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

Warming Trends in Summer HeatWaves. By S.C. Chapman, N.W. Watkins, and D.A. Stainforth in the Geophysical Research Letters.

El Niño–Southern Oscillation variability, teleconnection changes and responses to large volcanic eruptions since AD 1000. By C. Dätwyler et al. in the International Journal of Climatology.

Nonlinearity in the North Pacific atmospheric response to a linear ENSO forcing. By B. Jiménez‐Esteve and D. I.V. Domeisen I the Geophysical Research Letters.

Characterization of inertia gravity waves and associated dynamics in the lower stratosphere over the Indian Antarctic station, Bharati (69.4°S, 76.2°E) during austral summers. By N. Koushik et al. in Climate Dynamics.

Updates of HITRAN spectroscopic database from 2008 to 2016 and implications for near‐infrared radiative transfer calculations. By K.P. Menang in the Quarterly Journal of the Royal Meteorological Society.

Retrieving the age of air spectrum from tracers: principle and method. By A. Podglajen and F. Ploeger in Atmospheric Chemistry and Physics.

Indian summer monsoon onset signatures on the tropical tropopause layer. By S. RavindraBabu et al. in the Atmospheric Science Letters.