Articles | Volume 20, issue 1
Research article
07 Jan 2020
Research article |  | 07 Jan 2020

The changing role of organic nitrates in the removal and transport of NOx

Paul S. Romer Present, Azimeh Zare, and Ronald C. Cohen

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Cited articles

ARCTAS-B Science Team: ARCTAS-B DC-8 aircraft data, NASA, available at: (last access: 13 July 2018), 2011. a, b
BEARPEX 07 Science Team: BEARPEX 2007 field campaign data,, 2007. a, b
BEARPEX 09 Science Team: BEARPEX 2009 field campaign data,, 2009. a, b
Brown, S. S., Dubé, W. P., Fuchs, H., Ryerson, T. B., Wollny, A. G., Brock, C. A., Bahreini, R., Middlebrook, A. M., Neuman, J. A., Atlas, E., Roberts, J. M., Osthoff, H. D., Trainer, M., Fehsenfeld, F. C., and Ravishankara, A. R.: Reactive uptake coefficients for N2O5 determined from aircraft measurements during the Second Texas Air Quality Study: Comparison to current model parameterizations, J. Geophys. Res., 114, D00F10,, 2009. a
Browne, E. C. and Cohen, R. C.: Effects of biogenic nitrate chemistry on the NOx lifetime in remote continental regions, Atmos. Chem. Phys., 12, 11917–11932,, 2012. a, b
Short summary
The chemistry of nitrogen oxides (NOx) affects both air quality and climate through its role in the production of ozone and secondary aerosols. We find that recent changes in emissions have caused a significant shift in the chemical loss of NOx away from direct production of HNO3 and towards production of organic nitrates. This shift is leading to a flatter distribution of NOx across the United States and helping transform air pollution from a local issue into a broader regional concern.
Final-revised paper