Impact of the 2008 Global Recession on air quality over the United States: Implications for surface ozone levels from changes in NOx emissions

Tong, Daniel; Pan, Li; Chen, Weiwei; Lamsal, Lok; Lee, Pius; Tang, Youhua; Kim, Hyuncheol; Kondragunta, Shobha; Stajner, Ivanka

doi:10.1002/2016gl069885

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Impact of the 2008 Global Recession on air quality over the United States: Implications for surface ozone levels from changes in NOx emissions

2016
By Tong, Daniel ; Pan, Li ; Chen, Weiwei ; ...
Source: Geophysical Research Letters, 43(17), 9280-9288.

[PDF-837.63 KB]

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Journal Title:

Journal of Atmospheric and Oceanic Technology
Personal Author:

Tong, Daniel ; Pan, Li ; Chen, Weiwei ; Lamsal, Lok ; Lee, Pius ; ... More +

Tong, Daniel ; Pan, Li ; Chen, Weiwei ; Lamsal, Lok ; Lee, Pius ; Tang, Youhua ; Kim, Hyuncheol ; Kondragunta, Shobha ; Stajner, Ivanka Less -
NOAA Program & Office:

CICS (Cooperative Institute for Climate and Satellites) ; ARL (Air Resources Laboratory) ; OAR (Oceanic and Atmospheric Research)

CICS (Cooperative Institute for Climate and Satellites) ; ARL (Air Resources Laboratory) ; OAR (Oceanic and Atmospheric Research) Less -
Description:

Satellite and ground observations detected large variability in nitrogen oxides (NOx) during the 2008 economic recession, but the impact of the recession on air quality has not been quantified. This study combines observed NOx trends and a regional chemical transport model to quantify the impact of the recession on surface ozone (O-3) levels over the continental United States. The impact is quantified by simulating O-3 concentrations under two emission scenarios: business-as-usual (BAU) and recession. In the BAU case, the emission projection from the Cross-State Air Pollution Rule is used to estimate the would-be NOx emission level in 2011. In the recession case, the actual NO2 trends observed from Air Quality System ground monitors and the Ozone Monitoring Instrument on the Aura satellite are used to obtain realistic changes in NOx emissions. The model prediction with the recession effect agrees better with ground O-3 observations over time and space than the prediction with the BAU emission. The results show that the recession caused a 1-2ppbv decrease in surface O-3 concentration over the eastern United States, a slight increase (0.5-1ppbv) over the Rocky Mountain region, and mixed changes in the Pacific West. The gain in air quality benefits during the recession, however, could be quickly offset by the much slower emission reduction rate during the post-recession period.
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Geophysical Research Letters, 43(17), 9280-9288.
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https://doi.org/10.1002/2016gl069885
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Journal Article
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urn:sha256:22878d82fc7a5068c3c06e4257f3250195339f1446f4651bd56d1ffdcab6189a
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Impact of the 2008 Global Recession on air quality over the United States: Implications for surface ozone levels from changes in NOx emissions

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