A135
Understanding the unexpected increase in CFC-11 emissions

Session ID#: 78200

Session Description:
The Montreal Protocol (MP) protected the stratospheric ozone layer by reducing the atmospheric abundance of ozone depleting substances (ODS) such as chlorofluorocarbons (CFCs). It resulted in the ODS abundances peaking in the late 1990s, and steady decline since then. In 2018 an unexpected and persistent global emission increase of 13,000 tonnes of CFC-11 was reported for the 2014-2016 period; emissions from eastern Asia had increased, although increases in other regions were not ruled out. The CFC-11 emission increase seemed to arise from new production that had not been reported to the Ozone Secretariat of the United Nations Environment Programme under the MP’s requirements.

This session provides a forum to present information on all aspects of these increased CFC-11 emissions, including other associated ODSs and ozone impacts. This information will provide a firmer scientific basis for discussions amongst the MP members and for future focussed assessments.

Co-Sponsor(s):
  • WCRP: World Climate Research Programme -
Index Terms:

0322 Constituent sources and sinks [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0340 Middle atmosphere: composition and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
6699 General or miscellaneous [PUBLIC ISSUES]

Primary Convener:  Neil Richard Peter Harris, Cranfield University, Cranfield, MK43, United Kingdom
Conveners:  Sunyoung Park, Kyungpook National University, Daegu, South Korea and Paul A. Newman, NASA GSFC, Code 610, Greenbelt, MD, United States
Primary Liaison:  Neil Richard Peter Harris, Cranfield University, Cranfield, MK43, United Kingdom
 
Aircraft Observations of High Concentrations of CFC-11 and CFC-12 over Hebei Province, China in Spring 2016 (489301)
Sarah Elizabeth Benish, University of Maryland College Park, College Park, MD, United States, Ross J Salawitch, University of Maryland, College Park, MD, United States, Xinrong Ren, NOAA Science Center, College Park, MD, United States, Hao He, University of Maryland College Park, Department of Atmospheric and Oceanic Science, College Park, MD, United States and Russell R. Dickerson, University of Maryland College Park, College Park, United States
 
Revising the Ozone Depletion Potentials Metric for Short-Lived Chemicals such as CF3I and CH3I (499739)
Jun Zhang, University of Illinois at Urbana Champaign, Urbana, IL, United States, Donald J Wuebbles, University of Illinois at Urbana Champaign, Department of Atmospheric Sciences, Urbana, IL, United States, Douglas Edward Kinnison, NCAR, Boulder, CO, United States and Alfonso Saiz-Lopez, Spanish National Research Council, Zaragoza, Spain
 
Modelling the Potential Impacts on Total Column Ozone Recovery of the Recent, Unexpected Increases in CFC-11 emissions (505349)
John Adrian Pyle1, James M Keeble2, Alexander T Archibald2, Martyn Chipperfield3, N. Luke Abraham1, Sandip Dhomse4 and Paul T Griffiths5, (1)University of Cambridge, Chemistry, Cambridge, United Kingdom, (2)University of Cambridge, Cambridge, United Kingdom, (3)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (4)University of Leeds, Leeds, LS2, United Kingdom, (5)Chemistry Dept, Cambridge, United Kingdom
 
Near-global CFC-11 Trends as Observed by Atmospheric Infrared Sounder from 2002 to 2018 (510727)
Xiuhong Chen, University of Michigan Ann Arbor, Ann Arbor, MI, United States and Xianglei Huang, Univ of Michigan, Ann Arbor, MI, United States
 
A Method for Calculating Offsets to Ozone Depletion and Climate Impacts of Illegal ODS Production (523819)
Gabrielle B Dreyfus1, Stephen A Montzka2, Stephen O. Andersen1 and Richard Ferris1, (1)Institute for Governance & Sustainable Development, Washington, DC, United States, (2)NOAA/ESRL Global Monitoring Division, Boulder, CO, United States
 
Long-term observations of CFC-11, CFC-12, HCFC-22, HCFC-142b, and HFC-23 from ground-based FTIR at Rikubetsu and Tsukuba in Japan, and Syowa Station, Antarctica since 1995 (530160)
Hideaki Nakajima1, Masanori Takeda2, Isao Murata2, Tomoo Nagahama3 and Isamu Morino4, (1)NIES National Institute of Environmental Studies, Ibaraki, Japan, (2)Tohoku University, Graduate School of Environmental Studies, Sendai, Japan, (3)Nagoya Univ, Nagoya, Japan, (4)Nat.Inst. for Environ. Studies, Tsukuba, Japan
 
Increased CFC-11 Emissions from China: Recent Developments and the Search for Source Processes (530626)
Stefan Reimann1, Matthew L Rigby2, Ronald G Prinn3, Xuekun Fang3, Sunyoung Park4, Luke Western5, Alistair Manning6, Stephan Henne1, Martin K Vollmer7 and Alison Redington8, (1)Empa, Duebendorf, Switzerland, (2)University of Bristol, Bristol, United Kingdom, (3)MIT, Cambridge, MA, United States, (4)Seoul National University, Seoul, Korea, Republic of (South), (5)University of Bristol, School of Chemistry, Bristol, United Kingdom, (6)UK Meteorological Office, Climate Research, Exeter, United Kingdom, (7)EMPA, Duebendorf, Switzerland, (8)UK Meteorological Office, Exeter, United Kingdom
 
Potential CFC-11 Sources and Their Potential Impact on Future Emissions and Banks (540541)
Helen heleN.A.walter-Terrinoni@outlo, Organization Not Listed, Washington, DC, United States, Stephen A Montzka, NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, Christina Theodoridi, Natural Resources Defense Council, Washington DC, United States, Helen Tope, Energy International Australia, Melbourne, Australia and Jose Pons, Sicamu Inc, QUincy, FL, United States
 
