Global and regional trends of atmospheric sulfur.

Published

Journal Article

The profound changes in global SO2 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.

Full Text

Duke Authors

Cited Authors

  • Aas, W; Mortier, A; Bowersox, V; Cherian, R; Faluvegi, G; Fagerli, H; Hand, J; Klimont, Z; Galy-Lacaux, C; Lehmann, CMB; Myhre, CL; Myhre, G; Olivié, D; Sato, K; Quaas, J; Rao, PSP; Schulz, M; Shindell, D; Skeie, RB; Stein, A; Takemura, T; Tsyro, S; Vet, R; Xu, X

Published Date

  • January 30, 2019

Published In

Volume / Issue

  • 9 / 1

Start / End Page

  • 953 -

PubMed ID

  • 30700755

Pubmed Central ID

  • 30700755

Electronic International Standard Serial Number (EISSN)

  • 2045-2322

International Standard Serial Number (ISSN)

  • 2045-2322

Digital Object Identifier (DOI)

  • 10.1038/s41598-018-37304-0

Language

  • eng