Zobrazeno 1 - 10
of 163
pro vyhledávání: '"B. J. Williams"'
Autor:
A. J. Dang, N. M. Kreisberg, T. L. Cargill, J.-H. Chen, S. Hornitschek, R. Hutheesing, J. R. Turner, B. J. Williams
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 2067-2087 (2024)
Volatile organic compounds (VOCs) have diverse functionality, emission sources, and environmental fates. Speciated measurements of their spatiotemporal variability are thus key to understanding their impacts on air quality, health, and climate. Netwo
Externí odkaz:
https://doaj.org/article/0739cc8b129d49cdb73999f7976526c7
Autor:
S. Jeon, M. J. Walker, D. T. Sueper, D. A. Day, A. V. Handschy, J. L. Jimenez, B. J. Williams
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 6075-6095 (2023)
The Aerodyne Aerosol Mass Spectrometer (AMS) and Aerosol Chemical Speciation Monitor (ACSM) are the most widely applied tools for in situ chemical analysis of the non-refractory bulk composition of fine atmospheric particles. The mass spectra (MS) of
Externí odkaz:
https://doaj.org/article/fe33f05353884959ae6a9da2e518e426
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 1741-1756 (2018)
Oxidation flow reactors (OFRs) have been developed to achieve high degrees of oxidant exposures over relatively short space times (defined as the ratio of reactor volume to the volumetric flow rate). While, due to their increased use, attention ha
Externí odkaz:
https://doaj.org/article/1561cd84b0ba4130be622bb527fe948c
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 2199-2224 (2018)
The chemical complexity of biomass burning organic aerosol (BBOA) greatly increases with photochemical aging in the atmosphere, necessitating controlled laboratory studies to inform field observations. In these experiments, BBOA from American whit
Externí odkaz:
https://doaj.org/article/27528a3b880543e883fc53e6e221a769
Nitrate radicals and biogenic volatile organic compounds: oxidation, mechanisms, and organic aerosol
Autor:
N. L. Ng, S. S. Brown, A. T. Archibald, E. Atlas, R. C. Cohen, J. N. Crowley, D. A. Day, N. M. Donahue, J. L. Fry, H. Fuchs, R. J. Griffin, M. I. Guzman, H. Herrmann, A. Hodzic, Y. Iinuma, J. L. Jimenez, A. Kiendler-Scharr, B. H. Lee, D. J. Luecken, J. Mao, R. McLaren, A. Mutzel, H. D. Osthoff, B. Ouyang, B. Picquet-Varrault, U. Platt, H. O. T. Pye, Y. Rudich, R. H. Schwantes, M. Shiraiwa, J. Stutz, J. A. Thornton, A. Tilgner, B. J. Williams, R. A. Zaveri
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 3, Pp 2103-2162 (2017)
Oxidation of biogenic volatile organic compounds (BVOC) by the nitrate radical (NO3) represents one of the important interactions between anthropogenic emissions related to combustion and natural emissions from the biosphere. This interaction has bee
Externí odkaz:
https://doaj.org/article/b2f48a8ea31d4a8fbf584ebd20d2de88
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Pp 5637-5653 (2016)
We present a rapid method for apportioning the sources of atmospheric organic aerosol composition measured by gas chromatography–mass spectrometry methods. Here, we specifically apply this new analysis method to data acquired on a thermal desorp
Externí odkaz:
https://doaj.org/article/4848131fd71d4e5b8cff37522f2627fb
Autor:
B. J. Williams, Y. Zhang, X. Zuo, R. E. Martinez, M. J. Walker, N. M. Kreisberg, A. H. Goldstein, K. S. Docherty, J. L. Jimenez
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 4, Pp 1569-1586 (2016)
Atmospheric aerosol composition is often analyzed using thermal desorption techniques to evaporate samples and deliver organic or inorganic molecules to various designs of detectors for identification and quantification. The organic aerosol (OA) frac
Externí odkaz:
https://doaj.org/article/20d0b1c168ff457ea0c6655e712a5735
Autor:
D. B. Millet, M. Baasandorj, D. K. Farmer, J. A. Thornton, K. Baumann, P. Brophy, S. Chaliyakunnel, J. A. de Gouw, M. Graus, L. Hu, A. Koss, B. H. Lee, F. D. Lopez-Hilfiker, J. A. Neuman, F. Paulot, J. Peischl, I. B. Pollack, T. B. Ryerson, C. Warneke, B. J. Williams, J. Xu
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 11, Pp 6283-6304 (2015)
Formic acid (HCOOH) is one of the most abundant acids in the atmosphere, with an important influence on precipitation chemistry and acidity. Here we employ a chemical transport model (GEOS-Chem CTM) to interpret recent airborne and ground-based measu
Externí odkaz:
https://doaj.org/article/1c6312b67d7e41b18f888b845fe0a010
Publikováno v:
Atmospheric Measurement Techniques, Vol 8, Iss 3, Pp 1303-1321 (2015)
We present a detailed investigation of the factors governing the quantification of formic acid (FA), acetic acid (AA), and their relevant mass analogues by proton-transfer-reaction mass spectrometry (PTR-MS), assess the underlying fragmentation pathw
Externí odkaz:
https://doaj.org/article/87a343f03c604e728064a61e5b60e71c
Autor:
S. Decesari, J. Allan, C. Plass-Duelmer, B. J. Williams, M. Paglione, M. C. Facchini, C. O'Dowd, R. M. Harrison, J. K. Gietl, H. Coe, L. Giulianelli, G. P. Gobbi, C. Lanconelli, C. Carbone, D. Worsnop, A. T. Lambe, A. T. Ahern, F. Moretti, E. Tagliavini, T. Elste, S. Gilge, Y. Zhang, M. Dall'Osto
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 22, Pp 12109-12132 (2014)
The use of co-located multiple spectroscopic techniques can provide detailed information on the atmospheric processes regulating aerosol chemical composition and mixing state. So far, field campaigns heavily equipped with aerosol mass spectrometers h
Externí odkaz:
https://doaj.org/article/2682f2d9bd4b46dc812a1fbf8f946017