Analysis of long-term observations of NO<sub>x</sub> and CO in megacities and application to constraining emissions inventories - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2016

Analysis of long-term observations of NOx and CO in megacities and application to constraining emissions inventories

Agnes Borbon

Résumé

Long-term atmospheric NOx/CO enhancement ratios in megacities provide evaluations of emission inventories. A fuel-based emission inventory approach that diverges from conventional bottom-up inventory methods explains 1970–2015 trends in NOx/CO enhancement ratios in Los Angeles. Combining this comparison with similar measurements in other U.S. cities demonstrates that motor vehicle emissions controls were largely responsible for U.S. urban NOx/CO trends in the past half century. Differing NOx/CO enhancement ratio trends in U.S. and European cities over the past 25 years highlights alternative strategies for mitigating transportation emissions, reflecting Europe's increased use of light-duty diesel vehicles and correspondingly slower decreases in NOx emissions compared to the U.S. A global inventory widely used by global chemistry models fails to capture these long-term trends and regional differences in U.S. and Europe megacity NOx/CO enhancement ratios, possibly contributing to these models' inability to accurately reproduce observed long-term changes in tropospheric ozone.
Fichier principal
Vignette du fichier
2016GL069894.pdf (627.7 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-01371221 , version 1 (19-07-2020)

Identifiants

Citer

Birgit Hassler, Brian C. Mcdonald, Gregory J. Frost, Agnes Borbon, David C. Carslaw, et al.. Analysis of long-term observations of NOx and CO in megacities and application to constraining emissions inventories. Geophysical Research Letters, 2016, 43 (18), pp.9920-9930. ⟨10.1002/2016GL069894⟩. ⟨insu-01371221⟩
385 Consultations
178 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More