A space-based, high-resolution view of notable changes in urban NOx pollution around the world (2005–2014)

Bryan N. Duncan, Lok N. Lamsal, Anne Mee Thompson, Yasuko Yoshida, Zifeng Lu, David G. Streets, Margaret M. Hurwitz, Kenneth E. Pickering

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

Nitrogen oxides (NOx=NO+NO2) are produced during combustion processes and, thus may serve as a proxy for fossil fuel-based energy usage and coemitted greenhouse gases and other pollutants. We use high-resolution nitrogen dioxide (NO2) data from the Ozone Monitoring Instrument (OMI) to analyze changes in urban NO2 levels around the world from 2005 to 2014, finding complex heterogeneity in the changes. We discuss several potential factors that seem to determine these NOx changes. First, environmental regulations resulted in large decreases. The only large increases in the United States may be associated with three areas of intensive energy activity. Second, elevated NO2 levels were observed over many Asian, tropical, and subtropical cities that experienced rapid economic growth. Two of the largest increases occurred over recently expanded petrochemical complexes in Jamnagar (India) and Daesan (Korea). Third, pollution transport from China possibly influenced the Republic of Korea and Japan, diminishing the impact of local pollution controls. However, in China, there were large decreases over Beijing, Shanghai, and the Pearl River Delta, which were likely associated with local emission control efforts. Fourth, civil unrest and its effect on energy usagemay have resulted in lower NO2 levels in Libya, Iraq, and Syria. Fifth, spatial heterogeneity within several megacities may reflect mixed efforts to cope with air quality degradation. We also show the potential of high-resolution data for identifying NOx emission sources in regions with a complex mix of sources. Intensive monitoring of the world's tropical/subtropical megacities will remain a priority, as their populations and emissions of pollutants and greenhouse gases are expected to increase significantly.

Original languageEnglish (US)
Pages (from-to)976-996
Number of pages21
JournalJournal of Geophysical Research
Volume121
Issue number2
DOIs
StatePublished - Jan 27 2016

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urban pollution
nitrogen dioxide
pollution
Greenhouse gases
Pollution
megacity
greenhouses
Nitrogen Oxides
Nitrogen Dioxide
contaminants
Environmental regulations
Monitoring
Pollution control
Ozone
China
high resolution
Emission control
greenhouse gas
pollution transport
Libya

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Duncan, B. N., Lamsal, L. N., Thompson, A. M., Yoshida, Y., Lu, Z., Streets, D. G., ... Pickering, K. E. (2016). A space-based, high-resolution view of notable changes in urban NOx pollution around the world (2005–2014). Journal of Geophysical Research, 121(2), 976-996. https://doi.org/10.1002/2015JD024121
Duncan, Bryan N. ; Lamsal, Lok N. ; Thompson, Anne Mee ; Yoshida, Yasuko ; Lu, Zifeng ; Streets, David G. ; Hurwitz, Margaret M. ; Pickering, Kenneth E. / A space-based, high-resolution view of notable changes in urban NOx pollution around the world (2005–2014). In: Journal of Geophysical Research. 2016 ; Vol. 121, No. 2. pp. 976-996.
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Duncan, BN, Lamsal, LN, Thompson, AM, Yoshida, Y, Lu, Z, Streets, DG, Hurwitz, MM & Pickering, KE 2016, 'A space-based, high-resolution view of notable changes in urban NOx pollution around the world (2005–2014)', Journal of Geophysical Research, vol. 121, no. 2, pp. 976-996. https://doi.org/10.1002/2015JD024121

A space-based, high-resolution view of notable changes in urban NOx pollution around the world (2005–2014). / Duncan, Bryan N.; Lamsal, Lok N.; Thompson, Anne Mee; Yoshida, Yasuko; Lu, Zifeng; Streets, David G.; Hurwitz, Margaret M.; Pickering, Kenneth E.

In: Journal of Geophysical Research, Vol. 121, No. 2, 27.01.2016, p. 976-996.

Research output: Contribution to journalArticle

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T1 - A space-based, high-resolution view of notable changes in urban NOx pollution around the world (2005–2014)

AU - Duncan, Bryan N.

AU - Lamsal, Lok N.

AU - Thompson, Anne Mee

AU - Yoshida, Yasuko

AU - Lu, Zifeng

AU - Streets, David G.

AU - Hurwitz, Margaret M.

AU - Pickering, Kenneth E.

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