Zobrazeno 1 - 10
of 411
pro vyhledávání: '"P. Shepson"'
Autor:
W. R. Simpson, P. K. Peterson, U. Frieß, H. Sihler, J. Lampel, U. Platt, C. Moore, K. Pratt, P. Shepson, J. Halfacre, S. V. Nghiem
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 9291-9309 (2017)
Heterogeneous photochemistry converts bromide (Br−) to reactive bromine species (Br atoms and bromine monoxide, BrO) that dominate Arctic springtime chemistry. This phenomenon has many impacts such as boundary-layer ozone depletion, mercury oxid
Externí odkaz:
https://doaj.org/article/1b1ef9c76b164af383e41ccca8adfdc5
Autor:
W. R. Simpson, R. von Glasow, K. Riedel, P. Anderson, P. Ariya, J. Bottenheim, J. Burrows, L. J. Carpenter, U. Frieß, M. E. Goodsite, D. Heard, M. Hutterli, H.-W. Jacobi, L. Kaleschke, B. Neff, J. Plane, U. Platt, A. Richter, H. Roscoe, R. Sander, P. Shepson, J. Sodeau, A. Steffen, T. Wagner, E. Wolff
Publikováno v:
Atmospheric Chemistry and Physics, Vol 7, Iss 16, Pp 4375-4418 (2007)
During springtime in the polar regions, unique photochemistry converts inert halide salt ions (e.g. Br−) into reactive halogen species (e.g. Br atoms and BrO) that deplete ozone in the boundary layer to near zero levels. Since their discovery in th
Externí odkaz:
https://doaj.org/article/cade3631f75544eca5f758f866b33982
Autor:
N. Brockway, P. K. Peterson, K. Bigge, K. D. Hajny, P. B. Shepson, K. A. Pratt, J. D. Fuentes, T. Starn, R. Kaeser, B. H. Stirm, W. R. Simpson
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 23-40 (2024)
Reactive halogen chemistry in the springtime Arctic causes ozone depletion events and alters the rate of pollution processing. There are still many uncertainties regarding this chemistry, including the multiphase recycling of halogens and how sea ice
Externí odkaz:
https://doaj.org/article/760993564a08400ba048cd5ff96edc66
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:
Q. Chen, J. A. Mirrielees, S. Thanekar, N. A. Loeb, R. M. Kirpes, L. M. Upchurch, A. J. Barget, N. N. Lata, A. R. W. Raso, S. M. McNamara, S. China, P. K. Quinn, A. P. Ault, A. Kennedy, P. B. Shepson, J. D. Fuentes, K. A. Pratt
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 15263-15285 (2022)
Sea salt aerosols play an important role in the radiation budget and atmospheric composition over the Arctic, where the climate is rapidly changing. Previous observational studies have shown that Arctic sea ice leads are an important source of sea sa
Externí odkaz:
https://doaj.org/article/332a52e36d664e2784f5bcf0364248e7
Akademický článek
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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
Akademický článek
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Akademický článek
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Autor:
T. S. Jones, J. E. Franklin, J. Chen, F. Dietrich, K. D. Hajny, J. C. Paetzold, A. Wenzel, C. Gately, E. Gottlieb, H. Parker, M. Dubey, F. Hase, P. B. Shepson, L. H. Mielke, S. C. Wofsy
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 13131-13147 (2021)
Cities represent a large and concentrated portion of global greenhouse gas emissions, including methane. Quantifying methane emissions from urban areas is difficult, and inventories made using bottom-up accounting methods often differ greatly from to
Externí odkaz:
https://doaj.org/article/336bdfae57394bb6ac4ccc56785a7cae