A contribution from the SSiRC activity
The SPARC Stratospheric Sulfur and its Role in Climate (SSiRC) activity has contributed significantly to a recent overview publication on observations of stratospheric aerosol. The article can be found here: http://onlinelibrary.wiley.com/doi/10.1002/2015RG000511/full
And was highlighted in EOS here: https://eos.org/editors-vox/blowin-in-the-wind-observing-stratospheric-aerosols and here: https://eos.org/research-spotlights/decade-progress-stratospheric-aerosol-research.