Search Results - "Clair, M J"

Conversion of hydroperoxides to carbonyls in field and laboratory instrumentation: Observational bias in diagnosing pristine versus anthropogenically controlled atmospheric chemistry by Rivera-Rios, J. C., Nguyen, T. B., Crounse, J. D., Jud, W., St. Clair, J. M., Mikoviny, T., Gilman, J. B., Lerner, B. M., Kaiser, J. B., de Gouw, J., Wisthaler, A., Hansel, A., Wennberg, P. O., Seinfeld, J. H., Keutsch, F. N.

“…Atmospheric volatile organic compound (VOC) oxidation mechanisms under pristine (rural/remote) and urban (anthropogenically‐influenced) conditions follow…”
Get full text

Sources, seasonality, and trends of southeast US aerosol: an integrated analysis of surface, aircraft, and satellite observations with the GEOS-Chem chemical transport model by Kim, P. S, Jacob, D. J, Fisher, J. A, Travis, K, Yu, K, Zhu, L, Yantosca, R. M, Sulprizio, M. P, Jimenez, J. L, Campuzano-Jost, P, Froyd, K. D, Liao, J, Hair, J. W, Fenn, M. A, Butler, C. F, Wagner, N. L, Gordon, T. D, Welti, A, Wennberg, P. O, Crounse, J. D, St. Clair, J. M, Teng, A. P, Millet, D. B, Schwarz, J. P, Markovic, M. Z, Perring, A. E

“…We use an ensemble of surface (EPA CSN, IMPROVE, SEARCH, AERONET), aircraft (SEAC4RS), and satellite (MODIS, MISR) observations over the southeast US during…”
Get full text

Characterization of a real-time tracer for isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) from aerosol mass spectrometer measurements by Hu, W. W, Campuzano-Jost, P, Palm, B. B, Day, D. A, Ortega, A. M, Hayes, P. L, Krechmer, J. E, Chen, Q, Kuwata, M, Liu, Y. J, de Sá, S. S, McKinney, K, Martin, S. T, Hu, M, Budisulistiorini, S. H, Riva, M, Surratt, J. D, St. Clair, J. M, Isaacman-Van Wertz, G, Yee, L. D, Goldstein, A. H, Carbone, S, Brito, J, Artaxo, P, de Gouw, J. A, Koss, A, Wisthaler, A, Mikoviny, T, Karl, T, Kaser, L, Jud, W, Hansel, A, Docherty, K. S, Alexander, M. L, Robinson, N. H, Coe, H, Allan, J. D, Canagaratna, M. R, Paulot, F, Jimenez, J. L

“…Substantial amounts of secondary organic aerosol (SOA) can be formed from isoprene epoxydiols (IEPOX), which are oxidation products of isoprene mainly under…”
Get full text

Speciation of OH reactivity above the canopy of an isoprene-dominated forest by Kaiser, J, Skog, K. M, Baumann, K, Bertman, S. B, Brown, S. B, Brune, W. H, Crounse, J. D, de Gouw, J. A, Edgerton, E. S, Feiner, P. A, Goldstein, A. H, Koss, A, Misztal, P. K, Nguyen, T. B, Olson, K. F, St. Clair, J. M, Teng, A. P, Toma, S, Wennberg, P. O, Wild, R. J, Zhang, L, Keutsch, F. N

“…Measurements of OH reactivity, the inverse lifetime of the OH radical, can provide a top–down estimate of the total amount of reactive carbon in an air mass…”
Get full text

Chemistry of hydrogen oxide radicals (HO x ) in the Arctic troposphere in spring by Mao, J., Jacob, D. J., Evans, M. J., Olson, J. R., Ren, X., Brune, W. H., Clair, J. M. St, Crounse, J. D., Spencer, K. M., Beaver, M. R., Wennberg, P. O., Cubison, M. J., Jimenez, J. L., Fried, A., Weibring, P., Walega, J. G., Hall, S. R., Weinheimer, A. J., Cohen, R. C., Chen, G., Crawford, J. H., McNaughton, C., Clarke, A. D., Jaeglé, L., Fisher, J. A., Yantosca, R. M., Le Sager, P., Carouge, C.

