Deadline for abstracts with travel requests: 15 July 2015
Deadline for regular abstracts: 31 July 2015

Dates:
7-9 October 2015

Venue:
ESRIN & CNR – Tor Vergata, Frascati/Rome, Italy

Theme:
Process-oriented evaluation and analysis of CCMI-1 simulations

Highlight:
The first day of the workshop will consist of a joint session with the AeroCom community to focus on the combined CCMI/AeroCom plan for CMIP6 (AerChemMIP).
More information is available on the official workshop website.

Scope:
The CCMI 2015 workshop will focus on process-oriented evaluation and analysis of the CCMI Phase 1 (CCMI-1) troposphere-stratosphere resolving chemistry-climate model simulations using new observations and diagnostics. Parts of the workshop will be devoted to discussing plans for CCMI contributions to TOAR (the Tropospheric Ozone Assessment Report, 2016), the next WMO/UNEP ozone (2018), and CMIP6 (2020). A general description of CCMI can be found at http://www.met.reading.ac.uk/ccmi/.

Workshop Format:
The meeting will include invited and contributed oral presentations, poster sessions, and breakout-groups focusing on relevant workshop topics. Confirmed invited speakers (so far) are: Owen Cooper (USA), Paul Newman (USA), Seok-Woo Son (South Korea), Meiyun Lin (USA), Pieternel Levelt (Netherlands), and Gunnar Myhre (Norway). Information on the joint session with AeroCom is available at http://aerocom.zmaw.de/Welcome.2404.0.html.

Registration and Abstract Submission:
Abstract submission is now available at http://ccmi-workshop.artov.isac.cnr.it/. Please submit an abstract soon, especially if you require a letter of invitation (for which you should contact ). Registration information will be available soon.

Travel support:
We have limited funds for travel support available, primarily for early career and non- OECD scientists. Please provide a CV on the abstract submission page (an abstract must be submitted by July 15).

Venue:
The joint session with AeroCom (7 October) will be held at ESRIN in Frascati, while the following days (8 and 9 October) the workshop continues at CNR Tor Vergata in Rome.

Deadlines:
Abstracts with travel requests: 15 July 2015
Regular abstracts: 31 July 2015
Registration: 1 September 2015 (opens 15 July)

Scientific Organizing Committee:
Michaela Hegglin (U Reading), Jean-François Lamarque (NCAR), Federico Fierli (CNR), Chiara Cagnazzo (CNR), William Collins (U Reading), Michael Schulz (NMI), and the CCMI Scientific Steering Committee.

Local Organizing Committee:
Federico Fierli (CNR), Chiara Cagnazzo (CNR), Francesco Cairo (CNR), Simon Pinnock (ESA), Claus Zehner (ESA)
Questions should be addressed to

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

Contribution of changes in atmospheric circulation patterns to extreme temperature trends. By D.E. Horton et al. in Nature.

Drivers of the recent tropical expansion in the Southern Hemisphere: Changing SSTs or ozone depletion? By D.W. Waugh et al. in the Journal of Climate.

A Chemistry-Climate Model Study of Past Changes in the Brewer-Dobson Circulation. By S. Oberländer-Hayn et al. in the Journal of Geophysical Research: Atmospheres.

Nonlinear response of modelled stratospheric ozone to changes in greenhouse gases and ozone depleting substances in the recent past. By S. Meul et al. in Atmospheric Chemistry and Physics.

The 11-year solar cycle in current reanalyses: a (non)linear attribution study of the middle atmosphere. By A. Kuchar et al. in Atmospheric Chemistry and Physics.

The impact of ozone depleting substances on the circulation, temperature and salinity of the Southern Ocean: An attribution study with CESM1(WACCM). By A. Solomon et al. in Geophysical Research Letters.

Submission deadline: 5 August 2015

Dear Colleagues,

We welcome your submissions to the 2015 AGU Fall Meeting session 8471 entitled "Methodologies and resulting uncertainties in long-term records of ozone and other atmospheric essential climate variables constructed from multiple data sources."

Please note that the submission deadline is Wednesday, August 5.

We look forward to your contribution.

Session URL: https://agu.confex.com/agu/fm15/preliminaryview.cgi/Session8471

Session Description:
We will discuss uncertainties in long-term ozone and climate data records introduced from merging more than one measurement source. Data sources are combined to improve spatial or temporal sampling, or to extend the record in time. Relative offsets and drifts between measurements used in the climate data record introduce uncertainties on top of the measurement error for each individual instrument. Furthermore, individual instrumental records might vary in sensitivity to aerosol interference, sampling regime, spatial resolution, etc. All of these issues can introduce additional errors currently not assessed in analyses of long-term trends from climate data records, thus complicating attempts to confidently quantify long-term changes. This session will discuss prospective approaches for estimating the uncertainties and drifts in atmospheric climate data records constructed from multiple sources.

