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

Changes to the chemical state of the Northern Hemisphere atmosphere during the second half of the twentieth century. By M.J. Newland et al. in Atmospheric Chemistry and Physics.

Evaluation of ACCMIP ozone simulations and ozonesonde sampling biases using a satellite-based multi-constituent chemical reanalysis. By K. Miyazaki and K. Bowman in Atmospheric Chemistry and Physics.

Impacts of meteoric sulfur in the Earth’s atmosphere. By J.C. Gomez Martin et al. in the Journal of Geophysical Research: Atmospheres.

Validation of 10-year SAO OMI Ozone Profile (PROFOZ) product using ozonesonde observations. By G. Huang et al. in Atmospheric Measurement Techniques.

The influence of extratropical cloud phase and amount feedbacks on climate sensitivity. By W.R. Frey and J.E. Kay in Climate Dynamics.

Exploring gravity wave characteristics in 3-D using a novel S-transform technique: AIRS/Aqua measurements over the Southern Andes and Drake Passage. By C.J. Wright et al. in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

BrO and Bry profiles over the Western Pacific: Relevance of Inorganic Bromine Sources and a Bry Minimum in the Aged Tropical Tropopause Layer. By T.K. Koenig et al. in Atmospheric Chemistry and Physics Discussions.

Chemistry-climate model simulations of the Mt. Pinatubo eruption using CCMI and CMIP6 stratospheric aerosol data. By L. Revell et al. in Atmospheric Chemistry and Physics Discussions.

Tropospheric ozone and its precursors at Summit, Greenland: comparison between observations and model simulations. By Y. Huang et al. in Atmospheric Chemistry and Physics Discussions.

Atmospheric QBO and ENSO indices with high vertical resolution from GNSS radio occultation temperature measurements. By H. Wilhelmsen et al. in Atmospheric Measurement Techniques Discussions.

Application deadline: 31 August 2017

The third Sino-European School on Atmospheric Chemistry (SESAC3) will scientifically address atmospheric chemistry basics in the 21st century as well as important current questions such as the routes for organics oxidation in the atmosphere, secondary organic aerosol formation and properties, dust physical chemistry, exchanges at interfaces (soil, oceans, etc.) and the implications to the atmosphere (air quality and climate change).

Invited Lecturers:

A.R. Ravishankara, Sergey Nizkorodov, Jamie Donaldson, Daniel Knopf, Markus Ammann , Wahid Mellouki, Christian George, Eric Villenave, Hartmut Herrmann, Bernard Aumont, Stephan Borrmann, Ali Wiedensohler , Thorsten Hoffmann , Guibin Jiang, Jiming Hao, Yuanhang Zhang, Jianmin Chen, Xin Yang, Yujing Mu, Xinming Wang, Tong Zhu, and Tao Wang.

How to apply:

Applications must include your CV, research interest and description of your work (Maximum length 3 pages) and should be sent by email to sesac3@sciencesconf.org before August 31st, 2017.

As the number of participant will be strictly limited, a selection of applications will made based on the quality of the documents submitted.

Costs:

The full registration fee for the school will be in the range 300 – 400 € (maximum amount requested depending on the final secured funding for the school and depending the type of accommodation selected – shared or single), covering all local costs (full board accommodation for the full duration of the school).

Attendees will have to cover themselves the travel expenses to Shanghai (if booked well in advance, this is associated with a reasonable cost).

More information can be found on the school website: https://sesac3.sciencesconf.org

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

Contribution of different processes to changes in tropical lower-stratospheric water vapor in chemistry–climate models. By K.M. Smalley et al. in Atmospheric Chemistry and Physics.

Effect of volcanic aerosol on stratospheric NO2 and N₂O₅ from 2002–2014 as measured by Odin-OSIRIS and Envisat-MIPAS. By C. Adams et al. in Atmospheric Chemistry and Physics.

Intercomparison of meteorological analyses and trajectories in the Antarctic lower stratosphere with Concordiasi superpressure balloon observations. By L. Hoffmann et al. in Atmospheric Chemistry and Physics.

Long-term change in the source contribution to surface ozone over Japan. By T. Nagashima et al. in Atmospheric Chemistry and Physics.

Ozone depletion following future volcanic eruptions. By J.E. Klobas et al. in Geophysical Research Letters.

Discussion papers – open for comment

Delayed Recovery of mid-latitude lower stratospheric Halogen Loading. By A. Engel et al. in Atmospheric Chemistry and Physics Discussions.

Ozone sensitivity to varying greenhouse gases and ozone-depleting substances in CCMI simulations. By O. Morgenstern et al. in Atmospheric Chemistry and Physics Discussions.

Merged SAGE II, Ozone_cci and OMPS ozone profiles dataset and evaluation of ozone trends in the stratosphere. By V.F. Sofieva et al. in Atmospheric Chemistry and Physics Discussions.

Ozone Impacts of Gas-Aerosol Uptake in Global Chemistry Transport Models. By S. Stadtler et al. in Atmospheric Chemistry and Physics Discussions.

MLS measurements of stratospheric hydrogen cyanide during the 2015–16 El Niño event. By H.C. Pumphrey et al. in Atmospheric Chemistry and Physics Discussions.

On the compatibility of Brewer total column ozone measurements in two adjacent valleys (Arosa and Davos) in the Swiss Alps. By R. Stübi et al. in Atmospheric Measurement Techniques Discussions.

