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The sensitivity of stratospheric ozone changes through the 21st century to N<sub>2</sub>O and CH<sub>4</sub>

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Zeitschriftentitel: Atmospheric Chemistry and Physics
Personen und Körperschaften: Revell, L. E., Bodeker, G. E., Huck, P. E., Williamson, B. E., Rozanov, E.
In: Atmospheric Chemistry and Physics, 12, 2012, 23, S. 11309-11317
Format: E-Article
Sprache: Englisch
veröffentlicht:
Copernicus GmbH
Schlagwörter:
Atmospheric Science
author_facet Revell, L. E.
Bodeker, G. E.
Huck, P. E.
Williamson, B. E.
Rozanov, E.
Revell, L. E.
Bodeker, G. E.
Huck, P. E.
Williamson, B. E.
Rozanov, E.
author Revell, L. E.
Bodeker, G. E.
Huck, P. E.
Williamson, B. E.
Rozanov, E.
spellingShingle Revell, L. E.
Bodeker, G. E.
Huck, P. E.
Williamson, B. E.
Rozanov, E.
Atmospheric Chemistry and Physics
The sensitivity of stratospheric ozone changes through the 21st century to N<sub>2</sub>O and CH<sub>4</sub>
Atmospheric Science
author_sort revell, l. e.
spelling Revell, L. E. Bodeker, G. E. Huck, P. E. Williamson, B. E. Rozanov, E. 1680-7324 Copernicus GmbH Atmospheric Science http://dx.doi.org/10.5194/acp-12-11309-2012 <jats:p>Abstract. Through the 21st century, anthropogenic emissions of the greenhouse gases N2O and CH4 are projected to increase, thus increasing their atmospheric concentrations. Consequently, reactive nitrogen species produced from N2O and reactive hydrogen species produced from CH4 are expected to play an increasingly important role in determining stratospheric ozone concentrations. Eight chemistry-climate model simulations were performed to assess the sensitivity of stratospheric ozone to different emissions scenarios for N2O and CH4. Global-mean total column ozone increases through the 21st century in all eight simulations as a result of CO2-induced stratospheric cooling and decreasing stratospheric halogen concentrations. Larger N2O concentrations were associated with smaller ozone increases, due to reactive nitrogen-mediated ozone destruction. In the simulation with the largest N2O increase, global-mean total column ozone increased by 4.3 DU through the 21st century, compared with 10.0 DU in the simulation with the smallest N2O increase. In contrast, larger CH4 concentrations were associated with larger ozone increases; global-mean total column ozone increased by 16.7 DU through the 21st century in the simulation with the largest CH4 concentrations and by 4.4 DU in the simulation with the lowest CH4 concentrations. CH4 leads to ozone loss in the upper and lower stratosphere by increasing the rate of reactive hydrogen-mediated ozone loss cycles, however in the lower stratosphere and troposphere, CH4 leads to ozone increases due to photochemical smog-type chemistry. In addition to this mechanism, total column ozone increases due to H2O-induced cooling of the stratosphere, and slowing of the chlorine-catalyzed ozone loss cycles due to an increased rate of the CH4 + Cl reaction. Stratospheric column ozone through the 21st century exhibits a near-linear response to changes in N2O and CH4 surface concentrations, which provides a simple parameterization for the ozone response to changes in these gases. </jats:p> The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt; Atmospheric Chemistry and Physics
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title The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_unstemmed The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_full The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_fullStr The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_full_unstemmed The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_short The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_sort the sensitivity of stratospheric ozone changes through the 21st century to n&lt;sub&gt;2&lt;/sub&gt;o and ch&lt;sub&gt;4&lt;/sub&gt;
topic Atmospheric Science
url http://dx.doi.org/10.5194/acp-12-11309-2012
publishDate 2012
physical 11309-11317
description <jats:p>Abstract. Through the 21st century, anthropogenic emissions of the greenhouse gases N2O and CH4 are projected to increase, thus increasing their atmospheric concentrations. Consequently, reactive nitrogen species produced from N2O and reactive hydrogen species produced from CH4 are expected to play an increasingly important role in determining stratospheric ozone concentrations. Eight chemistry-climate model simulations were performed to assess the sensitivity of stratospheric ozone to different emissions scenarios for N2O and CH4. Global-mean total column ozone increases through the 21st century in all eight simulations as a result of CO2-induced stratospheric cooling and decreasing stratospheric halogen concentrations. Larger N2O concentrations were associated with smaller ozone increases, due to reactive nitrogen-mediated ozone destruction. In the simulation with the largest N2O increase, global-mean total column ozone increased by 4.3 DU through the 21st century, compared with 10.0 DU in the simulation with the smallest N2O increase. In contrast, larger CH4 concentrations were associated with larger ozone increases; global-mean total column ozone increased by 16.7 DU through the 21st century in the simulation with the largest CH4 concentrations and by 4.4 DU in the simulation with the lowest CH4 concentrations. CH4 leads to ozone loss in the upper and lower stratosphere by increasing the rate of reactive hydrogen-mediated ozone loss cycles, however in the lower stratosphere and troposphere, CH4 leads to ozone increases due to photochemical smog-type chemistry. In addition to this mechanism, total column ozone increases due to H2O-induced cooling of the stratosphere, and slowing of the chlorine-catalyzed ozone loss cycles due to an increased rate of the CH4 + Cl reaction. Stratospheric column ozone through the 21st century exhibits a near-linear response to changes in N2O and CH4 surface concentrations, which provides a simple parameterization for the ozone response to changes in these gases. </jats:p>
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author Revell, L. E., Bodeker, G. E., Huck, P. E., Williamson, B. E., Rozanov, E.
author_facet Revell, L. E., Bodeker, G. E., Huck, P. E., Williamson, B. E., Rozanov, E., Revell, L. E., Bodeker, G. E., Huck, P. E., Williamson, B. E., Rozanov, E.
