Journal articles
Analysis of long-term observations of NOx and CO in megacities and application to constraining emissions inventories
Abstract : 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.
Cited literature [68 references]
https://hal-insu.archives-ouvertes.fr/insu-01371221
Contributor : Catherine Cardon <>
Submitted on : Sunday, July 19, 2020 - 1:11:52 PM
Last modification on : Friday, October 9, 2020 - 9:51:43 AM
Contributor : Catherine Cardon <>
Submitted on : Sunday, July 19, 2020 - 1:11:52 PM
Last modification on : Friday, October 9, 2020 - 9:51:43 AM
File
2016GL069894.pdf
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