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

Response of trace gases to the disrupted 2015–2016 quasi-biennial oscillation. By O.V. Tweedy et al. in Atmospheric Chemistry and Physics.

Future changes in the ozone quasi-biennial oscillation with increasing GHGs and ozone recovery in CCMI simulations. By H. Naoe et al. in the Journal of Climate.

An inter-comparison of multi-decadal observational and reanalysis data sets for global total ozone trends and variability analysis. By K. Bai et al. in the Journal of Geophysical Research: Atmospheres.

Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas. By A. Laakso et al. in Atmospheric Chemistry and Physics.

Dependence of model-simulated response to ozone depletion on stratospheric polar vortex climatology. By P. Lin et al. in Geophysical Research Letters.

Tropical circulation and precipitation response to ozone depletion and recovery. By S. Brönnimann et al. in Environmental Research Letters.

Mean age of stratospheric air derived from AirCore observations. By A. Engel et al. in Atmospheric Chemistry and Physics.

Technical note: Fu–Liou–Gu and Corti–Peter model performance evaluation for radiative retrievals from cirrus clouds. By S. Lolli et al. in Atmospheric Chemistry and Physics.

Quantifying pollution transport from the Asian monsoon anticyclone into the lower stratosphere. By F. Ploeger et al. in Atmospheric Chemistry and Physics.

Stratospheric Response to the 11-year Solar Cycle: Breaking Planetary Waves, Internal Reflection and Resonance. By H. Lu et al. in the Journal of Climate.

Untangling the annual cycle of the tropical tropopause layer with an idealized moist model. By M. Jucker and E.P. Gerber in the Journal of Climate.

Arctic stratosphere dynamical response to global warming. By A.Y. Karpechko and E. Manzini in the Journal of Climate.

Discussion papers – open for comment

Nadir ozone profile retrieval from SCIAMACHY and its application to the Antarctic ozone hole in the period 2003–2011. By S. Shah et al. in Atmospheric Measurement Techniques Discussions.

Temporal variability of tidal and gravity waves during a record long 10 day continuous lidar sounding. By K. Baumgartner et al. in Atmospheric Chemistry and Physics Discussions.

Deadline for travel support applications: 30 June 2017
Abstract submission and registration deadline: 31 August 2017

The 2017 S-RIP and the 13^th SPARC Data Assimilation workshop will be held at the ECMWF (Reading, UK) from 23-27 October 2017.

This year, S-RIP will start the week (Monday-Wednesday) followed by SPARC-DA (Wednesday-Friday), with a joint S-RIP-DA session on Wednesday.

Find more details on the website and in the 1^st circular.

Abstracts should be submitted before 16 June for this workshop to be held at ESA/ESTEC, Noordwijk, The Netherlands, on 9-10 October 2017.

Find website of the workshop "HAPS4ESA Towards an ESA Stratospheric High Altitude Pseudo-Satellites (HAPS) Programme for Earth Observation, Telecommunications and Navigation".

As part of the initiative Make Our Planet Great Again, attractive funding is available for climate research conducted in France.

The President of France, Emmanuel Macron, is inviting "every responsible citizen" to come and work in France in order to Make Our Planet Great Again.

Find more information on the initiative; find an article published in Science.

This 10-minute survey set up by the University of East Anglia Tyndall Centre for Climate Change Research will be used to develop guidance to support the communication of climate change data.

Find online survey.

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

Stratospheric ozone over the United States in summer linked to observations of convection and temperature via chlorine and bromine catalysis. By J.G. Anderson et al. in the Proceedings of the National Academy of Sciences of the United States of America.

The Asia-Pacific’s role in the emerging solar geoengineering debate. By M. Sugiyama et al. in Climatic Change.

Methods to homogenize electrochemical concentration cell (ECC) ozonesonde measurements across changes in sensing solution concentration or ozonesonde manufacturer. By T. Deshler et al. in Atmospheric Measurement Techniques.

Extending methane profiles from aircraft into the stratosphere for satellite total column validation using the ECMWF C-IFS and TOMCAT/SLIMCAT 3-D model. By S. Verma et al. in Atmospheric Chemistry and Physics.

Variations of Global Gravity Waves Derived From 14 Years of SABER Temperature Observations. By X. Liu et al. in the Journal of Geophysical Research: Atmospheres.

The relationship between lower-stratospheric ozone at southern high latitudes and sea surface temperature in the East Asian marginal seas in austral spring. By W. Tian et al. in Atmospheric Chemistry and Physics.

Delivery of halogenated very short-lived substances from the west Indian Ocean to the stratosphere during the Asian summer monsoon. By A. Fiehn et al. in Atmospheric Chemistry and Physics.

