Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies
Chlorofluorocarbons (CFCs) play a key role in stratospheric ozone loss and are strong infrared absorbers that contribute to global warming. The stratospheric lifetimes of CFCs are a measure of their stratospheric loss rates that are needed to determine global warming and ozone depletion pot...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/14/12479/2014/acp-14-12479-2014.pdf |
| _version_ | 1818954718468112384 |
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| author | L. Hoffmann C. M. Hoppe R. Müller G. S. Dutton J. C. Gille S. Griessbach A. Jones C. I. Meyer R. Spang C. M. Volk K. A. Walker |
| author_facet | L. Hoffmann C. M. Hoppe R. Müller G. S. Dutton J. C. Gille S. Griessbach A. Jones C. I. Meyer R. Spang C. M. Volk K. A. Walker |
| author_sort | L. Hoffmann |
| collection | DOAJ |
| description | Chlorofluorocarbons (CFCs) play a key role in stratospheric ozone
loss and are strong infrared absorbers that contribute to global
warming. The stratospheric lifetimes of CFCs are a measure of their
stratospheric loss rates that are needed to determine global warming
and ozone depletion potentials. We applied the tracer–tracer
correlation approach to zonal mean climatologies from satellite
measurements and model data to assess the lifetimes of CFCl<sub>3</sub>
(CFC-11) and CF<sub>2</sub>Cl<sub>2</sub> (CFC-12). We present estimates of the
CFC-11/CFC-12 lifetime ratio and the absolute lifetime of CFC-12,
based on a reference lifetime of 52 years for CFC-11. We analyzed
climatologies from three satellite missions, the Atmospheric
Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS), the
HIgh Resolution Dynamics Limb Sounder (HIRDLS), and the Michelson
Interferometer for Passive Atmospheric Sounding (MIPAS). We found a
CFC-11/CFC-12 lifetime ratio of 0.47±0.08 and a CFC-12 lifetime
of 112(96–133) years for ACE-FTS, a ratio of 0.46±0.07 and a
lifetime of 113(97–134) years for HIRDLS, and a ratio of
0.46±0.08 and a lifetime of 114(98–136) years for MIPAS. The
error-weighted, combined CFC-11/CFC-12 lifetime ratio is
0.46±0.04 and the CFC-12 lifetime estimate is
113(103–124) years. These results agree with the recent
Stratosphere-troposphere Processes And their Role in Climate (SPARC)
reassessment, which recommends lifetimes of 52(43–67) years and
102(88–122) years, respectively. Having smaller uncertainties than
the results from other recent studies, our estimates can help to
better constrain CFC-11 and CFC-12 lifetime recommendations in
future scientific studies and assessments. Furthermore, the
satellite observations were used to validate first simulation
results from a new coupled model system, which integrates a
Lagrangian chemistry transport model into a climate model. For the
coupled model we found a CFC-11/CFC-12 lifetime ratio of
0.48±0.07 and a CFC-12 lifetime of 110(95–129) years, based on a
10-year perpetual run. Closely reproducing the satellite
observations, the new model system will likely become a useful tool
to assess the impact of advective transport, mixing, and
photochemistry as well as climatological variability on the
stratospheric lifetimes of long-lived tracers. |
| first_indexed | 2024-12-20T10:26:37Z |
| format | Article |
| id | doaj.art-8c0e9676d13d4d96b549b37d127e4eb6 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-20T10:26:37Z |
| publishDate | 2014-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-8c0e9676d13d4d96b549b37d127e4eb62022-12-21T19:43:49ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242014-11-011422124791249710.5194/acp-14-12479-2014Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologiesL. Hoffmann0C. M. Hoppe1R. Müller2G. S. Dutton3J. C. Gille4S. Griessbach5A. Jones6C. I. Meyer7R. Spang8C. M. Volk9K. A. Walker10Jülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, GermanyInstitut für Energie- und Klimaforschung, Forschungszentrum Jülich, Jülich, GermanyInstitut für Energie- und Klimaforschung, Forschungszentrum Jülich, Jülich, GermanyNOAA Earth System Research Laboratory, Global Monitoring Division, Boulder, CO, USANational Center for Atmospheric Research, Boulder, CO, USAJülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, GermanyDepartment of Physics, University of Toronto, Toronto, CanadaJülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, GermanyInstitut für Energie- und Klimaforschung, Forschungszentrum Jülich, Jülich, GermanyBergische Universität Wuppertal, Fachbereich Physik, Wuppertal, GermanyDepartment of Physics, University of Toronto, Toronto, CanadaChlorofluorocarbons (CFCs) play a key role in stratospheric ozone loss and are strong infrared absorbers that contribute to global warming. The stratospheric lifetimes of CFCs are a measure of their stratospheric loss rates that are needed to determine global warming and ozone depletion potentials. We applied the tracer–tracer correlation approach to zonal mean climatologies from satellite measurements and model data to assess the lifetimes of CFCl<sub>3</sub> (CFC-11) and CF<sub>2</sub>Cl<sub>2</sub> (CFC-12). We present estimates of the CFC-11/CFC-12 lifetime ratio and the absolute lifetime of CFC-12, based on a reference lifetime of 52 years for CFC-11. We analyzed climatologies from three satellite missions, the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS), the HIgh Resolution Dynamics Limb Sounder (HIRDLS), and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). We found a CFC-11/CFC-12 lifetime ratio of 0.47±0.08 and a CFC-12 lifetime of 112(96–133) years for ACE-FTS, a ratio of 0.46±0.07 and a lifetime of 113(97–134) years for HIRDLS, and a ratio of 0.46±0.08 and a lifetime of 114(98–136) years for MIPAS. The error-weighted, combined CFC-11/CFC-12 lifetime ratio is 0.46±0.04 and the CFC-12 lifetime estimate is 113(103–124) years. These results agree with the recent Stratosphere-troposphere Processes And their Role in Climate (SPARC) reassessment, which recommends lifetimes of 52(43–67) years and 102(88–122) years, respectively. Having smaller uncertainties than the results from other recent studies, our estimates can help to better constrain CFC-11 and CFC-12 lifetime recommendations in future scientific studies and assessments. Furthermore, the satellite observations were used to validate first simulation results from a new coupled model system, which integrates a Lagrangian chemistry transport model into a climate model. For the coupled model we found a CFC-11/CFC-12 lifetime ratio of 0.48±0.07 and a CFC-12 lifetime of 110(95–129) years, based on a 10-year perpetual run. Closely reproducing the satellite observations, the new model system will likely become a useful tool to assess the impact of advective transport, mixing, and photochemistry as well as climatological variability on the stratospheric lifetimes of long-lived tracers.http://www.atmos-chem-phys.net/14/12479/2014/acp-14-12479-2014.pdf |
| spellingShingle | L. Hoffmann C. M. Hoppe R. Müller G. S. Dutton J. C. Gille S. Griessbach A. Jones C. I. Meyer R. Spang C. M. Volk K. A. Walker Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies Atmospheric Chemistry and Physics |
| title | Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies |
| title_full | Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies |
| title_fullStr | Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies |
| title_full_unstemmed | Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies |
| title_short | Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies |
| title_sort | stratospheric lifetime ratio of cfc 11 and cfc 12 from satellite and model climatologies |
| url | http://www.atmos-chem-phys.net/14/12479/2014/acp-14-12479-2014.pdf |
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