Climate Impact of Polar Mesospheric and Stratospheric Ozone Losses due to Energetic Particle Precipitation. By K. Meraner and H. Schmidt 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).

Effects of mixing on resolved and unresolved scales on stratospheric age of air. By S. Dietmüller et al. in Atmospheric Chemistry and Physics.

New AIM/CIPS Global Observations of Gravity Waves near 50-55 km. By C.E. Randall et al. in Geophysical Research Letters.

Sensitivity of Sudden Stratospheric Warmings to Previous Stratospheric Conditions. By A. de la Camara et al. in the Journal of the Atmospheric Sciences.

Improved consistency of climate projections over Europe after accounting for atmospheric circulation variability. By C. Saffioti et al. in the Journal of Climate.

Observations and fine-scale model simulations of gravity waves over Davis, East Antarctica (69S, 78E). By S.P. Alexander et al. in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment

Multi-model Impacts of Climate Change on Pollution Transport from Global Emission Source Regions. By R.M. Doherty et al. in Atmospheric Chemistry and Physics Discussions.

Nonlinear response of tropical lower stratospheric temperature and water vapor to ENSO. By C.I. Garfinkel et al. in Atmospheric Chemistry and Physics Discussions.

Space-Time Variability of UTLS Chemical Distribution in the Asian Summer Monsoon Viewed by Limb and Nadir Satellite Sensors. By J. Luo et al. in Atmospheric Chemistry and Physics Discussions.

Dynamics and composition of the Asian summer monsoon anticyclone. By K.-D. Gottschaldt 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).

Efficient transport of tropospheric aerosol into the stratosphere via the Asian summer monsoon anticyclone. By P. Yu et al. in the Proceedings of the National Academy of Sciences of the United States of America.

On the Similarity of Lower-Stratospheric Potential Vorticity Dipoles above Tropical and Midlatitude Deep Convection. By M.H. Hitchman and S.M. Rowe in the Journal of the Atmospheric Sciences.

Influence of Stratospheric Air Masses on Radiotracers and Ozone over the Central Mediterranean. By E. Brattich et al. in the Journal of Geophysical Research: Atmospheres.

Hemispheric differences in the annual cycle of tropical lower stratosphere transport and tracers. By O.V. Tweedy et al. in the Journal of Geophysical Research: Atmospheres.

Causes of differences in model and satellite tropospheric warming rates. By B.D. Santer et al. in Nature Geoscience.

Impact of the Montreal Protocol on Antarctic Surface Mass Balance and Implications for Global Sea-Level Rise. By M. Previdi and L.M. Polvani in the Journal of Climate.

On the relative importance of radiative and dynamical heating for tropical tropopause temperatures. By T. Birner and E. Charlesworth in the Journal of Geophysical Research: Atmospheres.

An evaluation of gravity waves and gravity wave sources in the Southern Hemisphere in a 7-km global climate simulation. By L.A. Holt et al. in the Quarterly Journal of the Royal Meteorological Society.

Sensitivity of gravity wave fluxes to interannual variations in tropical convection and zonal wind. By M.J. Alexander et al. in the Journal of Atmospheric Sciences.

Discussion papers – open for comment

MIPAS observations of volcanic sulphate aerosol and sulphur dioxide in the stratosphere. By A. Günther et al. in Atmospheric Chemistry and Physics Discussions.

Volcanic stratospheric sulphur injections and aerosol optical depth from 500 BCE to 1900 CE. By M. Toohey and M. Sigl in Earth System Science Data Discussions.

Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors. By N.J. Ryan et al. in Atmospheric Chemistry and Physics Discussions.

Long-range isentropic transport of stratospheric aerosols over Southern Hemisphere following the Calbuco eruption in April 2015. By N. Bègue et al. in Atmospheric Chemistry and Physics Discussions.

NOy production, ozone loss and changes in net radiative heating due to energetic particle precipitation in 2002–2010. By M. Sinnhuber et al. in Atmospheric Chemistry and Physics Discussions.

9-14 October, Kyoto, Japan

Important dates:

Registration deadline:7 July 2017

Abstract Decision: 14 July 2017

The objective of the joint SPARC Dynamics & Observations Workshop is to gather researchers to better understand the processes and patterns coupling the tropical troposphere, stratosphere and beyond.

Focus will be on the interplay between large-scale phenomena such as the Madden Julian Oscillation, monsoons, tropical cyclones and the Quasi-Biennial Oscillation, their association with moist convection and its large-scale organisation, as well as their representation within simple and complex models.

The main activities of the joint meeting will include:

• Reporting results from the joint model experiments and analyses that were planned at the 2015 & 2016 SPARC QBOi workshops;
• Exploring opportunities for improved awareness, dissemination and exploitation of existing networks of high resolution radiosonde data; and
• Further the science of stratosphere-troposphere coupling within the tropics.

The Workshop will be held from 9-14 October 2017 in the Maskawa Building for Education and Research at Kyoto University.

The Workshop is an joint between the SPARC QBOi (Quasi-Biennial Oscillation Initiative), FISAPS (Fine Scale Atmospheric Processes and Structures), and SATIO-TCS (Stratospheric And Tropospheric Influences On Tropical Convective Systems) activities.

Organizers:
James Anstey, Neal Butchart, Marv Geller, Kevin Hamilton, Scott Osprey, Shigeo Yoden

Please prepare your abstract and register it on the registration page.

Find second circular.

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.