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

Modification of the gravity wave parameterization in the Whole Atmosphere Community Climate Model: Motivation and results. By R.R. Garcia et al. in the Journal of the Atmospheric Sciences.

HF Radar Observations of a Quasi Biennial Oscillation in Mid-Latitude Mesospheric Winds. By G. Malhotra et al. in the Journal of Geophysical Research: Atmospheres.

Geoengineering with stratospheric aerosols: What don’t we know after a decade of research? By D.G. MacMartin et al. in Earth’s Future.

Nonlinear response of mid-latitude weather to the changing Arctic. By J.E. Overland et al. in Nature Climate Change.

Decadal variability of European sea level extremes in relation to the solar activity. By A. Martinez-Asensio et al. in Geophysical Research Letters.

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.

Discussion papers – open for comment

The role of methane in projections of 21st century stratospheric water vapour. By L.E. Revell et al. in Atmospheric Chemistry and Physics Discussions.

Impact of typhoons on the composition of the upper troposphere within the Asian summer monsoon anticyclone: the SWOP campaign in Lhasa 2013. By D. Li et al. in Atmospheric Chemistry and Physics Discussions.

Global large-scale stratosphere-troposphere exchange in modern reanalyses. By A.C. Boothe and C.R. Homeyer in Atmospheric Chemistry and Physics Discussions.

Stratospheric Variability at a glance – Analysis of the intra decadal timescale and the QBO. By D. Cai et al. in Atmospheric Chemistry and Physics Discussions.

Global Atmosphere Watch finds that high greenhouse gas levels mark the start of new era of climate reality.

According to the latest WMO annual Greenhouse Gas Bulletin issued by the Global Atmosphere Watch, globally averaged concentration of carbon dioxide in the atmosphere reached the symbolic and significant milestone of 400 parts per million for the first time in 2015 and surged again to new records in 2016 on the back of the very powerful El Niño event.

Find WMO media release, find WMO Greenhouse Gas Bulletin.

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

Earth System Science Frontiers – an ECS perspective. By the Young -Earth System- Scientists (YESS) in the Bulletin of the American Meteorological Society.

Observed Changes in the Southern Hemispheric Circulation in May. By D.J. Ivy et al. in the Bulletin of the American Meteorological Society.

Skilful predictions of the winter North Atlantic Oscillation one year ahead. By N. Dunstone et al. in Nature Geoscience.

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

Barotropic and Baroclinic Eddy Feedbacks in the Midlatitude Jet Variability and Responses to Climate Change-Like Thermal Forcings. By D.A. Burrows et al. in the Journal of the Atmospheric Sciences.

Emissions of carbon tetrachloride from Europe. By F. Graziosi et al. Atmospheric Chemistry and Physics.

Spatially Continuous Mapping of Daily Global Ozone Distribution (2004–2014) with the Aura OMI Sensor. By X. Peng et al. in the Journal of Geophysical Research: Atmospheres.

Version 1.3 AIM SOFIE measured methane (CH₄): Validation and Seasonal Climatology. By P. Rong et al. in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment

Extending methane profiles from aircraft into the stratosphere for satellite total column validation: A comparative analysis of different data sources. By S. Verma et al. in Atmospheric Chemistry and Physics Discussions.

Merged ozone profiles from four MIPAS Processors. By A. Laeng et al. in Atmospheric Measurement Techniques Discussions.

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

Sensitivity of Simulated Mesospheric Transport of Nitrogen Oxides to Parameterized Gravity Waves. By K. Meraner et al. in the Journal of Geophysical Research: Atmospheres.

The Kinetics of the ClOOCl Catalytic Cycle. By T.P. Canty et al. in the Journal of Geophysical Research: Atmospheres.

Trends of tropical tropospheric ozone from 20 years of European satellite measurements and perspectives for the Sentinel-5 Precursor. By K.-P. Heue et al. in Atmospheric Measurement Techniques.

Discussion papers – open for comment

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

Characterization of the Long-term Radiosonde Temperature Biases in the Lower Stratosphere using COSMIC and Metop-A/GRAS Data from 2006 to 2014. By S.-P. Ho et al. in Atmospheric Chemistry and Physics Discussions.

30-year lidar observations of the stratospheric aerosol layer state over Tomsk (Western Siberia, Russia). By V.V. Zuev et al. in Atmospheric Chemistry and Physics Discussions.

Jeju Island, Korea, 18-22 September

The 2017 COSPAR Symposium is the third of a new series of events initiated by COSPAR which aims to promote space research at a regional level in emerging countries.

The Symposium is multidisciplinary in nature and addresses topics ranging from astronomy, earth observation, planetology, astrobiology up to citizen science. The Symposium features plenary lectures, parallel and poster sessions, as well as training sessions. It is open to participants worldwide. The general topic for the third Symposium is “Small Satellites for Space Research”.

