Search Results - "Herndon, S"

An Aerosol Chemical Speciation Monitor (ACSM) for Routine Monitoring of the Composition and Mass Concentrations of Ambient Aerosol by Ng, N. L., Herndon, S. C., Trimborn, A., Canagaratna, M. R., Croteau, P. L., Onasch, T. B., Sueper, D., Worsnop, D. R., Zhang, Q., Sun, Y. L., Jayne, J. T.

“…We present a new instrument, the Aerosol Chemical Speciation Monitor (ACSM), which routinely characterizes and monitors the mass and chemical composition of…”
Get full text

Reductions in aircraft particulate emissions due to the use of Fischer–Tropsch fuels by Beyersdorf, A. J, Timko, M. T, Ziemba, L. D, Bulzan, D, Corporan, E, Herndon, S. C, Howard, R, Miake-Lye, R, Thornhill, K. L, Winstead, E, Wey, C, Yu, Z, Anderson, B. E

“…The use of alternative fuels for aviation is likely to increase due to concerns over fuel security, price stability, and the sustainability of fuel sources…”
Get full text

Primary and secondary sources of formaldehyde in urban atmospheres: Houston Texas region by Parrish, D. D, Ryerson, T. B, Mellqvist, J, Johansson, J, Fried, A, Richter, D, Walega, J. G, Washenfelder, R. A, de Gouw, J. A, Peischl, J, Aikin, K. C, McKeen, S. A, Frost, G. J, Fehsenfeld, F. C, Herndon, S. C

“…We evaluate the rates of secondary production and primary emission of formaldehyde (CH2O) from petrochemical industrial facilities and on-road vehicles in the…”
Get full text

An overview of the MILAGRO 2006 Campaign: Mexico City emissions and their transport and transformation by Molina, L. T., Madronich, S., Gaffney, J. S., Apel, E., de Foy, B., Fast, J., Ferrare, R., Herndon, S., Jimenez, J. L., Lamb, B., Osornio-Vargas, A. R., Russell, P., Schauer, J. J., Stevens, P. S., Volkamer, R., Zavala, M.

“…MILAGRO (Megacity Initiative: Local And Global Research Observations) is an international collaborative project to examine the behavior and the export of…”
Get full text

Characterization of particulate matter emissions from on-road gasoline and diesel vehicles using a soot particle aerosol mass spectrometer by Dallmann, T. R, Onasch, T. B, Kirchstetter, T. W, Worton, D. R, Fortner, E. C, Herndon, S. C, Wood, E. C, Franklin, J. P, Worsnop, D. R, Goldstein, A. H, Harley, R. A

“…Particulate matter (PM) emissions were measured in July 2010 from on-road motor vehicles driving through a highway tunnel in the San Francisco Bay area. A soot…”
Get full text

Characterization of submicron particles influenced by mixed biogenic and anthropogenic emissions using high-resolution aerosol mass spectrometry: results from CARES by Setyan, A, Zhang, Q, Merkel, M, Knighton, W. B, Sun, Y, Song, C, Shilling, J. E, Onasch, T. B, Herndon, S. C, Worsnop, D. R, Fast, J. D, Zaveri, R. A, Berg, L. K, Wiedensohler, A, Flowers, B. A, Dubey, M. K, Subramanian, R

“…An Aerodyne high resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) was deployed during the Carbonaceous Aerosols and Radiative Effects Study…”
Get full text

Measurements of volatile organic compounds at a suburban ground site (T1) in Mexico City during the MILAGRO 2006 campaign: measurement comparison, emission ratios, and source attribution by Bon, D. M., Ulbrich, I. M., de Gouw, J. A., Warneke, C., Kuster, W. C., Alexander, M. L., Baker, A., Beyersdorf, A. J., Blake, D., Fall, R., Jimenez, J. L., Herndon, S. C., Huey, L. G., Knighton, W. B., Ortega, J., Springston, S., Vargas, O.

“…Volatile organic compound (VOC) mixing ratios were measured with two different instruments at the T1 ground site in Mexico City during the Megacity Initiative:…”
Get full text

Measurements of methane emissions from natural gas gathering facilities and processing plants: measurement methods by Roscioli, J. R, Yacovitch, T. I, Floerchinger, C, Mitchell, A. L, Tkacik, D. S, Subramanian, R, Martinez, D. M, Vaughn, T. L, Williams, L, Zimmerle, D, Robinson, A. L, Herndon, S. C, Marchese, A. J

“…Increased natural gas production in recent years has spurred intense interest in methane (CH4) emissions associated with its production, gathering, processing,…”
Get full text

Revisiting global fossil fuel and biofuel emissions of ethane by Tzompa‐Sosa, Z. A., Mahieu, E., Franco, B., Keller, C. A., Turner, A. J., Helmig, D., Fried, A., Richter, D., Weibring, P., Walega, J., Yacovitch, T. I., Herndon, S. C., Blake, D. R., Hase, F., Hannigan, J. W., Conway, S., Strong, K., Schneider, M., Fischer, E. V.

