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

Is the Brewer-Dobson circulation increasing, or moving upward? By s. Oberländer-Hayn et al. in Geophysical Research Letters.

Impact of rising greenhouse gas concentrations on future tropical ozone and UV exposure. By S. Meul et al. in Geophysical Research Letters.

Analysis of the seasonal ozone budget and the impact of the summer monsoon on the northeastern Qinghai-Tibetan Plateau. By B. Zhu et al. in the Journal of Geophysical research: Atmospheres.

How to most effectively expand the global surface ozone observing network. By E.D. Sofen et al. in Atmospheric Chemistry and Physics.

Stratospheric sulfate geoengineering could enhance the terrestrial photosynthesis rate. By L. Xia et al. in Atmospheric Chemistry and Physics.

Fostering a collaborative atmospheric chemistry research community in the Latin America and Caribbean Region. By M. Andrade-Flores et al. in the Bulletin of the American Meteorological Society.

The SPARC Data Initiative: comparisons of CFC-11, CFC-12, HF and SF6 climatologies from international satellite limb sounders. By S. Tegtmeier et al. in Earth System Science Data.

Gridded global surface ozone metrics for atmospheric chemistry model evaluation. By E.D. Sofen et al. in Earth System Science Data.

Discussion papers – open for comment

AerGOM, an improved algorithm for stratospheric aerosol extinction retrieval from GOMOS observations. Part 1: Algorithm development. By F. Vanhellemont et al. in Atmospheric Measurement Techniques Discussions.

Influence of the sudden stratosphere warming on quasi-2 day waves. By S.Y. Gu et al. in Atmospheric Chemistry and Physics Discussions.