“…We use observations from the April 2008 NASA ARCTAS aircraft campaign to the North American Arctic, interpreted with a global 3-D chemical transport model…”
Get full text

Hydroxy nitrate production in the OH-initiated oxidation of alkenes by Teng, A. P, Crounse, J. D, Lee, L, St. Clair, J. M, Cohen, R. C, Wennberg, P. O

“…Alkenes are oxidized rapidly in the atmosphere by addition of OH and subsequently O2 leading to the formation of β-hydroxy peroxy radicals. These peroxy…”
Get full text

Motor unit recruitment when neuromuscular electrical stimulation is applied over a nerve trunk compared with a muscle belly: triceps surae by BERGQUIST, A. J, CLAIR, J. M, COLLINS, D. F

“…Neuromuscular electrical stimulation (NMES) can be delivered over a nerve trunk or muscle belly and can generate contractions by activating motor (peripheral…”
Get full text

Quantifying sources and sinks of reactive gases in the lower atmosphere using airborne flux observations by Wolfe, G. M., Hanisco, T. F., Arkinson, H. L., Bui, T. P., Crounse, J. D., Dean-Day, J., Goldstein, A., Guenther, A., Hall, S. R., Huey, G., Jacob, D. J., Karl, T., Kim, P. S., Liu, X., Marvin, M. R., Mikoviny, T., Misztal, P. K., Nguyen, T. B., Peischl, J., Pollack, I., Ryerson, T., St. Clair, J. M., Teng, A., Travis, K. R., Ullmann, K., Wennberg, P. O., Wisthaler, A.

“…Atmospheric composition is governed by the interplay of emissions, chemistry, deposition, and transport. Substantial questions surround each of these…”
Get full text

Importance of biogenic precursors to the budget of organic nitrates: observations of multifunctional organic nitrates by CIMS and TD-LIF during BEARPEX 2009 by Beaver, M. R, Clair, J. M. St, Paulot, F, Spencer, K. M, Crounse, J. D, LaFranchi, B. W, Min, K. E, Pusede, S. E, Wooldridge, P. J, Schade, G. W, Park, C, Cohen, R. C, Wennberg, P. O

“…Alkyl and multifunctional organic nitrates, molecules of the chemical form RONO2, are products of chain terminating reactions in the tropospheric HOx and NOx…”
Get full text

On the temperature dependence of organic reactivity, nitrogen oxides, ozone production, and the impact of emission controls in San Joaquin Valley, California by Pusede, S. E, Gentner, D. R, Wooldridge, P. J, Browne, E. C, Rollins, A. W, Min, K.-E, Russell, A. R, Thomas, J, Zhang, L, Brune, W. H, Henry, S. B, DiGangi, J. P, Keutsch, F. N, Harrold, S. A, Thornton, J. A, Beaver, M. R, St. Clair, J. M, Wennberg, P. O, Sanders, J, Ren, X, VandenBoer, T. C, Markovic, M. Z, Guha, A, Weber, R, Goldstein, A. H, Cohen, R. C

“…The San Joaquin Valley (SJV) experiences some of the worst ozone air quality in the US, frequently exceeding the California 8 h standard of 70.4 ppb. To…”
Get full text

Nitrogen oxides and PAN in plumes from boreal fires during ARCTAS-B and their impact on ozone: an integrated analysis of aircraft and satellite observations by Alvarado, M. J., Logan, J. A., Mao, J., Apel, E., Riemer, D., Blake, D., Cohen, R. C., Min, K.-E., Perring, A. E., Browne, E. C., Wooldridge, P. J., Diskin, G. S., Sachse, G. W., Fuelberg, H., Sessions, W. R., Harrigan, D. L., Huey, G., Liao, J., Case-Hanks, A., Jimenez, J. L., Cubison, M. J., Vay, S. A., Weinheimer, A. J., Knapp, D. J., Montzka, D. D., Flocke, F. M., Pollack, I. B., Wennberg, P. O., Kurten, A., Crounse, J., Clair, J. M. St, Wisthaler, A., Mikoviny, T., Yantosca, R. M., Carouge, C. C., Le Sager, P.

“…We determine enhancement ratios for NOx, PAN, and other NOy species from boreal biomass burning using aircraft data obtained during the ARCTAS-B campaign and…”
Get full text

Overview of the Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT): mechanistic chamber studies on the oxidation of biogenic compounds by Nguyen, T. B, Crounse, J. D, Schwantes, R. H, Teng, A. P, Bates, K. H, Zhang, X, St. Clair, J. M, Brune, W. H, Tyndall, G. S, Keutsch, F. N, Seinfeld, J. H, Wennberg, P. O

“…The Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT) was a collaborative atmospheric chamber campaign that occurred during…”
Get full text

Convective transport and scavenging of peroxides by thunderstorms observed over the central U.S. during DC3 by Barth, M. C., Bela, M. M., Fried, A., Wennberg, P. O., Crounse, J. D., St. Clair, J. M., Blake, N. J., Blake, D. R., Homeyer, C. R., Brune, W. H., Zhang, L., Mao, J., Ren, X., Ryerson, T. B., Pollack, I. B., Peischl, J., Cohen, R. C., Nault, B. A., Huey, L. G., Liu, X., Cantrell, C. A.

