Find the SPARC eNews – January 2017 issue.

Subscribe to the SPARC eNews sent to you every two months.

Submit a nomination for a SSC member by 31 March 2017.

Find online form on the IGAC website.

Find the January 2017 issue of the SPARC Newsletter at:

http://www.aparc-climate.org/publications/newsletter/

Note that this issue is the last SPARC Newsletter available both in hardcopy and digital. If you only receive the hardcopy version of the newsletter please make sure to change your subscription, thanks.

Organised by the Antarctic Gravity Wave Instrument Network-ANGWIN, the special issue welcomes papers that deal with the theory, modelling and observations of gravity wave activity in the Arctic and Antarctic regions, at any altitude in the Earth’s atmosphere or ionosphere. Submissions are open until 28 April 2017.

If you have any questions please contact Dr Tracy Moffat-Griffin.

Submissions can be made using the link below or searching in the special issue sections on each journals website:

http://agupubs.onlinelibrary.wiley.com/agu/issue/10.1002/(ISSN)2169-8996.ANGWIN1/.

Abstract submission deadline: 15 Mar 2017
Travel grant application deadline: 15 Feb 2017

The fifth Chemistry-Climate Model Initiative (CCMI) Science Workshop will be held in Toulouse at Centre International de Conférences of Météo-France, 13-15 June 2017.

The main focus of the workshop will be on the most recent analyses of CCMI phase-1 simulations, which are centered on understanding trends and interannual variability of tropospheric and stratospheric composition over the past and into the future, and how the composition interacts with changes in the physical climate. Specific topics of the workshop include:

• Identifying natural and anthropogenic drivers of past and future composition changes and their implications for climate, air quality, and the ozone layer;
• Evaluating model ability to simulate past and predict future composition changes;
• Augmenting the use of ground-based, balloon, aircraft and satellite observations for process-oriented model evaluation;
• Investigating novel ways to use observations and models to constrain Earth-system processes;
• Analyzing stratosphere-troposphere coupling, also its impact on the ocean;
• Understanding the causes of inter-model differences;
• Linking model performance to future projections.

Find more information and register at http://www.meteo.fr/cic/meetings/2017/CCMI/index.html.

The emerging IGAC Activity CATCH (The Cryosphere and Atmosphere Chemistry) is shaping its strategy.

Provide your input at the dedicated Google Form.

Submissions to this joint ACP/AMT/ESSD/GMD special CCMI-issue are now being accepted.

Submit article.

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

Atmospheric seasonal forecasts of the 20^th Century: multi-decadal variability in predictive skill of the winter North Atlantic Oscillation (NAO) and their potential value for extreme event attribution. By A. Weisheimer et al. in the Quarterly Journal of the Royal Meteorological Society.

Monsoon circulations and tropical heterogeneous chlorine chemistry in the stratosphere. By S. Solomon et al. in Geophysical Research Letters.

The Influence of Ozone Forcing on Blocking in the Southern Hemisphere. By F. Dennison et al. in the Journal of Geophysical Research: Atmospheres.

Long-range transport pathways of tropospheric source gases originating in Asia into the northern lower stratosphere during the Asian monsoon season 2012. By B. Vögel et al. in Atmospheric Chemistry and Physics.

Harmonisation and diagnostics of MIPAS ESA CH₄ and N₂O profiles using data assimilation. By Q. Errera et al. in Atmospheric Measurement Techniques.

Impact of interactive chemistry of stratospheric ozone on southern hemisphere paleoclimate simulation. By S. Noda et al. in the Journal of Geophysical Research: Atmospheres.

The major stratospheric final warming in 2016: dispersal of vortex air and termination of Arctic chemical ozone loss. By G.L. Manney and Z.D. Lawrence in Atmospheric Chemistry and Physics.

Heterogeneous reaction of ClONO₂ with TiO₂ and SiO₂ aerosol particles: implications for stratospheric particle injection for climate engineering. By M. Tang et al. in Atmospheric Chemistry and Physics.

