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

@article{Neely2013RecentAI,
  title={Recent anthropogenic increases in SO2 from Asia have minimal impact on stratospheric aerosol},
  author={Ryan R. Neely and Owen Brian Toon and Stanley C. Solomon and J. P. Vernier and Carolina {\'A}lvarez and Jason M. English and Karen H. Rosenlof and Michael J. Mills and Charles G. Bardeen and John Daniel and Jeffrey P. Thayer},
  journal={Geophysical Research Letters},
  year={2013},
  volume={40}
}
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… 

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