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Title :Global and regional trends of atmospheric sulfur
Authors :Aas, Wenche
Mortier, Augustin
Bowersox, Van
Cherian, Ribu
Faluvegi, Greg
Fagerli, Hilde
Hand, Jenny
Klimont, Zbigniew
Galy-Lacaux, Corinne
Lehmann, Christopher M. B.
Myhre, Cathrine Lund
Myhre, Gunnar
Olivie, Dirk
Sato, Keiichi
Quaas, Johannes
Rao, P. S. P.
Schulz, Michael
Shindell, Drew
Skeie, Ragnhild B.
Stein, Ariel
Takemura, Toshihiko
Tsyro, Svetlana
Vet, Robert
Xu, Xiaobin
Issue Date :30-Jan-2019
Abstract :The profound changes in global SO_2 emissions over the last decades have affected atmospheric composition on a regional and global scale with large impact on air quality, atmospheric deposition and the radiative forcing of sulfate aerosols. Reproduction of historical atmospheric pollution levels based on global aerosol models and emission changes is crucial to prove that such models are able to predict future scenarios. Here, we analyze consistency of trends in observations of sulfur components in air and precipitation from major regional networks and estimates from six different global aerosol models from 1990 until 2015. There are large interregional differences in the sulfur trends consistently captured by the models and observations, especially for North America and Europe. Europe had the largest reductions in sulfur emissions in the first part of the period while the highest reduction came later in North America and East Asia. The uncertainties in both the emissions and the representativity of the observations are larger in Asia. However, emissions from East Asia clearly increased from 2000 to 2005 followed by a decrease, while in India a steady increase over the whole period has been observed and modelled. The agreement between a bottom-up approach, which uses emissions and process-based chemical transport models, with independent observations gives an improved confidence in the understanding of the atmospheric sulfur budget.
URL :https://doi.org/10.1038/s41598-018-37304-0
Type Local :雑誌掲載論文
ISSN :2045-2322
Publisher :Springer Nature
URI :http://hdl.handle.net/20.500.12000/47245
Citation :Scientific Reports Vol.9
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Medicine)

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