Search Results - "LANZENDORF, E. J"

Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere by Wennberg, PO, Hanisco, TF, Jaegle, L, Jacob, DJ, Hintsa, EJ, Lanzendorf, EJ, Anderson, JG, Gao, R, Keim, ER, Donnelly, SG, Negro, LAD, Fahey, DW, McKeen, SA, Salawitch, RJ, Webster, CR, May, RD, Herman, RL, Proffitt, MH, Margitan, JJ, Atlas, EL, Schauffler, SM, Flocke, F, McElroy, CT, Bui, TP

“…The concentrations of the hydrogen radicals OH and HO2 in the middle and upper troposphere were measured simultaneously with those of NO, O3, CO, H2O, CH4,…”
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Observed OH and HO2 in the upper troposphere suggest a major source from convective injection of peroxides by Jaeglé, L., Jacob, D. J., Wennberg, P. O., Spivakovsky, C. M., Hanisco, T. F., Lanzendorf, E. J., Hintsa, E. J., Fahey, D. W., Keim, E. R., Proffitt, M. H., Atlas, E. L., Flocke, F., Schauffler, S., McElroy, C. T., Midwinter, C., Pfister, L., Wilson, J. C.

“…ER‐2 aircraft observations of OH and HO2 concentrations in the upper troposphere during the NASA/STRAT campaign are interpreted using a photochemical model…”
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Sources, Sinks, and the Distribution of OH in the Lower Stratosphere by Hanisco, T. F, Lanzendorf, E. J, Wennberg, P. O, Perkins, K. K, Stimpfle, R. M, Voss, P. B, Anderson, J. G, Cohen, R. C, Fahey, D. W, Gao, R. S, Hintsa, E. J, Salawitch, R. J, Margitan, J. J, McElroy, C. T, Midwinter, C

“…Extensive measurement campaigns by the NASA ER-2 research aircraft have obtained a nearly pole-to-pole database of the species that control HO x (OH + HO2)…”
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Twilight observations suggest unknown sources of HOx by Wennberg, P. O., Salawitch, R. J., Donaldson, D. J., Hanisco, T. F., Lanzendorf, E. J., Perkins, K. K., Lloyd, S. A., Vaida, V., Gao, R. S., Hintsa, E. J., Cohen, R. C., Swartz, W. H., Kusterer, T. L., Anderson, D. E.

“…Measurements of the concentrations of OH and HO2 (HOx) in the high‐latitude lower stratosphere imply the existence of unknown photolytic sources of HOx. The…”
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Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates by Cohen, R. C., Perkins, K. K., Koch, L. C., Stimpfle, R. M., Wennberg, P. O., Hanisco, T. F., Lanzendorf, E. J., Bonne, G. P., Voss, P. B., Salawitch, R. J., Del Negro, L. A., Wilson, J. C., McElroy, C. T., Bui, T. P.

“…In situ observations Of NO2, NO, NOy, ClONO2, OH, O3, aerosol surface area, spectrally resolved solar radiation, pressure and temperature obtained from the…”
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A comparison of observations and model simulations of NOx/NOy in the lower stratosphere by Gao, R. S., Fahey, D. W., Del Negro, L. A., Donnelly, S. G., Keim, E. R., Neuman, J. A., Teverovskaia, E., Wennberg, P. O., Hanisco, T. F., Lanzendorf, E. J., Proffitt, M. H., Margitan, J. J., Wilson, J. C., Elkins, J. W., Stimpfle, R. M., Cohen, R. C., McElroy, C. T., Bui, T. P., Salawitch, R. J., Brown, S. S., Ravishankara, A. R., Portmann, R. W., Ko, M. K. W., Weisenstein, D. K., Newman, P. A.

“…Extensive airborne measurements of the reactive nitrogen reservoir (NOy) and its component nitric oxide (NO) have been made in the lower stratosphere. Box…”
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Ozone destruction and production rates between spring and autumn in the Arctic stratosphere by Fahey, D. W., Gao, R. S., Del Negro, L. A., Keim, E. R., Kawa, S. R., Salawitch, R. J., Wennberg, P. O., Hanisco, T. F., Lanzendorf, E. J., Perkins, K. K., Lloyd, S. A., Swartz, W. H., Proffitt, M. H., Margitan, J. J., Wilson, J. C., Stimpfle, R. M., Cohen, R. C., McElroy, C. T., Webster, C. R., Loewenstein, M., Elkins, J. W., Bui, T. P.

“…In situ measurements of radical and long‐lived species were made in the lower Arctic stratosphere (18 to 20 km) between spring and early autumn in 1997. The…”
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Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO2]/[HCl] during POLARIS by Voss, P. B., Stimpfle, R. M., Cohen, R. C., Hanisco, T. F., Bonne, G. P., Perkins, K. K., Lanzendorf, E. J., Anderson, J. G., Salawitch, R. J.

“…We examine inorganic chlorine (Cly) partitioning in the summer lower stratosphere using in situ ER-2 aircraft observations made during the Photochemistry of…”
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Comparing atmospheric [HO2]/[OH] to modeled [HO2]/[OH]: Identifying discrepancies with reaction rates by Lanzendorf, E. J., Hanisco, T. F., Wennberg, P. O., Cohen, R. C., Stimpfle, R. M., Anderson, J. G.

