AustralieFrV1, Main, Merge, bibRecord, 00B035

Simultaneous mass balance inverse modeling of methane and carbon monoxide

Identifieur interne : 00B035 ( Main/Merge ); précédent : 00B034; suivant : 00B036

Simultaneous mass balance inverse modeling of methane and carbon monoxide

Auteurs : T. M. Butler [Allemagne] ; P. J. Rayner [Australie, France] ; I. Simmonds [Australie] ; M. G. Lawrence [Allemagne]

Source :

Journal of geophysical research [ 0148-0227 ] ; 2005.

RBID : Pascal:06-0065666

Descripteurs français

Pascal (Inist)
- Bilan masse, Modélisation, Méthane, Monoxyde carbone, Carbone monoxyde, Problème inverse, NOAA, Air, Echantillonnage, Réseau, Modèle, Troposphère, Transport, Résolution spatiale, Variation interannuelle, Feu végétation, Monde, Masse air, Radical hydroxyle, Concentration, Rapport mélange, Zone humide, Anomalie, Gaz effet serre.
Wicri :
- topic : Zone humide.

English descriptors

KwdEn :
- Air mass, Carbon monoxide, Hydroxyl radicals, Interannual variation, Mixing ratio, Modeling, NOAA, Vegetation fire, air, anomalies, carbon monoxide, concentration, global, greenhouse gas, inverse problem, mass balance, methane, models, networks, sampling, spatial resolution, transport, troposphere, wetlands.

Abstract

We perform a simultaneous mass-balance inversion of atmospheric methane (CH₄) and carbon monoxide (CO) using measurements from the NOAA/CMDL Cooperative Air Sampling Network and a model of tropospheric transport and background chemistry over the period 1990-2000. Our method has a spatial resolution of a semihemisphere and a temporal resolution of 1 month. The deduced CO sources show relatively low interannual variability except around the major biomass burning event in 1997-1998, when we calculate an anomalous emission between July 1997 and December 1998 of 270 Tg(CO). This is enough to suppress the modeled global air mass weighted hydroxyl radical (OH) concentration during this time by 2.2%, and account for 75% of the observed increase in CH₄ mixing ratios during 1998. We compare our implied CH₄/CO emissions factors with published biomass burning emissions factors, suggesting that the remainder of the increase in CH₄ observed in 1998 is due to anomalously high biomass burning emissions, with CH₄ emissions from wetlands showing a small negative anomaly in 1998.

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Le document en format XML

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<author><name sortKey="Butler, T M" sort="Butler, T M" uniqKey="Butler T" first="T. M." last="Butler">T. M. Butler</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Air mass</term>
<term>Carbon monoxide</term>
<term>Hydroxyl radicals</term>
<term>Interannual variation</term>
<term>Mixing ratio</term>
<term>Modeling</term>
<term>NOAA</term>
<term>Vegetation fire</term>
<term>air</term>
<term>anomalies</term>
<term>carbon monoxide</term>
<term>concentration</term>
<term>global</term>
<term>greenhouse gas</term>
<term>inverse problem</term>
<term>mass balance</term>
<term>methane</term>
<term>models</term>
<term>networks</term>
<term>sampling</term>
<term>spatial resolution</term>
<term>transport</term>
<term>troposphere</term>
<term>wetlands</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Bilan masse</term>
<term>Modélisation</term>
<term>Méthane</term>
<term>Monoxyde carbone</term>
<term>Carbone monoxyde</term>
<term>Problème inverse</term>
<term>NOAA</term>
<term>Air</term>
<term>Echantillonnage</term>
<term>Réseau</term>
<term>Modèle</term>
<term>Troposphère</term>
<term>Transport</term>
<term>Résolution spatiale</term>
<term>Variation interannuelle</term>
<term>Feu végétation</term>
<term>Monde</term>
<term>Masse air</term>
<term>Radical hydroxyle</term>
<term>Concentration</term>
<term>Rapport mélange</term>
<term>Zone humide</term>
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<front><div type="abstract" xml:lang="en">We perform a simultaneous mass-balance inversion of atmospheric methane (CH<sub>4</sub>
) and carbon monoxide (CO) using measurements from the NOAA/CMDL Cooperative Air Sampling Network and a model of tropospheric transport and background chemistry over the period 1990-2000. Our method has a spatial resolution of a semihemisphere and a temporal resolution of 1 month. The deduced CO sources show relatively low interannual variability except around the major biomass burning event in 1997-1998, when we calculate an anomalous emission between July 1997 and December 1998 of 270 Tg(CO). This is enough to suppress the modeled global air mass weighted hydroxyl radical (OH) concentration during this time by 2.2%, and account for 75% of the observed increase in CH<sub>4</sub>
 mixing ratios during 1998. We compare our implied CH<sub>4</sub>
/CO emissions factors with published biomass burning emissions factors, suggesting that the remainder of the increase in CH<sub>4</sub>
 observed in 1998 is due to anomalously high biomass burning emissions, with CH<sub>4</sub>
 emissions from wetlands showing a small negative anomaly in 1998.</div>
</front>
</TEI>
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Simultaneous mass balance inverse modeling of methane and carbon monoxide

Simultaneous mass balance inverse modeling of methane and carbon monoxide

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri