Characterizing the tropospheric ozone response to methane emission controls and the benefits to climate and air quality
Identifieur interne : 000110 ( PascalFrancis/Corpus ); précédent : 000109; suivant : 000111Characterizing the tropospheric ozone response to methane emission controls and the benefits to climate and air quality
Auteurs : Arlene M. Fiore ; J. Jason West ; Larry W. Horowitz ; Vaishali Naik ; M. Daniel SchwarzkopfSource :
- Journal of geophysical research [ 0148-0227 ] ; 2008.
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- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
[1] Reducing methane (CH4) emissions is an attractive option for jointly addressing climate and ozone (03) air quality goals. With multidecadal full-chemistry transient simulations in the MOZART-2 tropospheric chemistry model, we show that tropospheric O3 responds approximately linearly to changes in CH4 emissions over a range of anthropogenic emissions from 0-430 Tg CH4 a-1 (0.11-0.16 Tg tropospheric 03 or ∼ 11-15 ppt global mean surface O3 decrease per Tg a-1 CH4 reduced). We find that neither the air quality nor climate benefits depend strongly on the location of the CH4 emission reductions, implying that the lowest cost emission controls can be targeted. With a series of future (2005-2030) transient simulations, we demonstrate that cost-effective CH4 controls would offset the positive climate forcing from CH4 and 03 that would otherwise occur (from increases in NOx and CH4 emissions in the baseline scenario) and improve O3 air quality. We estimate that anthropogenic CH4 contributes 0.7 Wm-2 to climate forcing and ∼4 ppb to surface 03 in 2030 under the baseline scenario. Although the response of surface 03 to CH4 is relatively uniform spatially compared to that from other 03 precursors, it is strongest in regions where surface air mixes frequently with the free troposphere and where the local 03 formation regime is NOX-saturated. In the model, CH4 oxidation within the boundary layer (below ∼2.5 km) contributes more to surface 03 than CH4 oxidation in the free troposphere. In NOX-saturated regions, the surface 03 sensitivity to CH4 can be twice that of the global mean, with >70% of this sensitivity resulting from boundary layer oxidation of CH4. Accurately representing the NOx distribution is thus crucial for quantifying the O3 sensitivity to CH4.
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Pour connaître la documentation sur le format Inist Standard.
pA |
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Format Inist (serveur)
NO : | PASCAL 08-0268210 INIST |
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ET : | Characterizing the tropospheric ozone response to methane emission controls and the benefits to climate and air quality |
AU : | FIORE (Arlene M.); WEST (J. Jason); HOROWITZ (Larry W.); NAIK (Vaishali); SCHWARZKOPF (M. Daniel) |
AF : | NOAA Geophysical Fluid Dynamics Laboratory/Princeton, New Jersey/Etats-Unis (1 aut., 3 aut., 5 aut.); Atmospheric and Oceanic Sciences Program, Princeton University/Princeton, New Jersey/Etats-Unis (2 aut.); Woodrow Wilson School of Public and International Affairs, Princeton University/Princeton, New Jersey/Etats-Unis (2 aut., 4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Journal of geophysical research; ISSN 0148-0227; Etats-Unis; Da. 2008; Vol. 113; No. D8; D08307.1-D08307.16; Bibl. 1 p.1/4 |
LA : | Anglais |
EA : | [1] Reducing methane (CH4) emissions is an attractive option for jointly addressing climate and ozone (03) air quality goals. With multidecadal full-chemistry transient simulations in the MOZART-2 tropospheric chemistry model, we show that tropospheric O3 responds approximately linearly to changes in CH4 emissions over a range of anthropogenic emissions from 0-430 Tg CH4 a-1 (0.11-0.16 Tg tropospheric 03 or ∼ 11-15 ppt global mean surface O3 decrease per Tg a-1 CH4 reduced). We find that neither the air quality nor climate benefits depend strongly on the location of the CH4 emission reductions, implying that the lowest cost emission controls can be targeted. With a series of future (2005-2030) transient simulations, we demonstrate that cost-effective CH4 controls would offset the positive climate forcing from CH4 and 03 that would otherwise occur (from increases in NOx and CH4 emissions in