Table of Contents:
The Montreal Protocol was designed to protect the stratospheric ozone layer by reducing the abundances of ozone depleting substances (ODS) such as chlorofluorocarbons (CFCs) in the atmosphere. The measures taken were successful with the abundance of ODS peaking in the late 1990s and continuously decreasing since that time. However, in a recent letter to Nature, Montzka et al. (2018) reported an unexpected and persistent global emission increase of 13,000 tonnes of CFC-11, both a powerful ozone-depleting substance and a powerful greenhouse gas. This study combined decade-long time-series of CFC-11 from various continents with a suite of two- and three-dimensional model simulations. It concluded that emissions from eastern Asia had increased, although increases in other regions were not ruled out. It also suggested that the CFC-11 emission increase arises from new production that has not been reported to the Ozone Secretariat of the United Nations Environment Programme.
The purpose of the Symposium is to provide a forum for scientists and technologists to explore and present information on the potential causes of the increased CFC-11 emissions. This information will provide a firmer scientific basis for discussions amongst the Parties of the Montreal Protocol in the coming years. The Symposium is open to discussions on all aspects of CFC-11 and related compounds, from production to atmospheric loss, along with environmental impact of the molecule.
Topics include, but are not exclusive:
• Pathways by which CFC-11 is produced primarily, or inadvertently, along with feedstocks for that production (e.g., CCl4) and co-produced compounds (e.g., CFC-12).
• Feedstock usages of CFC-11
• Primary usages of CFC-11, both historical and current
• Emission sources for CFC-11 and related compounds, their magnitudes, and timescales for CFC-11 release.
• Analysis of compounds that can be used to trace atmospheric transport of CFC-11
• Bottom-up estimates of global and regional CFC-11 emissions
• Atmospheric observations, sampling techniques, and analysis of CFC-11 and related compounds (ground, aircraft, satellite)
• Top-down emission estimates of global and regional CFC-11 emissions
• Lifetime estimates of CFC-11 and CFC-11 loss processes
• Ozone depletion from the increased emissions to date, and projected for the future
• Other environmental impact of the increased emissions, including increases of UV and climate.
Attendance Application and Registration:
Registration and abstract submission will provisionally open on October 25, 2018 and close on January 2 2019. More details on the timing and procedure will be announced in the coming weeks. The Symposium is limited to 100 persons. Hence, attendance will be approved by the Scientific Steering Committee if applications are oversubscribed. Priorities on attendance will be based upon (a) whether an applicant has submitted an accepted abstract and (b) their technical and scientific interests and standing.
Limited travel funding will be available for attendance, again subject to priorities outlined above.
Vienna International Centre
United Nations Office at Vienna Wagramerstrasse 5
If you are interested in attending, please email Ms. Susan McFadden (firstname.lastname@example.org), and Symposium notifications will be emailed to you as registration and abstract submissions open.
Geir Braathen (WMO), Neil Harris (SPARC), Paul Newman (SAP), Bella Maranion (TEAP), Sophia Mylona (Ozone Secretariat)
Scientific Programme Committee:
Tina Birmpili (Ozone Secretariat), Geir Braathen (WMO), Neil Harris (SPARC), Jianxin Hu (Univ. Beijing), Ken Jucks (NASA), Paul Newman (SAP), Bella Maranion (TEAP), Steve Montzka (NOAA), Sophia Mylona (Ozone Secretariat), Sun Young Park (Korea), Stefan Reimann (Empa), Matt Rigby (Univ. Bristol), Takuya Saito (Japan), Helen Tope (TEAP)
To register for the workshop, please fill in the registration form below, and send your abstract and a photo for the security badge to gro.e1545183874tamil1545183874c-cra1545183874ps@ec1545183874iffo1545183874.
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