The modulation of stationary waves, and their response to climate change, by parameterized orographic drag. By A. van Niekerk et al. in the Journal of the Atmospheric Sciences.

Discussion papers – open for comment

A growing threat to the ozone layer from short-lived anthropogenic chlorocarbons. By D.E. Oram et al. in Atmospheric Chemistry and Physics Discussions.

Disentangling fast and slow responses of the East Asian summer monsoon to reflecting and absorbing aerosol forcings. By Z. Wang et al. in Atmospheric Chemistry and Physics Discussions.

Intercomparison of stratospheric temperature profiles from a ground-based microwave radiometer with other techniques. By F. Navas-Guzmán et al. in Atmospheric Chemistry and Physics Discussions.

Estimating Uncertainties in the SBUV Version 8.6 Merged Profile Ozone Dataset. By S.M. Frith et al. in Atmospheric Chemistry and Physics Discussions.

Two decades of in-situ temperature measurements in the upper troposphere and lowermost stratosphere from IAGOS long-term routine observation. By F. Berkes et al. in Atmospheric Chemistry and Physics Discussions.

Denitrification, dehydration and ozone loss during the Arctic winter 2015/2016. By F. Khosrawi et al. in Atmospheric Chemistry and Physics Discussions.

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

Large anomalies in lower stratospheric water vapour and ice during the 2015–2016 El Niño. By M.A. Avery et al. in Nature Geoscience.

Quasi-12 h inertia–gravity waves in the lower mesosphere observed by the PANSY radar at Syowa Station (39.6° E, 69.0° S). By R. Shibuya et al. in Atmospheric Chemistry and Physics.

Surface ozone in the Southern Hemisphere: 20 years of data from a site with a unique setting in El Tololo, Chile. By J.G. Anet et al. in Atmospheric Chemistry and Physics.

Recent Trends in Extreme Precipitation and Temperature over Southeastern South America: The Dominant Role of Stratospheric Ozone Depletion in CESM Large Ensemble. By Y. Wu and L.M. Polvani in the Journal of Climate.

Anthropogenic aerosol effects on East Asian winter monsoon: The role of black carbon induced Tibetan Plateau warming. By Y. Jiang et al. in the Journal of Geophysical Research: Atmospheres.

Atmospheric science: The self-cleansing ability of prehistoric air. By M.I. Hegglin in Nature.

Physical Processes Controlling the Spatial Distributions of Relative Humidity in the Tropical Tropopause Layer Over the Pacific. By E.J. Jensen et al. in the Journal of Geophysical Research: Atmospheres.

Thermodynamic and dynamic responses of the hydrological cycle to solar dimming. By J.E. Smyth et al. in Atmospheric Chemistry and Physics.

Non-stationarity in Southern Hemisphere climate variability associated with the seasonal breakdown of the stratospheric polar vortex. By N.J. Byrne et al. in the Journal of Climate.

Discussion papers – open for comment

Changing transport processes in the stratosphere by radiative heating of sulfate aerosols. By U. Niemeier and H. Schmidt in Atmospheric Chemistry and Physics Discussions.

The Evolution of Zonally Asymmetric Austral Ozone in a Chemistry Climate Model. By F. Dennison et al. in Atmospheric Chemistry and Physics Discussions.

Sensitivity of surface temperature to radiative forcing by cirrus and contrails in a radiative-convective model. By U. Schumann and B. Mayer in Atmospheric Chemistry and Physics Discussions.

Hemispheric asymmetry in stratospheric NO₂ trends. By M. Yela et al. in Atmospheric Chemistry and Physics Discussions.

Atmospheric Carbonyl Sulphide (OCS) measured remotely by FTIR solar absorption spectrometry. By G.C. Toon et al. in Atmospheric Chemistry and Physics Discussions.

Diagnosis of Local Gravity Wave Properties during a Sudden Stratospheric Warming. By L. Schoon and C. Zülicke in Atmospheric Chemistry and Physics Discussions.

The representation of solar cycle signals in stratospheric ozone. Part II: Analysis of global models. By A.C. Maycock et al. in Atmospheric Chemistry and Physics Discussions.

Multi-decadal Records of Stratospheric Composition and their Relationship to Stratospheric Circulation Change. By A.R. Douglass et al. in Atmospheric Chemistry and Physics Discussions.

On 15 May the Year of Polar Prediction (YOPP) was officially launched by the World Meteorological Organisation (WMO). From mid-2017 to mid-2019, scientists and operational forecasting centres from countries around the globe will jointly undertake intensive observation, modelling, forecast verification, and user-engagement activities in the Arctic and Antarctic.

