Diurnal and seasonal trends in nitrogen oxides

Observations of the diurnal and seasonal trends in nitrogen oxides in the western Sierra Nevada J. G. Murphy, D. A. Day, P. A. Cleary, P. J. Wooldridge, and R. C. Cohen Department of Chemistry, University of California, Berkeley, USA now at: School of Environmental Sciences, University of East Anglia, Norwich, UK now at: Department of Land, Air, and Water Resources, University of California, Davis, USA now at: Department of Chemistry, University of Pennsylvania, Philadelphia, USA Received: 6 February 2006 – Accepted: 9 March 2006 – Published: 7 June 2006 Correspondence to: R. C. Cohen ([email protected])