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

Global modeling studies of composition and decadal trends of the Asian Tropopause Aerosol Layer. By A. Bossolasco et al. in Atmospheric Chemistry and Physics.

The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America. By M.L. Breeden et al. in Atmospheric Chemistry and Physics.

Summer Monsoons: Regional Manifestations of a Global System. By R. Green, S. Bordoni, and D. Battisti in Earth and Space Science News; Editor’s Vox.

Discussion papers – open for comment:

Arctic on the verge of an ozone hole? By J. Kuttippurath et al. in Atmospheric Chemistry and Physics.

Ozone super recovery cancelled in the Antarctic upper stratosphere. By V. Maliniemi et al. in Atmospheric Chemistry and Physics.

Calibrating a global atmospheric chemistry transport model using Gaussian process emulation and ground-level concentrations of ozone and carbon monoxide. By E. Ryan and O. Wild in Geoscientific Model Development.