Zobrazeno 1 - 10
of 24
pro vyhledávání: '"W. P. Dube"'
Autor:
E. E. McDuffie, C. C. Womack, D. L. Fibiger, W. P. Dube, A. Franchin, A. M. Middlebrook, L. Goldberger, B. H. Lee, J. A. Thornton, A. Moravek, J. G. Murphy, M. Baasandorj, S. S. Brown
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 9287-9308 (2019)
Mountain basins in Northern Utah, including the Salt Lake Valley (SLV), suffer from wintertime air pollution events associated with stagnant atmospheric conditions. During these events, fine particulate matter concentrations (PM2.5) can exceed nation
Externí odkaz:
https://doaj.org/article/bc13f0855bc449b4a8c73c23aedda5c0
Autor:
A. Franchin, D. L. Fibiger, L. Goldberger, E. E. McDuffie, A. Moravek, C. C. Womack, E. T. Crosman, K. S. Docherty, W. P. Dube, S. W. Hoch, B. H. Lee, R. Long, J. G. Murphy, J. A. Thornton, S. S. Brown, M. Baasandorj, A. M. Middlebrook
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 17259-17276 (2018)
Airborne and ground-based measurements of aerosol concentrations, chemical composition, and gas-phase precursors were obtained in three valleys in northern Utah (USA). The measurements were part of the Utah Winter Fine Particulate Study (UWFPS) th
Externí odkaz:
https://doaj.org/article/41cb310f8c5542218641af9ad5446c34
Autor:
C. C. Womack, J. A. Neuman, P. R. Veres, S. J. Eilerman, C. A. Brock, Z. C. J. Decker, K. J. Zarzana, W. P. Dube, R. J. Wild, P. J. Wooldridge, R. C. Cohen, S. S. Brown
Publikováno v:
Atmospheric Measurement Techniques, Vol 10, Iss 5, Pp 1911-1926 (2017)
The sum of all reactive nitrogen species (NOy) includes NOx (NO2 + NO) and all of its oxidized forms, and the accurate detection of NOy is critical to understanding atmospheric nitrogen chemistry. Thermal dissociation (TD) inlets, which convert NOy t
Externí odkaz:
https://doaj.org/article/2acc2594ac8a4094ba096ed7e9d35ce1
Autor:
C. Warneke, M. Trainer, J. A. de Gouw, D. D. Parrish, D. W. Fahey, A. R. Ravishankara, A. M. Middlebrook, C. A. Brock, J. M. Roberts, S. S. Brown, J. A. Neuman, B. M. Lerner, D. Lack, D. Law, G. Hübler, I. Pollack, S. Sjostedt, T. B. Ryerson, J. B. Gilman, J. Liao, J. Holloway, J. Peischl, J. B. Nowak, K. C. Aikin, K.-E. Min, R. A. Washenfelder, M. G. Graus, M. Richardson, M. Z. Markovic, N. L. Wagner, A. Welti, P. R. Veres, P. Edwards, J. P. Schwarz, T. Gordon, W. P. Dube, S. A. McKeen, J. Brioude, R. Ahmadov, A. Bougiatioti, J. J. Lin, A. Nenes, G. M. Wolfe, T. F. Hanisco, B. H. Lee, F. D. Lopez-Hilfiker, J. A. Thornton, F. N. Keutsch, J. Kaiser, J. Mao, C. D. Hatch
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 7, Pp 3063-3093 (2016)
Natural emissions of ozone-and-aerosol-precursor gases such as isoprene and monoterpenes are high in the southeastern US. In addition, anthropogenic emissions are significant in the southeastern US and summertime photochemistry is rapid. The NOAA-led
Externí odkaz:
https://doaj.org/article/cd24a9b0be4a462a890cae3a2c277d5d
Autor:
K. J. Zarzana, V. Selimovic, A. R. Koss, K. Sekimoto, M. M. Coggon, B. Yuan, W. P. Dubé, R. J. Yokelson, C. Warneke, J. A. de Gouw, J. M. Roberts, S. S. Brown
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 15451-15470 (2018)