the baseline scenario) and improve O3 air quality. We estimate that anthropogenic CH4 contributes 0.7 Wm-2 to climate forcing and ∼4 ppb to surface 03 in 2030 under the baseline scenario. Although the response of surface 03 to CH4 is relatively uniform spatially compared to that from other 03 precursors, it is strongest in regions where surface air mixes frequently with the free troposphere and where the local 03 formation regime is NOX-saturated. In the model, CH4 oxidation within the boundary layer (below ∼2.5 km) contributes more to surface 03 than CH4 oxidation in the free troposphere. In NOX-saturated regions, the surface 03 sensitivity to CH4 can be twice that of the global mean, with >70% of this sensitivity resulting from boundary layer oxidation of CH4. Accurately representing the NOx distribution is thus crucial for quantifying the O3 sensitivity to CH4. |
CC : | 001E; 001E01; 220 |
FD : | Troposphère; Ozone; Méthane; Climat; Qualité air; Phénomène transitoire; Simulation; Modèle; Monde; Réduction; Coût; Forçage; Ligne base; Phénomène précurseur; Précurseur; Air; Oxydation; Couche limite; Analyse sensibilité; Gaz effet serre |
ED : | troposphere; ozone; methane; climate; Air quality; transient phenomena; simulation; models; global; reduction; cost; Forcing; baseline; precursors; Precursor; air; oxidation; boundary layer; sensitivity analysis; greenhouse gas |
SD : | Ozono; Metano; Clima; Calidad aire; Simulación; Modelo; Mundo; Costo; Forzamiento; Fenómeno precursor; Precursor; Oxidación; Capa límite |
LO : | INIST-3144.354000197746610400 |
ID : | 08-0268210 |
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Pascal:08-0268210Le document en format XML
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<term>Forcing</term>
<term>Precursor</term>
<term>air</term>
<term>baseline</term>
<term>boundary layer</term>
<term>climate</term>
<term>cost</term>
<term>global</term>
<term>greenhouse gas</term>
<term>methane</term>
<term>models</term>
<term>oxidation</term>
<term>ozone</term>
<term>precursors</term>
<term>reduction</term>
<term>sensitivity analysis</term>
<term>simulation</term>
<term>transient phenomena</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Troposphère</term>
<term>Ozone</term>
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<term>Climat</term>
<term>Qualité air</term>
<term>Phénomène transitoire</term>
<term>Simulation</term>
<term>Modèle</term>
<term>Monde</term>
<term>Réduction</term>
<term>Coût</term>
<term>Forçage</term>
<term>Ligne base</term>
<term>Phénomène précurseur</term>
<term>Précurseur</term>
<term>Air</term>
<term>Oxydation</term>
<term>Couche limite</term>
<term>Analyse sensibilité</term>
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<front><div type="abstract" xml:lang="en">[1] Reducing methane (CH<sub>4</sub>
) emissions is an attractive option for jointly addressing climate and ozone (0<sub>3</sub>
) air quality goals. With multidecadal full-chemistry transient simulations in the MOZART-2 tropospheric chemistry model, we show that tropospheric O<sub>3</sub>
responds approximately linearly to changes in CH<sub>4</sub>
emissions over a range of anthropogenic emissions from 0-430 Tg CH<sub>4</sub>
a<sup>-1</sup>
(0.11-0.16 Tg tropospheric 0<sub>3</sub>
or ∼ 11-15 ppt global mean surface O<sub>3</sub>
decrease per Tg a<sup>-1</sup>
CH<sub>4</sub>
reduced). We find that neither the air quality nor climate benefits depend strongly on the location of the CH<sub>4</sub>
emission reductions, implying that the lowest cost emission controls can be targeted. With a series of future (2005-2030) transient simulations, we demonstrate that cost-effective CH<sub>4</sub>
controls would offset the positive climate forcing from CH<sub>4</sub>
and 0<sub>3</sub>
that would otherwise occur (from increases in NO<sub>x</sub>
and CH<sub>4</sub>
emissions in the baseline scenario) and improve O<sub>3</sub>
air quality. We estimate that anthropogenic CH<sub>4</sub>
contributes 0.7 Wm-<sup>2</sup>
to climate forcing and ∼4 ppb to surface 0<sub>3</sub>
in 2030 under the baseline scenario. Although the response of surface 0<sub>3</sub>
to CH<sub>4</sub>
is relatively uniform spatially compared to that from other 0<sub>3</sub>
precursors, it is strongest in regions where surface air mixes frequently with the free troposphere and where the local 0<sub>3</sub>
