Zobrazeno 1 - 10
of 381
pro vyhledávání: '"P. S. Stevens"'
Autor:
B. Bottorff, M. M. Lew, Y. Woo, P. Rickly, M. D. Rollings, B. Deming, D. C. Anderson, E. Wood, H. D. Alwe, D. B. Millet, A. Weinheimer, G. Tyndall, J. Ortega, S. Dusanter, T. Leonardis, J. Flynn, M. Erickson, S. Alvarez, J. C. Rivera-Rios, J. D. Shutter, F. Keutsch, D. Helmig, W. Wang, H. M. Allen, J. H. Slade, P. B. Shepson, S. Bertman, P. S. Stevens
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 10287-10311 (2023)
The hydroxyl (OH), hydroperoxy (HO2), and organic peroxy (RO2) radicals play important roles in atmospheric chemistry. In the presence of nitrogen oxides (NOx), reactions between OH and volatile organic compounds (VOCs) can initiate a radical propaga
Externí odkaz:
https://doaj.org/article/f35d0abf1c7945e2af04205e550ee50d
Autor:
D. Wei, H. D. Alwe, D. B. Millet, B. Bottorff, M. Lew, P. S. Stevens, J. D. Shutter, J. L. Cox, F. N. Keutsch, Q. Shi, S. C. Kavassalis, J. G. Murphy, K. T. Vasquez, H. M. Allen, E. Praske, J. D. Crounse, P. O. Wennberg, P. B. Shepson, A. A. T. Bui, H. W. Wallace, R. J. Griffin, N. W. May, M. Connor, J. H. Slade, K. A. Pratt, E. C. Wood, M. Rollings, B. L. Deming, D. C. Anderson, A. L. Steiner
Publikováno v:
Geoscientific Model Development, Vol 14, Pp 6309-6329 (2021)
The FORCAsT (FORest Canopy Atmosphere Transfer) model version 1.0 is updated to FORCAsT 2.0 by implementing five major changes, including (1) a change to the operator splitting, separating chemistry from emission and dry deposition, which reduces the
Externí odkaz:
https://doaj.org/article/7ef1e45541fe4cd98818e53c0ab3fff4
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 6039-6056 (2021)
A new instrument for the measurement of atmospheric nitrous acid (HONO) and hydroxyl radicals (OH) has been developed using laser photofragmentation (LP) of HONO at 355 nm after expansion into a low-pressure cell, followed by resonant laser-induced f
Externí odkaz:
https://doaj.org/article/084da912d0f147aba6f6bf0b3f7cdbf6
Autor:
M. M. Lew, P. S. Rickly, B. P. Bottorff, E. Reidy, S. Sklaveniti, T. Léonardis, N. Locoge, S. Dusanter, S. Kundu, E. Wood, P. S. Stevens
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 9209-9230 (2020)
Reactions of the hydroxyl (OH) and peroxy (HO2 and RO2) radicals play a central role in the chemistry of the atmosphere. In addition to controlling the lifetimes of many trace gases important to issues of global climate change, OH radical reactions i
Externí odkaz:
https://doaj.org/article/ac388791959a429c96ee60985b87924b
Autor:
S. Kundu, B. L. Deming, M. M. Lew, B. P. Bottorff, P. Rickly, P. S. Stevens, S. Dusanter, S. Sklaveniti, T. Leonardis, N. Locoge, E. C. Wood
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 9563-9579 (2019)
Peroxy radicals were measured in a mixed deciduous forest atmosphere in Bloomington, Indiana, USA, during the Indiana Radical, Reactivity and Ozone Production Intercomparison (IRRONIC) during the summer of 2015. Total peroxy radicals ([XO2]≡[HO2]+
Externí odkaz:
https://doaj.org/article/c3f3cb28eb5f45efa546f4572429d672
Autor:
A. Akherati, C. D. Cappa, M. J. Kleeman, K. S. Docherty, J. L. Jimenez, S. M. Griffith, S. Dusanter, P. S. Stevens, S. H. Jathar
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 4561-4594 (2019)
Semi-volatile and intermediate-volatility organic compounds (SVOCs and IVOCs) from anthropogenic sources are likely to be important precursors of secondary organic aerosol (SOA) in urban airsheds, yet their treatment in most models is based on limite
Externí odkaz:
https://doaj.org/article/ac84e7ae5d6a46a39b29f48d080fffda
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 741-761 (2018)
Ground-level ozone (O3) is an important pollutant that affects both global climate change and regional air quality, with the latter linked to detrimental effects on both human health and ecosystems. Ozone is not directly emitted in the atmosphere
Externí odkaz:
https://doaj.org/article/60ae3521bb404c5b8cbe81ae7202ad46
Autor:
P. Rickly, P. S. Stevens
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 1-16 (2018)
Reactions of the hydroxyl radical (OH) play a central role in the chemistry of the atmosphere, and measurements of its concentration can provide a rigorous test of our understanding of atmospheric oxidation. Several recent studies have shown large
Externí odkaz:
https://doaj.org/article/e27876812e4d4f5a9d80541926e10a4e
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 95-109 (2018)
One technique used to measure concentrations of the hydroperoxy radical (HO2) in the atmosphere involves chemically converting it to OH by addition of NO and subsequent detection of OH. However, some organic peroxy radicals (RO2) can also be rapid
Externí odkaz:
https://doaj.org/article/8a8039f1036846adbcd857d2b987add0
Autor:
B. C. Schulze, H. W. Wallace, J. H. Flynn, B. L. Lefer, M. H. Erickson, B. T. Jobson, S. Dusanter, S. M. Griffith, R. F. Hansen, P. S. Stevens, T. VanReken, R. J. Griffin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 3, Pp 1805-1828 (2017)
Gas-phase biogenic volatile organic compounds (BVOCs) are oxidized in the troposphere to produce secondary pollutants such as ozone (O3), organic nitrates (RONO2), and secondary organic aerosol (SOA). Two coupled zero-dimensional models have been use
Externí odkaz:
https://doaj.org/article/73814bd147c34d4b894a5a22408e4a73