SPARC Science Update: 20-26 February

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

Influence of the Quasi-Biennial Oscillation and Sea Surface Temperature Variability on Downward Wave Coupling in the Northern Hemisphere. By S.W. Lubis et al. in the Journal of Atmospheric Sciences.

Multi-year climate prediction with initialization based on 4D-Var data assimilation. By T. Mochizuki et al. in Geophysical Research Letters.

Global normal mode planetary wave activity: a study using TIMED/SABER observations from the stratosphere to the mesosphere-lower thermosphere. By S.R. John and K.K. Kumar in Climate Dynamics.

Strengthening of the Tropopause Inversion Layer During the 2009 Sudden Stratospheric Warming: A MERRA-2 Study. By K. Wargan and L. Coy in the Journal of Atmospheric Sciences.

Dynamical consistency of reanalysis data sets in the extratropical stratosphere. By P. Martineau et al. in the Journal of Climate.

Troposphere–stratosphere response to large-scale North Atlantic Ocean variability in an atmosphere/ocean coupled model. By N.E. Omrani et al. in Climate Dynamics.

Drift dynamics in a coupled model initialized for decadal forecasts. By E. Sanchez-Gomez et al. in Climate Dynamics.

Preferred response of the East Asian summer monsoon to local and non-local anthropogenic sulphur dioxide emissions. By B. Dong et al. in Climate Dynamics.

The Combined Influences of Autumnal Snow and Sea Ice on Northern Hemisphere Winters. By J.C. Furtado et al. in Geophysical Research Letters.

Evolution of stratospheric sulfate aerosol from the 1991 Pinatubo eruption: Roles of aerosol microphysical processes. By T. Sekiya et al. in the Journal of Geophysical Research: Atmospheres.

Water vapour variability in the high-latitude upper troposphere – Part 2: Impact of volcanic eruptions. By C.E. Sioris et al. in Atmospheric Chemistry and Physics.

Unexpected high 35S concentration reveals strong downward transport of stratospheric air during the monsoon transitional period in East Asia. By M. Lin et al. in Geophysical Research Letters.

Discussion papers – open for comment

Characteristics of lower stratospheric transport as inferred from the age of air spectrum. By F. Ploeger and T. Birner in Atmospheric Chemistry and Physics Discussions.

How can we understand the solar cycle signal on the Earth’s surface? By K. Kodera et al. in Atmospheric Chemistry and Physics Discussions.

Return glider radiosonde for in-situ upper-air research measurements. By A. Kräuchi and R. Philipona et al. in Atmospheric Measurement Techniques Discussions.