A selection of new science articles of interest to the SPARC community from the past week (A SPARC Office choice).

Total volcanic stratospheric aerosol optical depths and implications for global climate change. By D.A. Ridley et al. in Geophysical Research Letters.

Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics. By W. Woiwode et al. in Atmospheric Chemistry and Physics.

Variations of stratospheric water vapor over the past three decades. By A.E. Dessler et al. in the Journal of Geophysical Research: Atmospheres.

Recent Northern Hemisphere stratospheric HCl increase due to atmospheric circulation changes. By E. Mahieu et al. in Nature.

Lidar-observed enhancement of aerosols in the upper troposphere and lower stratosphere over the Tibetan Plateau induced by the Nabro volcano eruption. By Q.S. He et al. in Atmospheric Chemistry and Physics.

MIPAS temperature from the stratosphere to the lower thermosphere: Comparison of vM21 with ACE-FTS, MLS, OSIRIS, SABER, SOFIE and lidar measurements. By M. García-Comas et al. in Atmospheric Measurement Techniques.