We report the emissions of glyoxal and methylglyoxal from the open burning of biomass during the NOAA-led 2016 FIREX intensive at the Fire Sciences Laboratory in Missoula, MT. Both compounds were measured using cavity-enhanced spectroscopy, which i
Externí odkaz:
https://doaj.org/article/f562246082ff4322a88b61ce3a2e1983
Autor:
J. L. Fry, S. S. Brown, A. M. Middlebrook, P. M. Edwards, P. Campuzano-Jost, D. A. Day, J. L. Jimenez, H. M. Allen, T. B. Ryerson, I. Pollack, M. Graus, C. Warneke, J. A. de Gouw, C. A. Brock, J. Gilman, B. M. Lerner, W. P. Dubé, J. Liao, A. Welti
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 11663-11682 (2018)
Nighttime reaction of nitrate radicals (NO3) with biogenic volatile organic compounds (BVOC) has been proposed as a potentially important but also highly uncertain source of secondary organic aerosol (SOA). The southeastern United States has both
Externí odkaz:
https://doaj.org/article/8b00b5f391784807be382acac7947c3b
Autor:
K.-E. Min, R. A. Washenfelder, W. P. Dubé, A. O. Langford, P. M. Edwards, K. J. Zarzana, J. Stutz, K. Lu, F. Rohrer, Y. Zhang, S. S. Brown
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 2, Pp 423-440 (2016)
We describe a two-channel broadband cavity enhanced absorption spectrometer (BBCEAS) for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH3COCHO), nitrous acid (HONO), nitrogen dioxide (NO2), and water (H2O). The instrument spans 361–389
Externí odkaz:
https://doaj.org/article/9bba20289f924b0983f09d351f138be5
Autor:
R. J. Wild, P. M. Edwards, T. S. Bates, R. C. Cohen, J. A. de Gouw, W. P. Dubé, J. B. Gilman, J. Holloway, J. Kercher, A. R. Koss, L. Lee, B. M. Lerner, R. McLaren, P. K. Quinn, J. M. Roberts, J. Stutz, J. A. Thornton, P. R. Veres, C. Warneke, E. Williams, C. J. Young, B. Yuan, K. J. Zarzana, S. S. Brown
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 573-583 (2016)
High wintertime ozone levels have been observed in the Uintah Basin, Utah, a sparsely populated rural region with intensive oil and gas operations. The reactive nitrogen budget plays an important role in tropospheric ozone formation. Measurements
Externí odkaz:
https://doaj.org/article/62d5c3ed436c49df9f12794faf92cb8f
Publikováno v:
Review of Scientific Instruments. 60:261-264
To measure the critical current of superconductors, a high output current supply is required. In addition to high current capability, the supply should be designed to reduce ground loop problems, respond linearly to an input control signal, and minim
Autor:
B. Yuan, P. R. Veres, C. Warneke, J. M. Roberts, J. B. Gilman, A. Koss, P. M. Edwards, M. Graus, W. C. Kuster, S.-M. Li, R. J. Wild, S. S. Brown, W. P. Dubé, B. M. Lerner, E. J. Williams, J. E. Johnson, P. K. Quinn, T. S. Bates, B. Lefer, P. L. Hayes, J. L. Jimenez, R. J. Weber, R. Zamora, B. Ervens, D. B. Millet, B. Rappenglück, J. A. de Gouw
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 4, Pp 1975-1993 (2015)
Formic acid (HCOOH) is one of the most abundant carboxylic acids in the atmosphere. However, current photochemical models cannot fully explain observed concentrations and in particular secondary formation of formic acid across various environments. I
Externí odkaz:
https://doaj.org/article/ace1f35f1de043ce9e81cc7118a36470