Primary Convener:
Irina V Petropavlovskikh, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States

Conveners:
Thierry Leblanc, California Institute of Technology, Pasadena, CA, United States, Karen Hepler Rosenlof, NOAA ESRL CSD, Boulder, CO, United States and Dale F Hurst, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States

Sincerely,
Irina, Thierry, Karen and Dale

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

Unusual stratospheric ozone anomalies observed in 22 years of measurements from Lauder, New Zealand. By G. E. Nedoluha et al. in Atmospheric Chemistry and Physics.

Evaluating the advective Brewer-Dobson circulation in three reanalyses for the period 1979–2012. By M. Abalos et al. in the Journal of Geophysical Research: Atmospheres.

The role of convective overshooting clouds in tropical stratosphere–troposphere dynamical coupling. By K. Kodera et al. in Atmospheric Chemistry and Physics.

Lagrangian analysis of microphysical and chemical processes in the Antarctic stratosphere: a case study. By L. Di Liberto et al. in Atmospheric Chemistry and Physics.

Momentum forcing of the quasi-biennial oscillation by equatorial waves in recent reanalyses. By Y.-H. Kim and H.-Y. Chun in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

Ozonesonde profiles from the West Pacific Warm Pool. By R. Newton et al. in Atmospheric Chemistry and Physics Discussions.

Trend analysis of the 20 years time series of stratospheric ozone profiles observed by the GROMOS microwave radiometer at Bern. By L. Moreira 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).

The impact of overshooting deep convection on local transport and mixing in the tropical upper troposphere/lower stratosphere (UTLS). By W. Frey et al. in Atmospheric Chemistry and Physics.

An evaluation of ozone dry deposition in global scale chemistry climate models. By C. Hardacre et al. in Atmospheric Chemistry and Physics.

Processes controlling tropical tropopause temperature and stratospheric water vapor in climate models. By S.C. Hardiman et al. in the Journal of Climate.

Impacts of 20^th century aerosol emissions on the South Asian monsoon in the CMIP5 models. By L. Guo et al. in Atmospheric Chemistry and Physics.

Subtropical and mid-latitude ozone trends in the stratosphere: implications for recovery. By P.J. Nair et al. in the Journal of Geophysical Research: Atmospheres.

Find instructions of how to obtain access to the data on the CCMI website.

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

Tug of war on summertime circulation between radiative forcing and sea surface warming. By T.A. Shaw and A. Voigt in Nature Geoscience.

Climate Symposium 2014 – Findings and Recommendations. By G. Asrar et al. in the Bulletin of the American Meteorological Society.

Evaluation of updated nitric acid chemistry on ozone precursors and radiative effects. By K.M. Seltzer et al. in Atmospheric Chemistry and Physics.

Interannual variability of the Madden-Julian Oscillation and its impact on the North Atlantic Oscillation in the boreal winter. By H. Lin et al. in Geophysical Research Letters.

Black Carbon Aerosols Induced Northern Hemisphere Tropical Expansion. By M. Kovilakam and S. Mahajan in Geophysical Research Letters.

The role of blocking in the summer 2014 collapse of Etesians over the eastern Mediterranean. By E. Tyrlis et al. in the Journal of Geophysical Research: Atmospheres.

Gravity wave propagation through a vertically and horizontally inhomogeneous background wind. By C.J. Heale and J.B. Snively in the Journal of Geophysical Research: Atmospheres.

The effect of ozone depletion on the Southern Annular Mode and stratosphere-troposphere coupling. By F. Dennison et al. in the Journal of Geophysical Research: Atmospheres.

Stratospheric sulfate aerosol injections cannot preserve the West Antarctic Ice Sheet. By K.E. McCusker et al. in Geophysical Research Letters.

Discussion Papers – Open for comment

Transport pathways of peroxyacetyl nitrate in the upper troposphere and lower stratosphere from different monsoon systems during the summer monsoon season. By S. Fadnavis 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).

Quantifying the role of internal climate variability in future climate trends. By D.W.J Thompson et al. in the Journal of Climate.

Quantifying contributions to the recent temperature variability in the tropical tropopause layer. By W. Wang et al. in Atmospheric Chemistry and Physics.

Wind extraction potential from ensemble Kalman filter assimilation of stratospheric ozone using a global shallow water model. By D.R. Allen et al. in Atmospheric Chemistry and Physics.