Reduced Southern Hemispheric circulation response to quadrupled CO₂ due to stratospheric ozone feedback. By G. Chiodo and L.M. Polvani in Geophysical Research Letters.

Global atmospheric teleconnections during Dansgaard–Oeschger events. By B.R. Markle et al. in Nature Geoscience.

Stratospheric solar geoengineering without ozone loss. By D.W. Keith et al. in Proceedings of the National Academy of Sciences of the United States of America.

Initialization shock in decadal hindcasts due to errors in wind stress over the tropical Pacific. By H. Pohlmann et al. in Climate Dynamics.

Poleward eddy heat flux anomalies associated with recent Arctic sea-ice loss. By K. Hoshi et al. in Geophysical Research Letters.

A connection from Arctic stratospheric ozone to El Niño-Southern oscillation. By F. Xie et al. in Environmental Research Letters.

Multidecadal variations of the effects of the Quasi-Biennial Oscillation on the climate system. By S. Brönnimann et al. in Atmospheric Chemistry and Physics.

Directional gravity wave momentum fluxes in the stratosphere derived from high resolution AIRS temperature data. By M. Ern et al. in Geophysical Research Letters.

An upper-branch Brewer–Dobson circulation index for attribution of stratospheric variability and improved ozone and temperature trend analysis. By W.T. Ball et al. in Atmospheric Chemistry and Physics.

Stratospheric variability contributed to and sustained the recent hiatus in Eurasian winter warming. By C.I. Garfinkel et al. in Geophysical Research Letters.

Discussion papers – open for comment

HEPPA-II model-measurement intercomparison project: EPP indirect effects during the dynamically perturbed NH winter 2008–2009. By B. Funke et al. in Atmospheric Chemistry and Physics Discussions.

Widespread persistent polar stratospheric ice clouds in the Arctic. By C. Voigt et al. in Atmospheric Chemistry and Physics Discussions.

Changing trends and emissions of hydrochlorofluorocarbons and their hydrofluorocarbon replacements. By P.G. Simmonds et al. in Atmospheric Chemistry and Physics Discussions.

The 9th International Atmospheric Limb Workshop will be hosted by the Atmospheric Remote Sensing Group from the University of Saskatchewan at the Sheraton Cavalier hotel in downtown Saskatoon.

Over the course of the three day meeting, oral and poster sessions will cover many aspects of both measurements techniques and scientific applications of atmospheric limb sounding. Presentations will be dedicated to past, current and future limb missions, sub-orbital instrumentation, and scientific studies of processes and trends in the stratosphere, mesosphere, and the UTLS. We will also hear from representatives of several space agencies and international programmes.

Abstract submission deadline: 15 March 2017

Early-bird registration deadline: 12 May 2017

Find more information and register at: http://limb2017.usask.ca

Registration and abstract submission deadline: 15 March 2017

The 3^rd ACAM Workshop, to be held at Jinan University, Guangzhou, China, 5-9 June 2017, is now accepting registrations and abstract submissions.

Applications are also being accepted for the 2^nd ACAM Training School, which takes place immediately following the workshop.

Please go to the meeting website for instructions:
https://www2.acom.ucar.edu/acam/guangzhou-2017

It is important to follow the instructions carefully as you go through the process.

Specific instructions are given for:

• Workshop registration
• Abstract submission (registration required)
• Training school application (open to early career scientists; workshop attendance is required)
• Travel support application

Special note for travel support:

• Please do not apply for travel support unless it is absolutely necessary for you to attend the workshop.
• Preference for travel support will be given to
  • Applicants from emerging scientific communities to promote capacity building
  • Applicants who are making significant contribution to ACAM science and working group activities as verified by the working group leaders.

We look forward to building on the success of the first two workshops and having strong participation in this important scientific and community building event.