formation regime is NO<sub>X</sub>
-saturated. In the model, CH<sub>4</sub>
oxidation within the boundary layer (below ∼2.5 km) contributes more to surface 0<sub>3</sub>
than CH<sub>4</sub>
oxidation in the free troposphere. In NO<sub>X</sub>
-saturated regions, the surface 0<sub>3</sub>
sensitivity to CH<sub>4</sub>
can be twice that of the global mean, with >70% of this sensitivity resulting from boundary layer oxidation of CH<sub>4</sub>
. Accurately representing the NO<sub>x</sub>
distribution is thus crucial for quantifying the O<sub>3</sub>
sensitivity to CH<sub>4</sub>
.</div>
</front>
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<fA14 i1="03"><s1>Woodrow Wilson School of Public and International Affairs, Princeton University</s1>
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<fC01 i1="01" l="ENG"><s0>[1] Reducing methane (CH<sub>4</sub>
) emissions is an attractive option for jointly addressing climate and ozone (0<sub>3</sub>
) air quality goals. With multidecadal full-chemistry transient simulations in the MOZART-2 tropospheric chemistry model, we show that tropospheric O<sub>3</sub>
responds approximately linearly to changes in CH<sub>4</sub>
emissions over a range of anthropogenic emissions from 0-430 Tg CH<sub>4</sub>
a<sup>-1</sup>
(0.11-0.16 Tg tropospheric 0<sub>3</sub>
or ∼ 11-15 ppt global mean surface O<sub>3</sub>
decrease per Tg a<sup>-1</sup>
CH<sub>4</sub>
reduced). We find that neither the air quality nor climate benefits depend strongly on the location of the CH<sub>4</sub>
emission reductions, implying that the lowest cost emission controls can be targeted. With a series of future (2005-2030) transient simulations, we demonstrate that cost-effective CH<sub>4</sub>
controls would offset the positive climate forcing from CH<sub>4</sub>
and 0<sub>3</sub>
that would otherwise occur (from increases in NO<sub>x</sub>
and CH<sub>4</sub>
emissions in the baseline scenario) and improve O<sub>3</sub>
air quality. We estimate that anthropogenic CH<sub>4</sub>
contributes 0.7 Wm-<sup>2</sup>
to climate forcing and ∼4 ppb to surface 0<sub>3</sub>
in 2030 under the baseline scenario. Although the response of surface 0<sub>3</sub>
to CH<sub>4</sub>
is relatively uniform spatially compared to that from other 0<sub>3</sub>
precursors, it is strongest in regions where surface air mixes frequently with the free troposphere and where the local 0<sub>3</sub>
formation regime is NO<sub>X</sub>
-saturated. In the model, CH<sub>4</sub>
oxidation within the boundary layer (below ∼2.5 km) contributes more to surface 0<sub>3</sub>
than CH<sub>4</sub>
oxidation in the free troposphere. In NO<sub>X</sub>
-saturated regions, the surface 0<sub>3</sub>
sensitivity to CH<sub>4</sub>
can be twice that of the global mean, with >70% of this sensitivity resulting from boundary layer oxidation of CH<sub>4</sub>
. Accurately representing the NO<sub>x</sub>
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<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="ENG"><s0>cost</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="SPA"><s0>Costo</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Forçage</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Forcing</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Forzamiento</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="2" l="FRE"><s0>Ligne base</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="2" l="ENG"><s0>baseline</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="2" l="FRE"><s0>Phénomène précurseur</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="2" l="ENG"><s0>precursors</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="2" l="SPA"><s0>Fenómeno precursor</s0>
<s5>14</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Précurseur</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Precursor</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Precursor</s0>
<s5>15</s5>
</fC03>
<fC03 i1="16" i2="2" l="FRE"><s0>Air</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="2" l="ENG"><s0>air</s0>
<s5>16</s5>
</fC03>
<fC03 i1="17" i2="2" l="FRE"><s0>Oxydation</s0>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="2" l="ENG"><s0>oxidation</s0>
<s5>17</s5>
</fC03>
<fC03 i1="17" i2="2" l="SPA"><s0>Oxidación</s0>
<s5>17</s5>
</fC03>