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description <jats:p>Abstract. Through the 21st century, anthropogenic emissions of the greenhouse gases N2O and CH4 are projected to increase, thus increasing their atmospheric concentrations. Consequently, reactive nitrogen species produced from N2O and reactive hydrogen species produced from CH4 are expected to play an increasingly important role in determining stratospheric ozone concentrations. Eight chemistry-climate model simulations were performed to assess the sensitivity of stratospheric ozone to different emissions scenarios for N2O and CH4. Global-mean total column ozone increases through the 21st century in all eight simulations as a result of CO2-induced stratospheric cooling and decreasing stratospheric halogen concentrations. Larger N2O concentrations were associated with smaller ozone increases, due to reactive nitrogen-mediated ozone destruction. In the simulation with the largest N2O increase, global-mean total column ozone increased by 4.3 DU through the 21st century, compared with 10.0 DU in the simulation with the smallest N2O increase. In contrast, larger CH4 concentrations were associated with larger ozone increases; global-mean total column ozone increased by 16.7 DU through the 21st century in the simulation with the largest CH4 concentrations and by 4.4 DU in the simulation with the lowest CH4 concentrations. CH4 leads to ozone loss in the upper and lower stratosphere by increasing the rate of reactive hydrogen-mediated ozone loss cycles, however in the lower stratosphere and troposphere, CH4 leads to ozone increases due to photochemical smog-type chemistry. In addition to this mechanism, total column ozone increases due to H2O-induced cooling of the stratosphere, and slowing of the chlorine-catalyzed ozone loss cycles due to an increased rate of the CH4 + Cl reaction. Stratospheric column ozone through the 21st century exhibits a near-linear response to changes in N2O and CH4 surface concentrations, which provides a simple parameterization for the ozone response to changes in these gases. </jats:p>
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spelling Revell, L. E. Bodeker, G. E. Huck, P. E. Williamson, B. E. Rozanov, E. 1680-7324 Copernicus GmbH Atmospheric Science http://dx.doi.org/10.5194/acp-12-11309-2012 <jats:p>Abstract. Through the 21st century, anthropogenic emissions of the greenhouse gases N2O and CH4 are projected to increase, thus increasing their atmospheric concentrations. Consequently, reactive nitrogen species produced from N2O and reactive hydrogen species produced from CH4 are expected to play an increasingly important role in determining stratospheric ozone concentrations. Eight chemistry-climate model simulations were performed to assess the sensitivity of stratospheric ozone to different emissions scenarios for N2O and CH4. Global-mean total column ozone increases through the 21st century in all eight simulations as a result of CO2-induced stratospheric cooling and decreasing stratospheric halogen concentrations. Larger N2O concentrations were associated with smaller ozone increases, due to reactive nitrogen-mediated ozone destruction. In the simulation with the largest N2O increase, global-mean total column ozone increased by 4.3 DU through the 21st century, compared with 10.0 DU in the simulation with the smallest N2O increase. In contrast, larger CH4 concentrations were associated with larger ozone increases; global-mean total column ozone increased by 16.7 DU through the 21st century in the simulation with the largest CH4 concentrations and by 4.4 DU in the simulation with the lowest CH4 concentrations. CH4 leads to ozone loss in the upper and lower stratosphere by increasing the rate of reactive hydrogen-mediated ozone loss cycles, however in the lower stratosphere and troposphere, CH4 leads to ozone increases due to photochemical smog-type chemistry. In addition to this mechanism, total column ozone increases due to H2O-induced cooling of the stratosphere, and slowing of the chlorine-catalyzed ozone loss cycles due to an increased rate of the CH4 + Cl reaction. Stratospheric column ozone through the 21st century exhibits a near-linear response to changes in N2O and CH4 surface concentrations, which provides a simple parameterization for the ozone response to changes in these gases. </jats:p> The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt; Atmospheric Chemistry and Physics
spellingShingle Revell, L. E., Bodeker, G. E., Huck, P. E., Williamson, B. E., Rozanov, E., Atmospheric Chemistry and Physics, The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;, Atmospheric Science
title The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_full The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_fullStr The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_full_unstemmed The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_short The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
title_sort the sensitivity of stratospheric ozone changes through the 21st century to n&lt;sub&gt;2&lt;/sub&gt;o and ch&lt;sub&gt;4&lt;/sub&gt;
title_unstemmed The sensitivity of stratospheric ozone changes through the 21st century to N&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;
topic Atmospheric Science
url http://dx.doi.org/10.5194/acp-12-11309-2012