Recent anthropogenic increases in SO₂ from Asia have minimal impact on stratospheric aerosol

AMS Citation:
Neely, R. R., and Coauthors, 2013: Recent anthropogenic increases in SO₂ from Asia have minimal impact on stratospheric aerosol. Geophysical Research Letters, 40, 999-1004, doi:10.1002/grl.50263.
Date:2013-03-16
Resource Type:article
Title:Recent anthropogenic increases in SO₂ from Asia have minimal impact on stratospheric aerosol
Abstract: Observations suggest that the optical depth of the stratospheric aerosol layer between 20 and 30 km has increased 4–10% per year since 2000, which is significant for Earth's climate. Contributions to this increase both from moderate volcanic eruptions and from enhanced coal burning in Asia have been suggested. Current observations are insufficient to attribute the contribution of the different sources. Here we use a global climate model coupled to an aerosol microphysical model to partition the contribution of each. We employ model runs that include the increases in anthropogenic sulfur dioxide (SO₂) over Asia and the moderate volcanic explosive injections of SO₂ observed from 2000 to 2010. Comparison of the model results to observations reveals that moderate volcanic eruptions, rather than anthropogenic influences, are the primary source of the observed increases in stratospheric aerosol.
Peer Review:Refereed
Copyright Information:Copyright 2013 American Geophysical Union.
OpenSky citable URL: ark:/85065/d7q24142
Publisher's Version: 10.1002/grl.50263
Author(s):
  • R. Neely
  • O. Toon
  • S. Solomon
  • J.-P. Vernier
  • C. Alvarez
  • Jason English - NCAR/UCAR
  • K. Rosenlof
  • Mike Mills - NCAR/UCAR
  • Charles Bardeen - NCAR/UCAR
  • J. Daniel
  • J. Thayer
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