Symposium information and abstract submission: http://cospar.kasi.re.kr/cospar-symposium-2017

Download 3^rd COSPAR Symposium 1^st Announcement and COSPAR Symposium leaflet.

Abstract submission will open on 7 November,and the deadline is 31 March 2017.

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

Storm track shifts under climate change: toward a mechanistic understanding using baroclinic mean available potential energy. By C. Mbengue and T. Schneider in the Journal of the Atmospheric Sciences.

A model providing long-term datasets of energetic electron precipitation during geomagnetic storms. By M. van der Kamp et al. in the Journal of Geophysical Research: Atmospheres.

Isotopic ordering in atmospheric O₂ as a tracer of ozone photochemistry and the tropical atmosphere. By L.Y. Yeung et al. in the Journal of Geophysical Research: Atmospheres.

Phase-speed spectra of eddy tracer fluxes linked to isentropic stirring and mixing in the upper troposphere and lower stratosphere. By M. Abalos et al. in the Journal of the Atmospheric Sciences.

Winter Warming and Summer Monsoon Reduction after Volcanic Eruptions in Coupled Model Intercomparison Project 5 (CMIP5) Simulations. By B. Zambri and A. Robock in Geophysical Research Letters.

Discussion papers – open for comment

Impact of biogenic very short-lived bromine on the Antarctic ozone hole during the 21st century. By R.P. Fernandez et al. in Atmospheric Chemistry and Physics Discussions.

Stratospheric tropical warming event and its impact on the polar and tropical troposphere. By K. Kodera 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).

Heterogeneous kinetics of H₂O, HNO₃ and HCl on HNO3 hydrates (α-NAT, β-NAT, NAD) in the range 175–200 K. By R. Iannarelli and M.J. Rossi in Atmospheric Chemistry and Physics.

Contrasting Upper and Lower Atmospheric Metrics of Tropical Expansion in the Southern Hemisphere. By A. Solomon et al. in the Journal of Geophysical Research: Atmospheres.

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

Future Arctic ozone recovery: the importance of chemistry and dynamics. By E.M. Bednarz et al. in Atmospheric Chemistry and Physics.

Influence of topography on temperature variations in the tropical tropopause layer. By H. Kubokawa et al in the Journal of Geophysical Research: Atmospheres.

Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations. By S.M. Khaykin et al. in Atmospheric Chemistry and Physics.

A mechanism to explain the variations of tropopause and tropopause inversion layer in the Arctic region during a sudden stratospheric warming in 2009. By R. Wang et al. in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment

Variability and evolution of mid-latitude stratospheric aerosol budget from 22 years of ground-based lidar and satellite observations. By S.M. Khaykin et al. in Atmospheric Chemistry and Physics Discussions.

AirCore-HR: A high resolution column sampling to enhance the vertical description of CH₄ and CO₂. By O. Membrive et al. in Atmospheric Measurement Techniques Discussions.

A Sudden Stratospheric Warming Compendium. By A.H. Butler et al. in Earth System Science Data Discussions.

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

The tropical tropopause inversion layer: variability and modulation by equatorial waves. By R.P. Kedzierski et al in Atmospheric Chemistry and Physics.

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

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.

The Mid-latitude Lower-Stratospheric Mountain Wave “Valve Layer”. By C.G. Kruse et al. in the Journal of the Atmospheric Sciences.

Aerosol Effects on Summer Monsoon over Asia during 1980s and 1990s. By I.-C. Tsai et al. in the Journal of Geophysical Research: Atmospheres.

AerGOM, an improved algorithm for stratospheric aerosol extinction retrieval from GOMOS observations – Part 1: Algorithm description. By F. Vanhellemont et al. in Atmospheric Measurement Techniques.

AerGOM, an improved algorithm for stratospheric aerosol extinction retrieval from GOMOS observations – Part 2: Intercomparisons. By C.E. Robert et al. in Atmospheric Measurement Techniques.

Detection of deep stratospheric intrusions by cosmogenic ³⁵S. By M. Lin et al. in Proceedings of the National Academy of Sciences of the United States of America.

Do strong warm ENSO events control the phase of the stratospheric QBO? By B. Christiansen et al. in Geophysical Research Letters.

Changes in meandering of the Northern Hemisphere circulation. By G. Di Capua and D. Coumou in Environmental Research Letters.

Discussion papers – open for comment

Observed versus simulated mountain waves over Scandinavia – improvement by enhanced model resolution? By J. Wagner et al. in Atmospheric Chemistry and Physics Discussions.

Articles can be submitted to the joint "Chemistry-Climate Modelling Initiative (CCMI)" special issue, organized between Atmospheric Chemistry and Physics, Atmospheric Measurement Techniques, Earth System Science Data, and Geoscientific Model Development. Find more information here.

The U.S. National Academies of Sciences, Engineering, and Medicine released the report The Future of Atmospheric Chemistry Research: Remembering Yesterday, Understanding Today, Anticipating Tomorrow on Friday 26 August 2016.