Abstract submission deadline: 11 Jan 2017
Deadline for travel support requests: 1 Dec 2016

The EGU session on Dynamical coupling between the stratosphere and the troposphere (AS1.28) is interested in the dynamical two-way interaction between the stratosphere and the troposphere, the mechanisms for this interaction, and its consequences for explaining both short-term atmospheric weather and longer-term climate variability. This also includes work that investigates alternate diagnostics for the definition of major and minor stratospheric sudden warmings and work that focuses on the role of the stratosphere for the predictability of tropospheric forecast in medium-range to sub-seasonal time scale.

Session conveners: Thomas Reichler, Bo Christiansen and Seok-Woo Son.

Abstract submission is now open and closes on 11 January 2017.
Applications for travel support from early career scientists close on 1 December 2016.

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

Increase in the potential predictability of the Arctic Oscillation via intensified teleconnection with ENSO after the mid-1990s. By D. Kang and M.-I. Lee et al. in Climate Dynamics.

Dry layers in the tropical troposphere observed during CONTRAST and global behavior from GFS analyses. By W.J. Randel et al. in the Journal of Geophysical Research: Atmospheres.

On the role of tropopause folds in summertime tropospheric ozone over the eastern Mediterranean and the Middle East. By D. Akritidis et al. in Atmospheric Chemistry and Physics.

Seasonal variability of stratospheric methane: implications for constraining tropospheric methane budgets using total column observations. By K.M. Saad et al. in Atmospheric Chemistry and Physics.

On the discrepancies in tropical belt expansion between reanalyses and climate models and among tropical belt width metrics. By N. Davis and T. Birner in the Journal of Climate.

Early action on HFCs mitigates future atmospheric change. By M.M. Horowitz et al. in Environmental Research Letters.

Comparison of simulated and observed convective gravity waves. By S. Kalisch et al. in the Journal of Geophysical Research: Atmospheres.

STEFLUX, a tool for investigating stratospheric intrusions: application to two WMO/GAW global stations. By D. Putero et al. in Atmospheric Chemistry and Physics.

Impact of global warming on the rise of volcanic plumes and implications for future volcanic aerosol forcing. By T.J. Aubry et al. in the Journal of Geophysical Research: Atmospheres.

Transport of Chemical Tracers from the Boundary Layer to Stratosphere Associated with the Dynamics of the Asian Summer Monsoon. By L.L. Pan et al. in the Journal of Geophysical Research: Atmospheres.

Was breaking the taboo on research on climate engineering via albedo modification a moral hazard, or a moral imperative? By M.G. Lawrence and P.J. Crutzen in Earth’s Future.

Discussion papers – open for comment

Long-lived contrails and convective cirrus above the tropical tropopause. By U. Schumann et al. in Atmospheric Chemistry and Physics Discussions.

Residual Mean Circulation and Temperature Changes during the Evolution of Stratospheric Sudden Warming Revealed in MERRA. By B.-G. Song and H.Y. Chun in Atmospheric Chemistry and Physics Discussions.

Travel support is available for early career scientists that apply before 1 December 2016.

The EGU session on Past and future atmospheric temperature changes and their Drivers (AS1.25/CL4.14) aims to address the current scientific challenges that surround measuring, modelling, and attributing the drivers of atmospheric temperature changes within the troposphere, stratosphere, and mesosphere. Abstracts are welcomed that use observational datasets (e.g. from satellites, aircraft measurements, radiosondes) and numerical models to investigate global and regional atmospheric temperature changes over the past and future.

Session convenors: Amanda Maycock, Andrea Steiner, and Bill Randel.

Abstract submission is now open and closes on 11 January 2017. Applications for travel support from early career scientists close on 1 December 2016.

The VolRes initiative aims to prepare a research plan for the next major volcanic eruption.

The SSiRC activity has started a new initiative called VolRes "Volcano Response Plan after the next major eruption" to prepare a plan for the next major volcanic eruption. This plan aims to highlight the science questions behind the chemical and climate impacts of large volcanic eruptions to define measurement and modelling strategies which will augment our knowledge and can be used to forecast and mitigate their impacts on Earth’s climate. The plan should facilitate the coordination between observational and modelling groups throughout the world. The group have started to gather a diverse group of model and observational scientists who would be interested in participating and in putting together this paper. For further information please contact Jean-Paul Vernier or Claudia Timmreck.

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

Evidence for wave resonance as a key mechanism for generating high-amplitude quasi-stationary waves in boreal summer. By K. Kornhuber et al. in Climate Dynamics.

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.

Tropospheric ozone change from 1980 to 2010 dominated by equatorward redistribution of emissions. By Y. Zhang et al. in Nature Geoscience.

Stratospheric control of planetary waves. By P. Hitchcock and P.H. Haynes in Geophysical Research Letters.