<fC03 i1="18" i2="2" l="FRE"><s0>Couche limite</s0>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="2" l="ENG"><s0>boundary layer</s0>
<s5>18</s5>
</fC03>
<fC03 i1="18" i2="2" l="SPA"><s0>Capa límite</s0>
<s5>18</s5>
</fC03>
<fC03 i1="19" i2="2" l="FRE"><s0>Analyse sensibilité</s0>
<s5>19</s5>
</fC03>
<fC03 i1="19" i2="2" l="ENG"><s0>sensitivity analysis</s0>
<s5>19</s5>
</fC03>
<fC03 i1="20" i2="2" l="FRE"><s0>Gaz effet serre</s0>
<s5>20</s5>
</fC03>
<fC03 i1="20" i2="2" l="ENG"><s0>greenhouse gas</s0>
<s5>20</s5>
</fC03>
<fN21><s1>168</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 08-0268210 INIST</NO>
<ET>Characterizing the tropospheric ozone response to methane emission controls and the benefits to climate and air quality</ET>
<AU>FIORE (Arlene M.); WEST (J. Jason); HOROWITZ (Larry W.); NAIK (Vaishali); SCHWARZKOPF (M. Daniel)</AU>
<AF>NOAA Geophysical Fluid Dynamics Laboratory/Princeton, New Jersey/Etats-Unis (1 aut., 3 aut., 5 aut.); Atmospheric and Oceanic Sciences Program, Princeton University/Princeton, New Jersey/Etats-Unis (2 aut.); Woodrow Wilson School of Public and International Affairs, Princeton University/Princeton, New Jersey/Etats-Unis (2 aut., 4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of geophysical research; ISSN 0148-0227; Etats-Unis; Da. 2008; Vol. 113; No. D8; D08307.1-D08307.16; Bibl. 1 p.1/4</SO>
<LA>Anglais</LA>
<EA>[1] Reducing methane (CH<sub>4</sub>
) emissions is an attractive option for jointly addressing climate and ozone (0<sub>3</sub>
) air quality goals. With multidecadal full-chemistry transient simulations in the MOZART-2 tropospheric chemistry model, we show that tropospheric O<sub>3</sub>
responds approximately linearly to changes in CH<sub>4</sub>
emissions over a range of anthropogenic emissions from 0-430 Tg CH<sub>4</sub>
a<sup>-1</sup>
(0.11-0.16 Tg tropospheric 0<sub>3</sub>
or ∼ 11-15 ppt global mean surface O<sub>3</sub>
decrease per Tg a<sup>-1</sup>
CH<sub>4</sub>
reduced). We find that neither the air quality nor climate benefits depend strongly on the location of the CH<sub>4</sub>
emission reductions, implying that the lowest cost emission controls can be targeted. With a series of future (2005-2030) transient simulations, we demonstrate that cost-effective CH<sub>4</sub>
controls would offset the positive climate forcing from CH<sub>4</sub>
and 0<sub>3</sub>
that would otherwise occur (from increases in NO<sub>x</sub>
and CH<sub>4</sub>
emissions in the baseline scenario) and improve O<sub>3</sub>
air quality. We estimate that anthropogenic CH<sub>4</sub>
contributes 0.7 Wm-<sup>2</sup>
to climate forcing and ∼4 ppb to surface 0<sub>3</sub>
in 2030 under the baseline scenario. Although the response of surface 0<sub>3</sub>
to CH<sub>4</sub>
is relatively uniform spatially compared to that from other 0<sub>3</sub>
precursors, it is strongest in regions where surface air mixes frequently with the free troposphere and where the local 0<sub>3</sub>
formation regime is NO<sub>X</sub>
-saturated. In the model, CH<sub>4</sub>
oxidation within the boundary layer (below ∼2.5 km) contributes more to surface 0<sub>3</sub>
than CH<sub>4</sub>
oxidation in the free troposphere. In NO<sub>X</sub>
-saturated regions, the surface 0<sub>3</sub>
sensitivity to CH<sub>4</sub>
can be twice that of the global mean, with >70% of this sensitivity resulting from boundary layer oxidation of CH<sub>4</sub>
. Accurately representing the NO<sub>x</sub>
distribution is thus crucial for quantifying the O<sub>3</sub>
sensitivity to CH<sub>4</sub>
.</EA>
<CC>001E; 001E01; 220</CC>
<FD>Troposphère; Ozone; Méthane; Climat; Qualité air; Phénomène transitoire; Simulation; Modèle; Monde; Réduction; Coût; Forçage; Ligne base; Phénomène précurseur; Précurseur; Air; Oxydation; Couche limite; Analyse sensibilité; Gaz effet serre</FD>
<ED>troposphere; ozone; methane; climate; Air quality; transient phenomena; simulation; models; global; reduction; cost; Forcing; baseline; precursors; Precursor; air; oxidation; boundary layer; sensitivity analysis; greenhouse gas</ED>
<SD>Ozono; Metano; Clima; Calidad aire; Simulación; Modelo; Mundo; Costo; Forzamiento; Fenómeno precursor; Precursor; Oxidación; Capa límite</SD>
<LO>INIST-3144.354000197746610400</LO>
<ID>08-0268210</ID>
</server>
</inist>
</record>
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