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

A Match-based approach to the estimation of polar stratospheric ozone loss using Aura Microwave Limb Sounder observations. By N.J. livesey et al. in Atmospheric Chemistry and Physics.

Estimate of carbonyl sulfide tropical oceanic surface fluxes using aura tropospheric emission spectrometer observations. By L. Kuai et al. in the Journal of Geophysical Research: Atmospheres.

A minor sudden stratospheric warming with a major impact: Transport and polar processing in the 2014/2015 Arctic winter. By G.L. Manney et al. in Geophysical Research Letters.

Can a coupled meteorology–chemistry model reproduce the historical trend in aerosol direct radiative effects over the Northern Hemisphere? By J. Xing et al. in Atmospheric Chemistry and Physics.

Past changes in the vertical distribution of ozone – Part 3: Analysis and interpretation of trends. By N.R.P. Harris et al. in Atmospheric Chemistry and Physics.

Ensemble data assimilation of total column ozone using a coupled meteorology–chemistry model and its impact on the structure of Typhoon Nabi (2005). By S. Lim et al. in Atmospheric Chemistry and Physics.

Atmospheric impact of Arctic sea ice loss in a coupled ocean-atmosphere simulation. By R.E. Petrie et al. in the Journal of Climate.

Linear trends and closures of 10-year observations of AIRS stratospheric channels. By F. Pan et al. in the Journal of Climate.

Discussion papers – open for comment

Global and zonal tropospheric ozone variations from 2003–2011 as seen by SCIAMACHY. By F. Ebojie et al. in Atmospheric Chemistry and Physics Discussions.

The latitudinal structure of recent changes in the boreal Brewer–Dobson circulation. By C. Shi et al. in Atmospheric Chemistry and Physics Discussions.

Abstract submission deadline: 2 October 2015
Registration deadline: 9 October 2015

We would like to announce a SPARC regional workshop on "Chemical and Physical Processes in the Climate System". The workshop will be held at NCAR in Boulder, CO from Nov 9-10 (directly followed by the SPARC SSG meeting on Nov 10-13).

The purpose of this workshop is to highlight SPARC-related science themes in the Colorado front-range region, and to promote interaction among a broad scale of local and international researchers. The local workshop will focus on 3 SPARC scientific themes:

1) Atmospheric Dynamics and Predictability

2) Chemistry and Climate

3) Long-term records for Climate Understanding

Abstracts are due on Oct. 2nd, and registration is due on Oct. 9th. Early career scientists are especially encouraged to participate.

The website is: https://www2.acom.ucar.edu/sparc.

Hope to see you there!

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

Stratospheric ozone in boreal fire plumes – the 2013 smoke season over central Europe. By T. Trickl et al. in Atmospheric Chemistry and Physics.

Trajectory mapping of middle atmospheric water vapor by a mini network of NDACC instruments. By M. Lainer et al. in Atmospheric Chemistry and Physics.

Is there a solar signal in lower stratospheric water vapour? By T. Schieferdecker et al. in Atmospheric Chemistry and Physics.

Dust aerosol feedback on the Indian summer monsoon: Sensitivity to absorption property. By S. Das et al. in the Journal of Geophysical Research: Atmospheres.

Bi-modal Distribution of Free Tropospheric Ozone over the Tropical Western Pacific Revealed by Airborne Observations. By L.L. Pan et al. in Geophysical Research Letters.

Consistent response of Indian summer monsoon to Middle East dust in observations and simulations. By Q. Jin et al. in Atmospheric Chemistry and Physics.

Capturing and sharing our collective expertise on climate data: the CHARMe project. By D. Clifford et al. in the Bulletin of the American Meteorology Society.

Stratospheric variability of wave activity and parameters in equatorial coastal and tropical sites during the West African monsoon. By P. Kafando et al. in Climate Dynamics.

Discussion papers – open for comment

Equatorial middle atmospheric chemical composition changes during sudden stratospheric warming events. By O. Nath and S. Sridharan in Atmospheric Chemistry and Physics Discussions.

Find the SPARC bulletin 9/2015 that is sent by email every two months.

Registration deadline extended to 16 September 2015

The CLIVAR Research Focus on Decadal Climate Variability and Predictability (DCVP) is organising a workshop on this theme at the International Centre for Theoretical Physics (ICTP) in Trieste, Italy on 16-20 November 2015. An outline agenda is available on the workshop website, based on the confirmed speakers so far.

The registration has been extended to 16th September there have been funds from the PAGES Project awarded recently to support the participation of scientists from the paleoscience community.

The agenda (oral and poster) will be updated later in September, once the submitted abstracts have been reviewed.

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

Assessing the Impacts of Assimilating IASI and MOPITT CO Retrievals Using CESM-CAM-chem and DART. By J. Barré et al. in the Journal of Geophysical Research: Atmospheres.

Understanding the contrasting North Atlantic Oscillation anomalies of the winters of 2010 and 2014. By G. Rivière and M. Drouard in Geophysical Research Letters.

Global validation of SCIAMACHY limb ozone data (versions 2.9 and 3.0, IUP Bremen) using ozonesonde measurements. By J. Jia et al. in Atmospheric Measurement Techniques.

