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SPARC Report on the Mystery of Carbon TetrachlorideThe Montreal Protocol (MP) controls the production and consumption of carbon tetrachloride (CCl4 or CTC) and other ozone-depleting substances (ODSs) for emissive uses. CCl4 is a major ODS, accounting for about 12% of the globally averaged inorganic chlorine and bromine in the stratosphere, compared to 14% for CFC-12 in 2012. In spite of the MP controls, there are large ongoing emissions of CCl4 into the atmosphere. Estimates of emissions from various techniques ought to yield similar numbers. However, the recent WMO/UNEP Scientific Assessment of Ozone Depletion estimated a 2007-2012 CCl4 bottom-up emission of 1-4 Gg/year (1-4 kilotonnes/year), based on country-by-country reports to UNEP, and a global top-down emissions estimate of 57 Gg/ year, based on atmospheric measurements. This 54 Gg/year difference has not been explained. In order to assess the current knowledge on global CCl4 sources and sinks, stakeholders from industrial, governmental, and the scientific communities came together at the “Solving the Mystery of Carbon Tetrachloride” workshop, which was held from 4-6 October 2015 at Empa in Dübendorf, Switzerland. During this workshop, several new findings were brought forward by the participants on CCl4 emissions and related science.
Document ID
20180003342
Acquisition Source
Goddard Space Flight Center
Document Type
Other
Authors
Ahmadzai, Husamuddin
(Swedish Environmental Protection Agency Stockholm, Sweden)
Bock, Ronald P.
(Chemours International Operations Sarl Le Grand-Saconnex, Switzerland)
Burkholder, James B.
(National Oceanic and Atmospheric Administration (NOAA) Washington, DC, United States)
Butler, James H.
(National Oceanic and Atmospheric Administration (NOAA) Washington, DC, United States)
Chatterjee, Abhijit
(Bose Research Inst. Calcutta, India)
Chipperfield, Martyn
(University of Leeds Leeds, United Kingdom)
Daniel, John S.
(National Oceanic and Atmospheric Administration (NOAA) Washington, DC, United States)
Derek, Nada
(Commonwealth Scientific and Industrial Research Organization (CSIRO) Canberra, Australia)
Fleming, Eric L.
(Science Systems and Applications, Inc. (SSAI) Lanham, MD, United States)
Fraser, Paul J.
(Commonwealth Scientific and Industrial Research Organization (CSIRO) Canberra, Australia)
Graziosi, Francesco
(Università degli Studi di Urbino Carlo Bo Urbino, Italy)
Hall, Bradley
(National Oceanic and Atmospheric Administration (NOAA) Washington, DC, United States)
Hannigan, James W.
(National Center for Atmospheric Research Boulder, CO, United States)
Happell, Jim
(Miami Univ. FL, United States)
Harrison, Jeremy J.
(University of Leicester Leicester, United Kingdom)
Lu, Jianxin
(Peking University Beijing, China)
Hu, Lei
(National Oceanic and Atmospheric Administration (NOAA) Washington, DC, United States)
Jucks, Kenneth W.
(NASA Headquarters Washington, DC, United States)
Kinnison, Douglas E.
(National Center for Atmospheric Research Boulder, CO, United States)
Kuijpers, Lambert
(Technische Universiteit Eindhoven Eindhoven, Netherlands)
Kurylo, Michael J.
(Universities Space Research Association (USRA) Greenbelt, MD, United States)
Lezeaux, Olivier
(NOVELTIS Labege, France)
Liang, Qing
(Universities Space Research Association (USRA) Greenbelt, MD, United States)
Lupo, Frederick
(NOVELTIS Labege, France)
Mahieu, Emmanuel
(Université de Liège Liège, Belgium)
Maione, Michela
(Università degli Studi di Urbino Carlo Bo Urbino, Italy)
McCulloch, Archie
(University of Bristol Bristol, United Kingdom)
Montzka, Stephen A.
(National Oceanic and Atmospheric Administration (NOAA) Washington, DC, United States)
Newman, Paul A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Odabasi, Mustafa
(Dokuz Eylul Univ. Izmir, Turkey)
Ohnishi, Keiichi
(Asahi Glass Co. Ltd. Yokohama, Japan)
Park, Sunyoung
(Kyungpook National University Daegu, Korea, Republic of)
Reimann, Stefan
(EMPA Dubendorf, Switzerland)
Rhew, Robert C.
(California Univ. Berkeley, CA, United States)
Rigby, Matthew
(University of Bristol Bristol, United Kingdom)
Sherry, David
(Nolan Sherry & Associates Ltd. Surrey, United Kingdom)
Simpson, Isobel J.
(California Univ. (UCI) Irvine, CA, United States)
Singh, Hanwant B.
(NASA Ames Research Center Moffett Field, CA, United States)
Suntharalingam, Parvadha
(University of East Anglia Norwich, England, United Kingdom)
Tummon, Fiona
(Eidgenossische Technische Hochschule (ETH) Zurich, Switzerland)
Tellaetxe, Iratxe Uria
(University of the Basque Country (UPV/EHU) Leioa, Spain)
von Clarmann, Thomas
(Karlsruher Institut für Technologie Karlsruhe, Germany)
Weiss, Ray F.
(California Univ. San Diego, CA, United States)
Yao, Bo
(Central Meteorological Service Beijing, China)
Yvon-Lewis, Shari A.
(Texas A&M Univ. College Station, TX, United States)
Zhou, Lingxi
(Central Meteorological Service Beijing, China)
Date Acquired
June 4, 2018
Publication Date
July 1, 2016
Subject Category
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN34664
Funding Number(s)
CONTRACT_GRANT: NNG12HP08C
CONTRACT_GRANT: NNG11HP16A
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
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