“…Reactions that inter‐convert OH and HO2 are directly involved in the catalytic removal of O3 in the lower stratosphere and in the catalytic production of O3 in…”
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Influence of air mass histories on radical species during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission by Pierson, J. M., Kawa, S. R., Salawitch, R. J., Hanisco, T. F., Lanzendorf, E. J., Perkins, K. K., Gao, R. S.

“…The Goddard trajectory chemistry model was used with ER‐2 aircraft data to test our current knowledge of radical photochemistry during the Photochemistry of…”
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Hydrogen Radicals, Nitrogen Radicals, and the Production of O$_3$ in the Upper Troposphere by Wennberg, P. O., Hanisco, T. F., Jaeglé, L., Jacob, D. J., Hintsa, E. J., Lanzendorf, E. J., Anderson, J. G., R.-S. Gao, Keim, E. R., Donnelly, S. G., Del Negro, L. A., Fahey, D. W., McKeen, S. A., Salawitch, R. J., Webster, C. R., May, R. D., Herman, R. L., Proffitt, M. H., Margitan, J. J., Atlas, E. L., Schauffler, S. M., Flocke, F., McElroy, C. T., Bui, T. P.

“…The concentrations of the hydrogen radicals OH and HO$_2$ in the middle and upper troposphere were measured simultaneously with those of NO, O$_3$, CO, H$_2$O,…”
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NOy partitioning from measurements of nitrogen and hydrogen radicals in the upper troposphere by Keim, E. R., McKeen, S. A., Gao, R. S., Donnelly, S. G., Wamsley, R. C., Del Negro, L. A., Fahey, D. W., Hanisco, T. F., Lanzendorf, E. J., Proffitt, M. H., Margitan, J. J., Hintsa, E. J., Jaeglé, L., Webster, C. R., May, R. D., Scott, D. C., Salawitch, R. J., Wilson, J. C., McElroy, C. T., Atlas, E. L., Flocke, F., Bui, T. P.

“…Recent studies using NO, NOy, OH and HO2 (HOx) observations have postulated acetone and convection of peroxides as significant sources of HOx in the upper…”
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Comment on: "The measurement of tropospheric OH radicals by laser-induced fluorescence spectroscopy during the POPCORN Field Campaign" by Hofzumahaus et al. and "Intercomparison of tropospheric OH radical measurements by multiple folded long-path laser absorption and laser induced fluorescence" by Brauers et al by Lanzendorf, E. J., Hanisco, T. F., Donahue, N. M., Wennberg, P. O.

“…Calibration of laser induced fluorescence (LIF) instruments that measure OH is challenging because it is difficult to reliably introduce a known amount of this…”
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Effect of Incident Translational Energy and Surface Temperature on the Sticking Probability of F2 and O2 on Si(100)-2.times.1 and Si(111)-7.times.7 by Behringer, E. R, Flaum, H. C, Sullivan, D. J. D, Masson, D. P, Lanzendorf, E. J, Kummel, A. C

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Establishing the Dependence of [HO2]/[OH] on Temperature, Halogen Loading, O3, and NOx Based on in Situ Measurements from the NASA ER-2 by LANZENDORF, E. J., HANISCO, T. F., WENNBERG, P. O., COHEN, R. C., STIMPFLE, R. M., ANDERSON, J. G., GAO, R. S., MARGITAN, J. J., BUI, T. P.

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Photoinduced ejection of ballistic oxygen atoms from N2O adsorbed on Pt(111) by Masson, DP, Lanzendorf, EJ, Kummel, AC

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The NOx−HNO3 System in the Lower Stratosphere:  Insights from In Situ Measurements and Implications of the JHNO3−[OH] Relationship by PERKINS, K. K., HANISCO, T. F., COHEN, R. C., KOCH, L. C., STIMPFLE, R. M., VOSS, P. B., BONNE, G. P., LANZENDORF, E. J., ANDERSON, J. G., WENNBERG, P. O., GAO, R. S., DEL NEGRO, L. A., SALAWITCH, R. J., MCELROY, C. T., HINTSA, E. J., LOEWENSTEIN, M., BUI, T. P.

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Establishing the Dependence of [HO 2 ]/[OH] on Temperature, Halogen Loading, O 3 , and NO x Based on in Situ Measurements from the NASA ER-2 by Lanzendorf, E. J., Hanisco, T. F., Wennberg, P. O., Cohen, R. C., Stimpfle, R. M., Anderson, J. G., Gao, R. S., Margitan, J. J., Bui, T. P.

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Influence of air mass histories on radical species during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission by Pierson, J M, Kawa, S R, Salawitch, R J, Hanisco, T F, Lanzendorf, E J, Perkins, K K, Gao, R S

“…The Goddard trajectory chemistry model was used with ER-2 aircraft data to test our current knowledge of radical photochemistry during the Photo-chemistry of…”
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Quantitative constraints on the atmospheric chemistry of nitrogen oxides - An analysis along chemical coordinates by Cohen, R C, Perkins, K K, Koch, L C, Stimpfle, R M, Wennberg, P O, Hanisco, T F, Lanzendorf, E J, Bonne, G P, Voss, P B, Salawitch, R J

“…In situ observations of NO2, NO, NO(y), ClONO2, OH, O3, aerosol surface area, spectrally resolved solar radiation, pressure, and temperature obtained from the…”
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