CFC-11 Symposium 25-27 March 2019, Vienna, Austria

+++ NOTE: The Symposium will take place as scheduled for March 25-27.  No need to reschedule +++

Table of Contents:

General information
Information on Attendance and Registration
Organising & Scientific Programme Committee
Travel information (incl. list hotels)  (download PDF, 0.3MB)

(Registration has closed on Jan 15, 00:00h)

Download meeting announcement (PDF, 0.3 MB)

Meeting programme & Abstracts (password required)

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 14 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.

Symposium Venue:
Vienna International Centre
United Nations Office at Vienna Wagramerstrasse 5
1400 Vienna

If you are interested in attending, please email Ms. Susan McFadden (vog.a1555900995san@n1555900995eddaf1555900995cm.k.1555900995nasus1555900995),  and Symposium notifications will be emailed to you as registration and abstract submissions open.

Organizing Committee:

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)

Registration has closed on January 15 2019, 00:00h.

Travel information

(download PDF, 0.3MB)

1) Meeting Venue:

Vienna International Centre
United Nations Office at Vienna
Wagramerstrasse 5
1400 Vienna

2) List of Hotels:
A list of recommended hotels located near the meeting venue can be found at the following link:
Hotel list – Vienna

This is a list of 28 Hotels of various categories. The following four hotels are within 5-20 min walking distance of the venue:


Participants are responsible for making their own bookings for hotel accommodation directly with hotels and are advised to do so as soon as possible in order to take advantage of preferred accommodation and because of other events taking place in Vienna at the same time. Participants are advised to request the United Nations rate when making bookings in order to benefit from preferred rates.

3) Visa information:
Visa requirements to enter Austria vary greatly between nationalities and it is therefore essential to check visa requirements before travelling. Visas must be obtained prior to arrival in the country and it is the responsibility of each participant to obtain the required entry visa to Austria. Please note that a Schengen visa is required, even for transiting through Schengen-zone European countries. Further information can be found at the following link:

4) Health requirements and medical facilities:
Visitors to Austria are required to pay for health services. Participants travelling to Austria are therefore strongly advised to obtain medical insurance before leaving their home country. The Secretariat will not assume responsibility for health-care services for meeting participants in Austria.

No immunizations are required to enter Austria, although participants are advised to make sure that their tetanus, diphtheria and polio vaccinations are up to date before travelling.

First-aid and emergency services will be available at the venue throughout the meeting and a United Nations joint medical services clinic is located at the venue. The closest hospital to the venue is located at the following address:

Vienna General Hospital
(Allgemeines Krankenhaus)
Währinger Gürtel 18-20
1090 Wien
Tel: (+43 1) 40400-01964 or 3954

5) Local transportation and safety:

a) Local transportation
Participants are responsible for making their own arrangements for transportation to and from the airport and their hotels and the Vienna International Centre.

An airport bus service operates between the Vienna International Airport and Morzinplatz (U1/U4 metro station at Schwedenplatz) at a cost of 8 euros for a single journey, including luggage. Journey time is approximately 20 minutes. Buses leave the airport for Morzinplatz at 1.20 a.m. and 2.50 a.m., then every 30 minutes from 4.50 a.m. to 12.20 a.m. Buses leave Morzinplatz for the airport at 12.30 a.m. and 2 a.m., then every 30 minutes from 4 a.m. to 11.30 p.m.

There is also a bus service between the Vienna International Centre (next to the Kaisermühlen/Vienna International Centre station on the U1 metro line) and Vienna International Airport. The fare is 8 euros for a one-way ticket and 13 euros for a return ticket, and the travel time is approximately 20-45 minutes, depending on the time of day of travel. Buses leave the airport for the Vienna International Centre every hour from 7.10 a.m. to 8.10 p.m. and leave the conference centre for the airport every hour from 6.10 a.m. to 7.10 p.m.

The City Airport Train (CAT) transports passengers between the CAT terminal in Vienna (the Wien Mitte/Landstrasse station on U3 and U4 metro lines) and Vienna International Airport. The fare is 12 euros for a one-way ticket and 19 euros for a return ticket, and the travel time is approximately 16 minutes. Trains leave the airport for Wien Mitte/Landstrasse every 30 minutes from 6.06 a.m. to 11.36 p.m. and leave Wien Mitte/Landstrasse for the airport every 30 minutes from 5.36 a.m. to 11.06 p.m.

To access the Vienna International Centre from the city centre, take underground line U1 in the direction of Leopoldau until you reach Kaisermühlen/Vienna International Centre, then follow the signs to Gate 1 of the Vienna International Centre, the main entrance. The conference centre is also easy to reach by car via the A22 motorway or from the city centre via the Reichsbrücke.

b) Useful links

c) Safety
Although Vienna is a comparatively safe place and violent crime is rare, there are incidences of pickpocketing and minor theft. Participants are advised to pay particular attention at the airport, around the railway station and in busy areas of the city, and not to leave their luggage unattended at any time.

Emergency phone numbers are:
General emergency: 112
Fire: 122
Police: 133
Ambulance: 144

6) Local currency
The currency of Austria is the Euro. Bank Austria-Creditanstalt has branches on the first floor of the C-Building and on the entrance level of the D-Building of the conference centre, which provide full banking services. Opening hours are from 9.00 a.m. to 3.00 p.m. on Monday, Tuesday, Wednesday and Friday and from 9.00 a.m. to 5.30 p.m. on Thursday.

7) Official language
The official language of Austria is German, with most citizens speaking at least one other language. English is widely spoken.

8) Other practical information

a) Phone access codes
The country code for Austria is 43 and the area code for Vienna is 1.

b) Electrical power supply
The electric power in Vienna is 220-240 volts, running at 50Hz, and the primary socket types are Schuko and Europlug (see figure below). Delegates are strongly encouraged to carry their own electrical adapters for use with laptops and other electrical appliances, as the Secretariat will not be able to provide them.

c) SIM cards for cellular phones
Local SIM cards that can be used with unlocked phones are available from any post office or news stand. A valid passport is required for purchase.

d) Post office, telephones and faxes
A post office on the first floor of the C-Building of the Vienna International Centre (ext. 4986) provides all regular postal services, including a fax service, from 8 a.m. to 6 p.m. Monday to Friday.

e) Restaurants and cafes
The cafeteria is located on the ground floor of the F-Building. It is open on weekdays from 7.30 a.m. to 10 a.m. for breakfast and from 11.30 a.m. to 2.30 p.m. for lunch. The coffee corner in the cafeteria is open from 8.30 a.m. to 3.30 p.m.

The coffee areas in the M-Building and the C-Building (C07) are open from 9 a.m. to 4.30 p.m. Monday to Friday. The coffee corner near to the plenary hall will be open from 8.30 a.m. to 6.30 p.m. daily.

The coffee corner in the C-Building (C04) (offering a new sandwich concept and premium coffee) is open from 9 a.m. to 4 p.m.

The cocktail lounge/bar is located in the F-building. It is open from 11.30 a.m. to 8 p.m. Monday to Thursday and from 11.30 a.m. to 9 p.m. on Friday.

The à la carte fine dining restaurant is located in the F-building (entrance through the cocktail lounge/bar). It is open from 11.30 a.m. to 2.30 p.m. (reservations are strongly recommended; please send requests by email to *protected email* no later than 11.30 a.m. on the day that the booking is required).

Additional information, including the weekly cafeteria menu and the restaurant menu, can be found at the following link: