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

Interpol-IAGOS: a new method for assessing long-term chemistry–climate simulations in the UTLS based on IAGOS data, and its application to the MOCAGE CCMI REF-C1SD simulation. By Y. Cohen et al., in Geoscientific Model Development.

Disrupted Stratospheric QBO signatures in the Diurnal Tides over the low‐latitude MLT region. By M. Pramitha et al., in the Geophysical Research Letters.

Eastward‐Propagating Planetary Waves Prior to the January 2009 Sudden Stratospheric Warming. By C.T. Rhodes et al., in the Journal of Geophysical Research: Atmospheres.

How does a Pinatubo‐size Volcanic Cloud Reach the Middle Stratosphere? By G. Stenchikov et al., in the Journal of Geophysical Research: Atmospheres.