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  Multi-model study of mercury dispersion in the atmosphere: vertical and interhemispheric distribution of mercury species

Bieser, J., Slemr, F., Ambrose, J., Brenninkmeijer, C. A. M., Brooks, S., Dastoor, A., et al. (2017). Multi-model study of mercury dispersion in the atmosphere: vertical and interhemispheric distribution of mercury species. Atmospheric Chemistry and Physics, 17(11), 6925-6955. doi:10.5194/acp-17-6925-2017.

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 Creators:
Bieser, Johannes1, Author
Slemr, F.2, Author              
Ambrose, Jesse1, Author
Brenninkmeijer, C. A. M.2, Author              
Brooks, Steve1, Author
Dastoor, Ashu1, Author
DeSimone, Francesco1, Author
Ebinghaus, Ralf1, Author
Gencarelli, Christian N.1, Author
Geyer, Beate1, Author
Gratz, Lynne E.1, Author
Hedgecock, Ian M.1, Author
Jaffe, Daniel1, Author
Kelley, Paul1, Author
Lin, Che-Jen1, Author
Jaegle, Lyatt1, Author
Matthias, Volker1, Author
Ryjkov, Andrei1, Author
Selin, Noelle E.1, Author
Song, Shaojie1, Author
Travnikov, Oleg1, AuthorWeigelt, Andreas1, AuthorLuke, Winston1, AuthorRen, Xinrong1, AuthorZahn, Andreas1, AuthorYang, Xin1, AuthorZhu, Yun1, AuthorPirrone, Nicola1, Author more..
Affiliations:
1external, ou_persistent22              
2Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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 Abstract: Atmospheric chemistry and transport of mercury play a key role in the global mercury cycle. However, there are still considerable knowledge gaps concerning the fate of mercury in the atmosphere. This is the second part of a model intercomparison study investigating the impact of atmospheric chemistry and emissions on mercury in the atmosphere. While the first study focused on ground-based observations of mercury concentration and deposition, here we investigate the vertical and interhemispheric distribution and speciation of mercury from the planetary boundary layer to the lower stratosphere. So far, there have been few model studies investigating the vertical distribution of mercury, mostly focusing on single aircraft campaigns. Here, we present a first comprehensive analysis based on various aircraft observations in Europe, North America, and on intercontinental flights. The investigated models proved to be able to reproduce the distribution of total and elemental mercury concentrations in the troposphere including interhemispheric trends. One key aspect of the study is the investigation of mercury oxidation in the troposphere. We found that different chemistry schemes were better at reproducing observed oxidized mercury patterns depending on altitude. High concentrations of oxidized mercury in the upper troposphere could be reproduced with oxidation by bromine while elevated concentrations in the lower troposphere were better reproduced by OH and ozone chemistry. However, the results were not always conclusive as the physical and chemical parameterizations in the chemistry transport models also proved to have a substantial impact on model results.

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Language(s): eng - English
 Dates: 2017
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000403218700004
DOI: 10.5194/acp-17-6925-2017
 Degree: -

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Title: Atmospheric Chemistry and Physics
Source Genre: Journal
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Publ. Info: Katlenburg-Lindau, Germany : European Geosciences Union
Pages: - Volume / Issue: 17 (11) Sequence Number: - Start / End Page: 6925 - 6955 Identifier: ISSN: 1680-7316
CoNE: https://pure.mpg.de/cone/journals/resource/111030403014016