“…One of the objectives of the Deep Convective Clouds and Chemistry (DC3) field experiment was to determine the scavenging of soluble trace gases by…”
Get full text

Influence of convection on the water isotopic composition of the tropical tropopause layer and tropical stratosphere by Sayres, D. S., Pfister, L., Hanisco, T. F., Moyer, E. J., Smith, J. B., St. Clair, J. M., O'Brien, A. S., Witinski, M. F., Legg, M., Anderson, J. G.

“…We present the first in situ measurements of HDO across the tropical tropopause, obtained by the integrated cavity output spectroscopy (ICOS) and Hoxotope…”
Get full text

Quantification of hydroxyacetone and glycolaldehyde using chemical ionization mass spectrometry by St. Clair, J. M, Spencer, K. M, Beaver, M. R, Crounse, J. D, Paulot, F, Wennberg, P. O

“…Chemical ionization mass spectrometry (CIMS) enables online, rapid, in situ detection and quantification of hydroxyacetone and glycolaldehyde. Two different…”
Get full text

Emissions of organic carbon and methane from petroleum and dairy operations in California's San Joaquin Valley by Gentner, D. R, Ford, T. B, Guha, A, Boulanger, K, Brioude, J, Angevine, W. M, de Gouw, J. A, Warneke, C, Gilman, J. B, Ryerson, T. B, Peischl, J, Meinardi, S, Blake, D. R, Atlas, E, Lonneman, W. A, Kleindienst, T. E, Beaver, M. R, Clair, J. M. St, Wennberg, P. O, VandenBoer, T. C, Markovic, M. Z, Murphy, J. G, Harley, R. A, Goldstein, A. H

“…Petroleum and dairy operations are prominent sources of gas-phase organic compounds in California's San Joaquin Valley. It is essential to understand the…”
Get full text

Design considerations in high-sensitivity off-axis integrated cavity output spectroscopy by Moyer, E.J., Sayres, D.S., Engel, G.S., St. Clair, J.M., Keutsch, F.N., Allen, N.T., Kroll, J.H., Anderson, J.G.

“…Off-axis integrated cavity output spectroscopy (OA-ICOS) has generated much interest because it potentially allows highly sensitive field measurements with…”
Get full text

Validation of the Harvard Lyman-? in situ water vapor instrument: Implications for the mechanisms that control stratospheric water vapor by Weinstock, E M, Smith, J B, Sayres, D S, Pittman, J V, Spackman, J R, Hintsa, E J, Hanisco, T F, Moyer, E J, St. Clair, J M, Sargent, M R, Anderson, J G

“…Building on previously published details of the laboratory calibrations of the Harvard Lyman- photofragment fluorescence hygrometer (HWV) on the NASA ER-2 and…”
Get full text

Neuromuscular electrical stimulation has a global effect on corticospinal excitability for leg muscles and a focused effect for hand muscles by Mang, C. S., Clair, J. M., Collins, D. F.

“…The afferent volley generated during neuromuscular electrical stimulation (NMES) can increase the excitability of human corticospinal (CS) pathways to muscles…”
Get full text

Exploring Oxidation in the Remote Free Troposphere: Insights From Atmospheric Tomography (ATom) by Brune, W. H., Miller, D. O., Thames, A. B., Allen, H. M., Apel, E. C., Blake, D. R., Bui, T. P., Commane, R., Crounse, J. D., Daube, B. C., Diskin, G. S., DiGangi, J. P., Elkins, J. W., Hall, S. R., Hanisco, T. F., Hannun, R. A., Hintsa, E. J., Hornbrook, R. S., Kim, M. J., McKain, K., Moore, F. L., Neuman, J. A., Nicely, J. M., Peischl, J., Ryerson, T. B., Clair, J. M. St, Sweeney, C., Teng, A. P., Thompson, C., Ullmann, K., Veres, P. R., Wennberg, P. O., Wolfe, G. M.

“…Earth's atmosphere oxidizes the greenhouse gas methane and other gases, thus determining their lifetimes and oxidation products. Much of this oxidation occurs…”
Get full text