Halogen species are extremely important in atmospheric chemistry, serving both as strong oxidants and as catalysts that drive the production and destruction of ozone. Recent field investigations have demonstrated that nitrogen oxides, common pollutants from combustion sources, are efficient at producing these halogens, particularly in the winter and during darkness. Little is known about this potentially important process.听听, based at the 麻豆影院 Atmospheric Observatory in Weld County, Colorado, provided vertically resolved measurements from a 300 m tower during winter. It will included measurements of the key halogen, nitrogen oxide, and aerosol species that define this atmospheric chemical cycle.
Selected Papers
Wagner, N.L., T.P. Riedel, C.J. Young, R. Bahreini, C.A. Brock, W.P. Dub茅, S. Kim, A.M. Middlebrook, F. 脰zt眉rk, J.M. Roberts, R. Russo, B. Sive, R. Swarthout, J.A. Thornton, T.C. VandenBoer, Y. Zhou, and S.S. Brown, N2O5 uptake coefficients and nocturnal NO2 removal rates determined from ambient wintertime measurements. J. Geophys. Res., 2013. 118(16): p. 9331-9350.听
Riedel, T.P., N.L. Wagner, W.P. Dub茅, A.M. Middlebrook, C.J. Young, F. 脰zt眉rk, R. Bahreini, T.C. VandenBoer, D.E. Wolfe, E.J. Williams, J.M. Roberts, S.S. Brown, and J.A. Thornton, Chlorine activation within urban and power plant plumes: vertically resolved ClNO2 and Cl2 measurements from a tall tower in a polluted continental setting. J. Geophys. Res., 2013. 118(15): p. 8702-8715.听
Brown, S.S., J.A. Thornton, W.C. Keene, A.A.P. Pszenny, B.C. Sive, W.P. Dub茅, N.L. Wagner, C.J. Young, T.P. Riedel, J.M. Roberts, T.C. VandenBoer, R. Bahreini, F. 脰zt眉rk, A.M. Middlebrook, S. Kim, G. H眉bler, and D.E. Wolfe, Nitrogen, Aerosol Composition and Halogens on a Tall Tower (NACHTT): Overview of a Wintertime Air Chemistry Field Study in the Front Range Urban Corridor of Colorado. J. Geophys. Res., 2013. 118: p. 8067-8085.听