Academic Journal
- Accession number :
- 102585996
- Full Text :
- https://doi.org/10.3402/tellusb.v65i0.21040