Recent CFC-11 Enhancements in China, Nepal, Pakistan, Saudi Arabia and South Korea (549146)
Isobel J Simpson1, Donald Ray Blake1, Barbara Barletta1, Simone Meinardi1, Nicola J Blake1, Tao Wang2, Lingxiao Yang3, Elizabeth A. Stone4, Robert J Yokelson5, Muhammad Akhyar Farrukh6, Omar Siraj Aburizaiza7, Haider Khwaja8, Azhar Siddique9, Jahan Zeb10, Jung-Hun Woo11, Younha Kim11, Glenn S Diskin12 and David A Peterson13, (1)University of California Irvine, Irvine, CA, United States, (2)Hong Kong Polytechnic University, Department of Civil and Environmental Engineering, Hong Kong, China, (3)Shandong University, Environment Research Institute, Jinan, China, (4)University of Iowa, Iowa City, IA, United States, (5)University of Montana, Department of Chemistry, Missoula, MT, United States, (6)Forman Christian College, Lahore, Pakistan, (7)King Abdulaziz University, Jeddah, Saudi Arabia, (8)University at Albany, Department of Environmental Health Sciences, Albany, NY, United States, (9)Ministry of Public Health, Doha, Qatar, (10)Umm al Qura University, Department of Environment and Health Research, Mecca, Saudi Arabia, (11)Konkuk University, Seoul, South Korea, (12)NASA Langley Research Ctr, Hampton, VA, United States, (13)Naval Research Laboratory, Monterey, United States
 
Probabilistic quantification of chlorofluorocarbons banked in equipment and their contributions to emissions: results from a Bayesian assessment (551284)
Megan Lickley1, Susan Solomon2, Sarah Fletcher3, Guus J M Velders4, John S Daniel5, Matthew L Rigby6, Stephen A Montzka7, Lambert J. M. Kuijpers8 and Kane Stone1, (1)Massachusetts Institute of Technology, Cambridge, MA, United States, (2)MIT/EAPS, Cambridge, MA, United States, (3)Novato, CA, United States, (4)RIVM, Bilthoven, Netherlands, (5)NOAA Boulder, Boulder, CO, United States, (6)University of Bristol, Bristol, United Kingdom, (7)NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, (8)Technical University Eindhoven, Eindhoven, Netherlands
 
The Impact of Continuing CFC-11 Emissions on the Stratosphere (585380)
Eric L Fleming1,2, Paul A. Newman3, Qing Liang4, Luke Oman1, Feng Li5, John S Daniel6 and Lucy Carpenter7, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)NASA Goddard Space Flight Center, Science Systems and Applications, Inc., Greenbelt, MD, United States, (3)NASA GSFC, Code 610, Greenbelt, MD, United States, (4)NASA GSFC, Atmospheric Chemistry and Dynamic Laboratory, Code 614, Greenbelt, MD, United States, (5)Goddard Earth Science Technology and Research, Greenbelt, MD, United States, (6)NOAA Boulder, Boulder, CO, United States, (7)University of York, Department of Chemistry, York, United Kingdom
 
Potential Impact of Renewed CFC-11 Emissions on the Recovery of the Antarctic Ozone Hole (597429)
Martyn Chipperfield1, Sandip Dhomse1, Wuhu Feng2, Stephen A Montzka3, Ryan Hossaini4, James M Keeble5, John Adrian Pyle6, John S Daniel7 and Chris J Wilson1, (1)University of Leeds, Leeds, LS2, United Kingdom, (2)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (3)NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, (4)Lancaster University, Lancaster Environment Centre, Lancaster, United Kingdom, (5)University of Cambridge, Cambridge, United Kingdom, (6)Univ Cambridge, Cambridge, United Kingdom, (7)NOAA Boulder, Boulder, CO, United States
 
Atmospheric measurements of CFC-11 through most of 2019: Are global CFC-11 emissions back on the decline? (602170)
Stephen A Montzka1, Geoffrey S Dutton2, Eric A Ray3, Robert W Portmann4, Brad David Hall1, Matthew L Rigby5, Alistair Manning6 and James W Elkins1, (1)NOAA/ESRL GMD, Boulder, CO, United States, (2)Cooperative Institute for Research in Environmental Sciences, NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, (3)Cooperative Institute for Research in Environmental Sciences, NOAA Chemical Sciences Division, Boulder, CO, United States, (4)Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States, (5)University of Bristol, Bristol, United Kingdom, (6)UK Meteorological Office, Climate Research, Exeter, United Kingdom
 
Better quantification of the recent unexpected emission of CFC-11 (620626)
Robert W Portmann1, Eric A Ray2, John S Daniel1, Pengfei Yu3,4, Stephen A Montzka5 and Geoffrey S Dutton6, (1)NOAA Boulder, Boulder, CO, United States, (2)NOAA/CIRES, Boulder, United States, (3)CIRES, Boulder, CO, United States, (4)Jinan University, Guangzhou, China, (5)NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, (6)NOAA/ESRL GMD, Boulder, CO, United States
 
On natural atmospheric variability of CFC-11 (626722)
Alexandra Laeng1, Gabriele P Stiller2, Thomas von Clarmann1, Norbert Glatthor1, Udo Grabowski1 and John C Gille3, (1)Karlsruhe Institute of Technology, Karlsruhe, Germany, (2)KIT, Eggenstein-Leopoldsh, Germany, (3)NCAR, Boulder, CO, United States
See more of: Atmospheric Sciences
<< Previous Session Proposal | Next Session Proposal >>