Momentum Flux Estimates Accompanying Multi-Scale Gravity Waves over Mt. Cook, New Zealand on 13 July 2014 during the DEEPWAVE Campaign. By K. Bossert et al. in the Journal of Geophysical Research: Atmospheres.

Comparison of ozone retrievals from the Pandora spectrometer system and Dobson spectrophotometer in Boulder, Colorado. By J. Herman et al. in Atmospheric Measurement Techniques.

A case study of typhoon-induced gravity waves and the orographic impacts related to Typhoon Mindulle (2004) over Taiwan. By J.F. Wu et al. in the Journal of Geophysical Research: Atmospheres.

Climate extremes in multi-model simulations of stratospheric aerosol and marine cloud brightening climate engineering. By V.N. Aswathy et al. in Atmospheric Chemistry and Physics.

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

A Comparison of Temperature and Precipitation Responses to Different Earth Radiation Management Geoengineering Schemes. By J. Crook et al. in the Journal of Geophysical Research: Atmospheres.

On solar geoengineering and climate uncertainty. By D.G. MacMartin et al. in Geophysical Research Letters.

Study of the wind velocity layered structure in the stratosphere, mesosphere and lower thermosphere by using infrasound probing of the atmosphere. By I. Chunchuzov et al. in the Journal of Geophysical Research: Atmospheres.

Single interval shortwave radiation scheme with parameterized optical saturation and spectral overlaps. By J. Mašek et al. in the Quarterly Journal of the Royal Meteorological Society.

First observations, trends and emissions of HCFC-31 (CH₂ClF) in the global atmosphere. By F. Schoenenberger et al. in Geophysical Research Letters.

Transport of Antarctic stratospheric strongly dehydrated air into the troposphere observed during the HALO-ESMVal campaign 2012. By C. Rolf et al. in Atmospheric Chemistry and Physics.

What is the limit of climate engineering by stratospheric injection of SO₂? By U. Niemeier and C. Timmreck in Atmospheric Chemistry and Physics.

A method for merging nadir-sounding climate records, with an application to the global-mean stratospheric temperature data sets from SSU and AMSU. By C. McLandress et al. in Atmospheric Chemistry and Physics.

Dynamical, convective, and microphysical control on wintertime distributions of water vapor and clouds in the tropical tropopause layer. By R. Ueyama et al. in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment

Variability of water vapour in the Arctic stratosphere. By L. Thölix et al. in Atmospheric Chemistry and Physics Discussions.

Polar Stratospheric Cloud evolution and chlorine activation measured by CALIPSO and MLS, and modelled by ATLAS. By H. Nakajima et al. in Atmospheric Chemistry and Physics Discussions.

Upper tropospheric water vapour variability at high latitudes – Part 1: Influence of the annular modes. By C.E. Sioris et al. in Atmospheric Chemistry and Physics Discussions.

The fact sheet prepared by the SPARC Office on the "Impact of the changing climate on the ozone layer" is available in German and French.

Find more fact sheets.

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

Impact of the 2009 major sudden stratospheric warming on the composition of the stratosphere. By M. Tao et al. in Atmospheric Chemistry and Physics.

New calibration noise suppression techniques for the GLORIA limb imager. By T. Guggenmoser et al. in Atmospheric Measurement Techniques.

Global and seasonal variations in three-dimensional gravity wave momentum flux from satellite limb sounding temperatures. By M.J. Alexander in Geophysical Research Letters.

Rapid increases in tropospheric ozone production and export from China. By W.W. Verstraeten et al. in Nature Geoscience.

A comparison of chemical mechanisms using tagged ozone production potential (TOPP) analysis. By J. Coates and T.M. Butler in Atmospheric Chemistry and Physics.

New and improved infrared absorption cross sections for dichlorodifluoromethane (CFC-12). By J.J. Harrison in Atmospheric Measurement Techniques.

Tropospheric ozone and its precursors from the urban to the global scale from air quality to short-lived climate forcer. By P.S. Monks et al. in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

The tropopause inversion layer in baroclinic life cycles experiments: the role of diabatic and mixing processes. By D. Kunkel et al. in Atmospheric Chemistry and Physics Discussions.

Radiative and climate impacts of a large volcanic eruption during stratospheric sulfur geoengineering. By A. Laakso et al. in Atmospheric Chemistry and Physics Discussions.

The conference Global Climate Observation: the Road to the Future will be held from 2-4 March 2016 in Amsterdam, the Netherlands.

The conference provides an opportunity to shape the new GCOS implementation plan. The main goals of the meeting are to

• show how ECVs have helped shaping our understanding of climate
• discuss observations for adaptation, mitigation and disaster risk reduction
• identify critical gaps in the observing system
• identify future areas for the use and development of new technology.

The main outcome should be a list of priority and additional actions that can be included in a new GCOS Implementation plan. Guidance on how GCOS should align its work plan with other related climate policy activities (RAMSAR, CBD, etc) and work programmes is also expected.

Registration opens on 15 October 2015.

For further information find GCOS conference website.