“…Recent measurements over the Northern Hemisphere indicate that the long‐term decline in the atmospheric burden of ethane (C2H6) has ended and the abundance…”
Get full text

New Approaches to Measuring Sticky Molecules: Improvement of Instrumental Response Times Using Active Passivation by Roscioli, J. R, Zahniser, M. S, Nelson, D. D, Herndon, S. C, Kolb, C. E

“…A novel method has been developed to improve sampling system response times for nominally “sticky” molecules such as HNO3 and NH3. The method reported here…”
Get full text

A case study into the measurement of ship emissions from plume intercepts of the NOAA ship Miller Freeman by Cappa, C. D, Williams, E. J, Lack, D. A, Buffaloe, G. M, Coffman, D, Hayden, K. L, Herndon, S. C, Lerner, B. M, Li, S.-M, Massoli, P, McLaren, R, Nuaaman, I, Onasch, T. B, Quinn, P. K

“…Emissions factors (EFs) for gas and sub-micron particle-phase species were measured in intercepted plumes as a function of vessel speed from an underway…”
Get full text

Short-term methane emissions from 2 dairy farms in California estimated by different measurement techniques and US Environmental Protection Agency inventory methodology: A case study by Arndt, C, Leytem, A B, Hristov, A N, Zavala-Araiza, D, Cativiela, J P, Conley, S, Daube, C, Faloona, I, Herndon, S C

“…Reported estimates of CH emissions from ruminants and manure management are up to 2 times higher in atmospheric top-down calculations than in bottom-up (BU)…”
Get more information

Atmospheric Measurements of the Physical Evolution of Aircraft Exhaust Plumes by Timko, M. T, Fortner, E, Franklin, J, Yu, Z, Wong, H. -W, Onasch, T. B, Miake-Lye, R. C, Herndon, S. C

“…Drawing from a series of field measurement activities including the Alternative Aviation Fuels Experiments (AAFEX1 and AAFEX2), we present experimental…”
Get full text

Recent progress in laser-based trace gas instruments: performance and noise analysis by McManus, J. B., Zahniser, M. S., Nelson, D. D., Shorter, J. H., Herndon, S. C., Jervis, D., Agnese, M., McGovern, R., Yacovitch, T. I., Roscioli, J. R.

“…We review our recent results in development of high-precision laser spectroscopic instrumentation using mid-infrared quantum cascade lasers, interband cascade…”
Get full text

Emissions of NOx, SO2, CO, and HCHO from commercial marine shipping during Texas Air Quality Study (TexAQS) 2006 by Williams, E. J., Lerner, B. M., Murphy, P. C., Herndon, S. C., Zahniser, M. S.

“…We report measurements of NOx, SO2, CO, and HCHO mass‐based emission factors from more than 200 commercial vessel encounters in the Gulf of Mexico and the…”
Get full text

Evaluation of nitrogen dioxide chemiluminescence monitors in a polluted urban environment by Dunlea, E. J., Herndon, S. C., Nelson, D. D., Volkamer, R. M., San Martini, F., Sheehy, P. M., Zahniser, M. S., Shorter, J. H., Wormhoudt, J. C., Lamb, B. K., Allwine, E. J., Gaffney, J. S., Marley, N. A., Grutter, M., Marquez, C., Blanco, S., Cardenas, B., Retama, A., Ramos Villegas, C. R., Kolb, C. E., Molina, L. T., Molina, M. J.

“…Data from a recent field campaign in Mexico City are used to evaluate the performance of the EPA Federal Reference Method for monitoring the ambient…”
Get full text

Quantifying Methane and Ethane Emissions to the Atmosphere From Central and Western U.S. Oil and Natural Gas Production Regions by Peischl, J., Eilerman, S. J., Neuman, J. A., Aikin, K. C., Gouw, J., Gilman, J. B., Herndon, S. C., Nadkarni, R., Trainer, M., Warneke, C., Ryerson, T. B.

“…We present atmospheric measurements of methane (CH4) and ethane (C2H6) taken aboard a National Oceanic and Atmospheric Administration WP‐3D research aircraft…”
Get full text

Wintertime aerosol chemical composition, volatility, and spatial variability in the greater London area by L Xu, Williams, L R, Young, D E, Allan, J D, Coe, H, Massoli, P, tner, E, Chhabra, P, Herndon, S, Brooks, W A, Jayne, J T, Worsnop, D R, Aiken, A C, Liu, S, Gorkowski, K, Dubey, M K, Fleming, Z L, Visser, S, Prévôt, A S H, Ng, N L

“…The composition of PM1 (particulate matter with diameter less than 1 µm) in the greater London area was characterized during the Clean Air for London…”
Get full text

Kerb and urban increment of highly time-resolved trace elements in PM10, PM2.5 and PM1.0 winter aerosol in London during ClearfLo 2012 by Visser, S, Slowik, J G, Furger, M, Zotter, P, Bukowiecki, N, Dressler, R, Flechsig, U, Appel, K, Green, D C, Tremper, A H

“…Ambient concentrations of trace elements with 2 h time resolution were measured in PM10-2.5, PM2.5-1.0 and PM1.0-0.3 size ranges at kerbside, urban background…”
Get full text

Distribution, magnitudes, reactivities, ratios and diurnal patterns of volatile organic compounds in the Valley of Mexico during the MCMA 2002 & 2003 field campaigns by Velasco, E., Lamb, B., Westberg, H., Allwine, E., Sosa, G., Arriaga-Colina, J. L., Jobson, B. T., Alexander, M. L., Prazeller, P., Knighton, W. B., Rogers, T. M., Grutter, M., Herndon, S. C., Kolb, C. E., Zavala, M., de Foy, B., Volkamer, R., Molina, L. T., Molina, M. J.

“…A wide array of volatile organic compound (VOC) measurements was conducted in the Valley of Mexico during the MCMA-2002 and 2003 field campaigns. Study sites…”
Get full text