SPARC Science Update: 30 April – 22 May

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

Inter-comparison of stratospheric mean-meridional circulation and eddy mixing among six reanalysis data sets. By K. Miyazaki et al. in Atmospheric Chemistry and Physics.

ML-CIRRUS – The airborne experiment on natural cirrus and contrail cirrus with the high-altitude long-range research aircraft HALO. By C. Voigt et al. in the Bulletin of the American Meteorological Society.

Response of lightning NOx emissions and ozone production to climate change: Insights from the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP). By D.L. Finney et al. in Geophysical Research Letters.

Climate change reduces warming potential of nitrous oxide by an enhanced Brewer-Dobson circulation. By D. Kracher et al. in Geophysical Research Letters.

Ozone variability in the troposphere and the stratosphere from the first 6 years of IASI observations (2008-2013). By C. Wespes et al. in Atmospheric Chemistry and Physics.

Evaluation of UTLS carbon monoxide simulations in GMI and GEOS-Chem chemical transport models using Aura MLS observations. By L. Huang et al. in Atmospheric Chemistry and Physics.

Climatology and ENSO-related interannual variability of gravity waves in the southern hemisphere subtropical stratosphere revealed by high-resolution AIRS observations. By K. Sato et al. in the Journal of Geophysical Research.

Midlatitude cloud shifts, their primary link to the Hadley cell, and their diverse radiative effects. By G. Tselioudis et al. in Geophysical Research Letters.

An idealized stratospheric model useful for understanding differences between long-lived trace gas measurements and global chemistry-climate model output. By E.A. Ray et al. in the Journal of Geophysical Research.

Reduction of climate sensitivity to solar forcing due to stratospheric ozone feedback. By G. Chiodo and L.M. Polvani in the Journal of Climate.

Transport vs. energetic particle precipitation: Northern polar stratospheric NOx and ozone in January-March 2012. By S.-M. Päivärinta et al. in the Journal of Geophysical Research.

Kinematic and diabatic vertical velocity climatologies from a chemistry climate model. By A.M. Hoppe et al. in Atmospheric Chemistry and Physics.

Stratospheric age of air variations between 1600-2100. By S. Muthers et al. in Geophysical Research Letters.

The airborne mass spectrometer AIMS – Part 2: Measurements of trace gases with stratospheric or tropospheric origin in the UTLS. By T. Jurkat et al. in Atmospheric Measurement Techniques.

Discussion papers – open for comment

Projection of North Atlantic Oscillation and its effect on tracer transport. By S. Bacer et al. in Atmospheric Chemistry and Physics Discussions.

A laser-induced fluorescence instrument for aircraft measurements of sulfur dioxide in the upper troposphere and lower stratosphere. By A.W. Rollins et al. in Atmospheric Measurement Techniques Discussions.

The Stratospheric Water and Ozone Satellite Homogenized (SWOOSH) database: A long-term database for climate studies. By S.M. Davis et al. in Earth System Science Data Discussions.

Advancements, measurement uncertainties, and recent comparisons of the NOAA frostpoint hygrometer. By E.G. Hall et al. in Atmospheric Measurement Techniques Discussions.

Validation of ACE-FTS version 3.5 NOy species profiles using correlative satellite measurements. By P.E. Sheese et al. in Atmospheric Measurement Techniques Discussions.

Changes in the Width of the Tropical Belt due to Simple Radiative Forcing Changes in the GeoMIP Simulations. By N. Davis et al. in Atmospheric Chemistry and Physics Discussions.

Model – TCCON comparisons of column-averaged methane with a focus on the stratosphere. By A. Ostler et al. in Atmospheric Measurement Techniques Discussions.

Seasonal Variability of Stratospheric Methane: Implications for Constraining Tropospheric Methane Budgets Using Total Column Observations. By K.M. Saad et al. in Atmospheric Chemistry and Physics Discussions.

Stratospheric gravity waves at southern hemisphere orographic hotspots: 2003-2014 AIRS/Aqua observations. By L. Hoffmann et al. in Atmospheric Chemistry and Physics Discussions.

Role of vertical and horizontal mixing in the tape recorder signal near the tropical tropopause. By A.A. Granville and T. Birner in Atmospheric Chemistry and Physics Discussions.

Case Studies of the Impact of Orbital Sampling on Stratospheric Trend Detection and Derivation of Tropical Vertical Velocities: Solar Occultation versus Limb Emission Sounding. By L.F. Millán et al. in Atmospheric Chemistry and Physics Discussions.

A comparison of very short-lived halocarbon (VSLS) and DMS aircraft measurements in the Tropical West Pacific from CAST, ATTREX and CONTRAST. By S.J. Andrews et al. in Atmospheric Measurement Techniques Discussions.

Phosgene in the UTLS: seasonal and latitudinal variations from MIPAS observations. By M. Valeri et al. in Atmospheric Measurement Techniques Discussions.