Revisiting the evidence of increasing springtime ozone mixing ratios in the free troposphere over western North America M Lin

Horowitz, L., O. Cooper, D. Tarasick, S. Conley, L. Iraci, B. Johnson, T. Leblanc, I. Petropavlovskikh, and E.L. Yates (2015), Revisiting the evidence of increasing springtime ozone mixing ratios in the free troposphere over western North America M Lin, Geophys. Res. Lett., 42, 8719-8728.