This two-year international effort, which aims to close existing gaps in polar forecasting capacity, will lead to better forecasts of weather, sea-ice conditions, and climate, thus improving future environmental safety at both poles. Improved forecasts in polar regions are also expected to result in better predictions for lower latitudes, where most people live. The Year of Polar Prediction was initiated by WMO in response to rapid polar climate change and related transformation of societal and economic activities.

SPARC coordinated research on atmospheric chemistry and dynamics over the poles represents an essential contribution to YOPP, see for instance the Polar Stratospheric Clouds activity and the Polar Climate Predictability Initiative, amongst others.

Find more information on YOPP here.

The deadline is 23 June 2017.

The National Academies of Sciences, Engineering, and Medicine is seeking nominations for individuals to serve on the Board on Atmospheric Sciences and Climate (BASC). BASC is the focal point within the National Academies for activities related to the atmospheric, meteorological, and climate sciences, including issues related to technology, policy, applications, and services. The Board serves as a source for objective, independent advice to the federal government and others. Through its board meetings, study committees, and convening functions, BASC strives to:

• advance understanding of atmospheric science, meteorology, and climate;
• foster application of this knowledge to benefit the public;
• guide US research programs so they address key scientific opportunities and the needs of the nation; and
• ensure that the voice of the science community is considered in government planning and decision making.

Activities include program and document reviews, assistance in setting priorities and identifying research opportunities, evaluation of technologies and methodologies, analyses of controversial and nationally important topics, integration of interdisciplinary information, and other tasks.

BASC’s membership is broadly constituted to include experts in atmospheric composition and chemistry, meteorological sciences, climate variability and change, atmospheric interactions with the land/ocean/cryosphere, and observing and forecasting systems and approaches, as well as those with other types of relevant, practical experience.

Members typically serve 3-year terms with an option to reappoint after the first term. Nominations are sought for the next rotation in membership to be conducted later this summer.

This is a great chance to give direction to future atmospheric and climate sciences in the US! The deadline for nominations is Friday, June 23.

Submit a nomination.

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

Estimation of gravity wave parameters to alleviate the delay in the Antarctic vortex breakup in general circulation models. By G. Scheffler and M. Pulido in the Quarterly Journal of the Royal Meteorological Society.

Energy spectra and inertia-gravity waves in global analyses. By N. Zagar et al. in the Journal of the Atmospheric Sciences.

A global enhancement of hydrogen cyanide in the lower stratosphere throughout 2016. By P.E. Sheese et al. in Geophysical Research Letters.

Depletion of ozone and reservoir species of chlorine and nitrogen oxide in the lower Antarctic polar vortex measured from aircraft. By T. Jurkat et al. in Geophysical Research Letters.

Internal Variability in Simulated and Observed Tropical Tropospheric Temperature Trends. By L. Suárez-Gutiérrez et al. in Geophysical Research Letters.

Madden-Julian Oscillation Prediction and Teleconnections in the S2S Database. By F. Vitart in the Quarterly Journal of the Royal Meteorological Society.

Eddy-driven jet sensitivity to diabatic heating in an idealized GCM. By H.S. Baker et al. in the Journal of Climate.

Key issues for seamless integrated chemistry-meteorology modeling. By A. Baklanov et al. in the Bulletin of the American Meteorological Society.

Discussion papers – open for comment

Diurnal variations of BrONO₂ observed by MIPAS-B at mid-latitudes and in the Arctic. By G. Wetzel et al. in Atmospheric Chemistry and Physics Discussions.

Heterogeneous reaction of HO₂ with airborne TiO₂ particles and its implication for climate change mitigation strategies. By D.R. Moon et al. in Atmospheric Chemistry and Physics Discussions.

Reanalysis comparisons of upper tropospheric/lower stratospheric jets and multiple tropopauses. By G.L. Manney et al. in Atmospheric Chemistry and Physics Discussions.

Ozone Comparison between Pandora #34, Dobson #061, OMI, and OMPS at Boulder Colorado for the period December 2013–December 2016. By J. Herman et al. in Atmospheric Measurement Techniques Discussions.

Diagnosing CH₄ models using the equivalent length in the stratosphere. By Z. Wang et al. in Atmospheric Chemistry and Physics Discussions.

Assessment of upper tropospheric and stratospheric water vapour and ozone in reanalyses as part of S-RIP. By S.M. Davis et al. in Atmospheric Chemistry and Physics Discussions.

Assessing stratospheric transport in the CMAM30 simulations using ACE-FTS measurements. By F. Kolonjari et al. in Atmospheric Chemistry and Physics Discussions.

Vertical profile of tropospheric ozone derived from synergetic retrieval using three different wavelength ranges, UV, IR, and Microwave: sensitivity study for satellite observation. By Y. Kasai et al. in Atmospheric Measurement Techniques Discussions.