Polar-lower latitude linkages and their role in weather and climate prediction. By T. Jung et al. in the Bulletin of the American Meteorological Society.

Drivers of the tropospheric ozone budget throughout the 21st century under the medium-high climate scenario RCP 6.0. By L.E. Revell et al. in Atmospheric Chemistry and Physics.

Discussion Papers – Open for comment

Oceanic bromine emissions weighted by their ozone depletion potential. By S. Tegtmeier et al. in Atmospheric Chemistry and Physics Discussions.

Reassessment of MIPAS age of air trends and variability. By F.J. Haenel et al. in Atmospheric Chemistry and Physics Discussions.

Global HCFC-22 measurements with MIPAS: retrieval, validation, climatologies and trends. By M. Chirkov 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).

Data assimilation in atmospheric chemistry models: current status and future prospects for coupled chemistry meteorology models. By M. Bocquet et al. in Atmospheric Chemistry and Physics.

Stratospheric influence on tropospheric jet streams, storm tracks, and surface weather. By J. Kidston et al. in Nature Geoscience.

Polar processing in a split vortex: Arctic ozone loss in early winter 2012/2013. By G.L. Manney et al. in Atmospheric Chemistry and Physics.

Big grains go far: understanding the discrepancy between tephrochronology and satellite infrared measurements of volcanic ash. By J.A. Stevenson et al. in Atmospheric Measurement Techniques.

Sensitivity of Tropical Tropospheric Composition to Lightning NO_x Production as Determined by the NASA GEOS-Replay Model. By C.E. Liaskos et al. in the Journal of Geophysical Research: Atmospheres.

Aircraft measurements of BrO, IO, glyoxal, NO₂, H₂O, O₂–O₂ and aerosol extinction profiles in the tropics: comparison with aircraft-/ship-based in situ and lidar measurements. By R. Volkamer et al. in Atmospheric Measurement Techniques.

Round-robin evaluation of nadir ozone profile retrievals: methodology and application to MetOp-A GOME-2. By A. Keppens et al. in Atmospheric Measurement Techniques.

The Melting Arctic and Mid-latitude Weather Patterns: Are They Connected? By J. Overland et al. in the Journal of Climate.

TTL cooling and drying during the January 2013 Stratospheric Sudden Warming. By S. Evan et al. in the Quarterly Journal of the Royal Meteorological Society.

Evaluation of a regional air quality model using satellite column NO₂: treatment of observation errors and model boundary conditions and emissions. By R.J. Pope et al. in Atmospheric Chemistry and Physics.

A hiatus in the stratosphere? By A.J. Ferraro et al. in Nature Climate Change.

Quasi-biennial oscillation of the tropical stratospheric aerosol layer. By R. Hommel et al. in Atmospheric Chemistry and Physics.

Discussion Papers – Open for comment

The impact of volcanic aerosols on stratospheric ozone and the Northern Hemisphere polar vortex: separating radiative from chemical effects under different climate conditions. By S. Muthers 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).

Interhemispheric transit-time distributions and path-dependent lifetimes constrained by measurements of SF₆, CFCs, and CFC replacements. By M. Holzer and D.W. Waugh in Geophysical Research Letters.

Revising the slant-column density retrieval of nitrogen dioxide observed by the Ozone Monitoring Instrument. By S. Marchenko et al. in the Journal of Geophysical Research: Atmospheres.

Effect of Recent Sea Surface Temperature Trends on the Arctic Stratospheric Vortex. By C.I. Garfinkel et al. in the Journal of Geophysical Research: Atmospheres.

Growth in stratospheric chlorine from short-lived chemicals not controlled by the Montreal Protocol. By R. Hossaini et al. in Geophysical Research Letters.

Characterization of thermal structure and conditions for overshooting of tropical and extratropical cyclones with GPS radio occultation. By R. Biondi et al. in Atmospheric Chemistry and Physics.

Impact of stratospheric major warmings and the quasi-biennial oscillation on the variability of stratospheric water vapor. By M. Tao et al in the Journal of Geophysical Research: Atmospheres.

Data assimilation of satellite-retrieved ozone, carbon monoxide and nitrogen dioxide with ECMWF’s Composition-IFS. By A. Inness et al. in Atmospheric Chemistry and Physics.

The onset of the barotropic sudden warming in a global model. By Y.S. Liu and R.K. Scott in the Quarterly Journal of the Royal Meteorological Society.

Measuring and modeling the lifetime of Nitrous Oxide including its variability. By M.J. Prather et al. in the Journal of Geophysical Research: Atmospheres.