A Strong Phase Reversal of the Arctic Oscillation in Midwinter 2015/16: Role of the Stratospheric Polar Vortex and Tropospheric Blocking. By H.H.N. Cheung et al. in the Journal of Geophysical Research: Atmospheres.

Barotropic decelerations of the southern stratospheric polar vortex. By C.A.F. Marques and Castanheira in the Quarterly Journal of the Royal Meteorological Society.

Remote control on NAO predictability via the stratosphere. By F. Hansen et al. in the Quarterly Journal of the Royal Meteorological Society.

Low frequency oscillations of the gravity wave energy density in the lower atmosphere at low latitudes revealed by US radiosonde data. By H.Y. Li et al. in the Journal of Geophysical Research: Atmospheres.

LALINET: The first Latin American-born regional atmospheric observational network. By J.C. Antunas-Marrero et al. in the Bulletin of the American Meteorological Society.

Regional and seasonal radiative forcing by perturbations to aerosol and ozone precursor emissions. By N. Bellouin et al. in Atmospheric Chemistry and Physics.

Connecting atmospheric blocking to European temperature extremes in spring. By L. Brunner et al. in the Journal of Climate.

Discussion papers – open for comment

Testing chemistry-climate models’ regulation of tropical lower-stratospheric water vapor. By K.M. Smalley et al. in Atmospheric Chemistry and Physics Discussions.

A New Differential Optical Absorption Spectroscopy Instrument to Study Atmospheric Chemistry from a High-Altitude Unmanned Aircraft. By J. Stutz 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).

What makes an annular mode “annular”? By E.P. Gerber and D.W.J. Thompson in the Journal of the Atmospheric Sciences.

Intercomparison and evaluation of satellite peroxyacetyl nitrate observations in the upper troposphere–lower stratosphere. By R.J. Pope et al. in Atmospheric Chemistry and Physics.

Vortex splitting on a planetary scale in the stratosphere by cyclogenesis on a sub planetary scale in the troposphere. By A. O’Neill et al. in the Quarterly Journal of the Royal Meteorological Society.

The effect of a well-resolved stratosphere on East Asian winter climate. By K. Wei et al. in Climate Dynamics.

Changes of the tropical tropopause layer under global warming. By P. Lin et al. in the Journal of Climate.

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.

Consistency between GRUAN sondes, LBLRTM and IASI. By X. Calbet et al. in Atmospheric Measurement Techniques Discussions.

Applications due 15 November

Monsoons are a global phenomenon, and the breadth of socio-economic areas in different regions is greatly influenced by its progress and consequences at regional and local scales. The Jeju National University (JNU) is launching a collaborative framework with the World Climate Research Programme (WCRP) on training and education for ocean and climate science, and organizes its first training school to share and promote contemporary issues in the area of monsoon study, particularly incorporating the interest of users (of information to understand and predict monsoon phenomena) of the Asia-Pacific region.

This school will focus on understanding tropical process and scale interactions therein (sub-daily, intraseasonal to interannual), for the Asia-Pacific region. It also aims to share knowledge and discuss scientific challenges for monsoon prediction particularly in intra-seasonal to seasonal scales. Participants will be requested to participate in open dialogues on the “user needs”, as well as the impacts of monsoon variability in changing climate to coastal zones.

The training school is targeted for young scientists and early-career forecasters in the relevant fields. It will take place from 16-21 January 2017.

Find more information and apply at: www.wcrp-climate.org/wcrp-jnu-overview

Congratualtions!

Meet the members of the SPARC Scientific Steering Group.

The Young Earth System Scientists (YESS) community describes its long-term vision and thoughts on the frontiers of Earth system science.

The YESS community has recently published a white paper ‘Earth System Science Frontiers – an ECS perspective‘ in the Bulletin of the American Meteorological Society (BAMS), currently available as an early online release.

In the paper, an active group of young Earth system scientists describe their long-term vision of the frontiers of Earth system science, paving the way towards an integrated understanding of the Earth system. The paper is an outcome of the World Meteorological Organization-funded Early Career Researchers Workshop at the Deutscher Wetterdienst in Offenbach, Germany, in October 2015 and focuses on four frontiers: seamless Earth system prediction, communication, user-driven science, and interdisciplinarity.

In the Science issue from 28 Oct 2016, Charles F. Kennel and colleagues discuss how the scientific community should become active in…

…crafting and implementing more effective policies in a system of highly decentralized global cooperation. With the 2015 Paris Agreement, governments launched a process that can move beyond setting agendas to coordinating national policies to manage the climate. Next month in Marrakesh, diplomats will convene to flesh out the Agreement. They need to focus on the infrastructure of data and analysis that will be needed as the Agreement becomes operational.

Find article.