Zobrazeno 1 - 10
of 378
pro vyhledávání: '"C E Johnson"'
Autor:
S T Turnock, E W Butt, T B Richardson, G W Mann, C L Reddington, P M Forster, J Haywood, M Crippa, G Janssens-Maenhout, C E Johnson, N Bellouin, K S Carslaw, D V Spracklen
Publikováno v:
Environmental Research Letters, Vol 11, Iss 2, p 024010 (2016)
European air quality legislation has reduced emissions of air pollutants across Europe since the 1970s, affecting air quality, human health and regional climate. We used a coupled composition-climate model to simulate the impacts of European air qual
Externí odkaz:
https://doaj.org/article/b83533a9d3c94f1a8adf66687a5a70cb
Autor:
S. S. Dhomse, G. W. Mann, J. C. Antuña Marrero, S. E. Shallcross, M. P. Chipperfield, K. S. Carslaw, L. Marshall, N. L. Abraham, C. E. Johnson
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 13627-13654 (2020)
Accurately quantifying volcanic impacts on climate is a key requirement for robust attribution of anthropogenic climate change. Here we use the Unified Model – United Kingdom Chemistry and Aerosol (UM-UKCA) composition–climate model to simulate t
Externí odkaz:
https://doaj.org/article/1b6d3f2ffcc74a1d8c7c22ee983f4c9d
Autor:
A. T. Archibald, F. M. O'Connor, N. L. Abraham, S. Archer-Nicholls, M. P. Chipperfield, M. Dalvi, G. A. Folberth, F. Dennison, S. S. Dhomse, P. T. Griffiths, C. Hardacre, A. J. Hewitt, R. S. Hill, C. E. Johnson, J. Keeble, M. O. Köhler, O. Morgenstern, J. P. Mulcahy, C. Ordóñez, R. J. Pope, S. T. Rumbold, M. R. Russo, N. H. Savage, A. Sellar, M. Stringer, S. T. Turnock, O. Wild, G. Zeng
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 1223-1266 (2020)
Here we present a description of the UKCA StratTrop chemical mechanism, which is used in the UKESM1 Earth system model for CMIP6. The StratTrop chemical mechanism is a merger of previously well-evaluated tropospheric and stratospheric mechanisms, and
Externí odkaz:
https://doaj.org/article/3fb23f93b0d545cea8f1f37297c29d2d
Autor:
M. Yoshioka, L. A. Regayre, K. J. Pringle, J. S. Johnson, G. W. Mann, D. G. Partridge, D. M. H. Sexton, G. M. S. Lister, N. Schutgens, P. Stier, Z. Kipling, N. Bellouin, J. Browse, B. B. B. Booth, C. E. Johnson, B. Johnson, J. D. P. Mollard, L. Lee, K. S. Carslaw
Publikováno v:
Journal of Advances in Modeling Earth Systems, Vol 11, Iss 11, Pp 3728-3754 (2019)
Abstract Tropospheric aerosol radiative forcing has persisted for many years as one of the major causes of uncertainty in global climate model simulations. To sample the range of plausible aerosol and atmospheric states and perform robust statistical
Externí odkaz:
https://doaj.org/article/05a88f8d2d39480bb9f5ae2fb5e537f1
Autor:
Z. Kipling, P. Stier, C. E. Johnson, G. W. Mann, N. Bellouin, S. E. Bauer, T. Bergman, M. Chin, T. Diehl, S. J. Ghan, T. Iversen, A. Kirkevåg, H. Kokkola, X. Liu, G. Luo, T. van Noije, K. J. Pringle, K. von Salzen, M. Schulz, Ø. Seland, R. B. Skeie, T. Takemura, K. Tsigaridis, K. Zhang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 2221-2241 (2016)
The vertical profile of aerosol is important for its radiative effects, but weakly constrained by observations on the global scale, and highly variable among different models. To investigate the controlling factors in one particular model, we inve
Externí odkaz:
https://doaj.org/article/ee27f2a449ce4c7191789b6404d23ba4
Autor:
S. T. Turnock, D. V. Spracklen, K. S. Carslaw, G. W. Mann, M. T. Woodhouse, P. M. Forster, J. Haywood, C. E. Johnson, M. Dalvi, N. Bellouin, A. Sanchez-Lorenzo
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 16, Pp 9477-9500 (2015)
Substantial changes in anthropogenic aerosols and precursor gas emissions have occurred over recent decades due to the implementation of air pollution control legislation and economic growth. The response of atmospheric aerosols to these changes and
Externí odkaz:
https://doaj.org/article/5b9b528078854963adee89216834e33c
Autor:
S. S. Dhomse, K. M. Emmerson, G. W. Mann, N. Bellouin, K. S. Carslaw, M. P. Chipperfield, R. Hommel, N. L. Abraham, P. Telford, P. Braesicke, M. Dalvi, C. E. Johnson, F. O'Connor, O. Morgenstern, J. A. Pyle, T. Deshler, J. M. Zawodny, L. W. Thomason
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 20, Pp 11221-11246 (2014)
We use a stratosphere–troposphere composition–climate model with interactive sulfur chemistry and aerosol microphysics, to investigate the effect of the 1991 Mount Pinatubo eruption on stratospheric aerosol properties. Satellite measurements indi
Externí odkaz:
https://doaj.org/article/a507b1194df0419cab303921c6a6ca71
Autor:
R. E. L. West, P. Stier, A. Jones, C. E. Johnson, G. W. Mann, N. Bellouin, D. G. Partridge, Z. Kipling
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 12, Pp 6369-6393 (2014)
The activation of aerosols to form cloud droplets is dependent upon vertical velocities whose local variability is not typically resolved at the GCM grid scale. Consequently, it is necessary to represent the subgrid-scale variability of vertical velo
Externí odkaz:
https://doaj.org/article/665ce064eedf466c9a2802a3e2e1d2a0
Autor:
G. W. Mann, K. S. Carslaw, C. L. Reddington, K. J. Pringle, M. Schulz, A. Asmi, D. V. Spracklen, D. A. Ridley, M. T. Woodhouse, L. A. Lee, K. Zhang, S. J. Ghan, R. C. Easter, X. Liu, P. Stier, Y. H. Lee, P. J. Adams, H. Tost, J. Lelieveld, S. E. Bauer, K. Tsigaridis, T. P. C. van Noije, A. Strunk, E. Vignati, N. Bellouin, M. Dalvi, C. E. Johnson, T. Bergman, H. Kokkola, K. von Salzen, F. Yu, G. Luo, A. Petzold, J. Heintzenberg, A. Clarke, J. A. Ogren, J. Gras, U. Baltensperger, U. Kaminski, S. G. Jennings, C. D. O'Dowd, R. M. Harrison, D. C. S. Beddows, M. Kulmala, Y. Viisanen, V. Ulevicius, N. Mihalopoulos, V. Zdimal, M. Fiebig, H.-C. Hansson, E. Swietlicki, J. S. Henzing
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 9, Pp 4679-4713 (2014)
Many of the next generation of global climate models will include aerosol schemes which explicitly simulate the microphysical processes that determine the particle size distribution. These models enable aerosol optical properties and cloud condens
Externí odkaz:
https://doaj.org/article/2560bc87a1be4508a1bf678f8844824b
Autor:
F. M. O'Connor, C. E. Johnson, O. Morgenstern, N. L. Abraham, P. Braesicke, M. Dalvi, G. A. Folberth, M. G. Sanderson, P. J. Telford, A. Voulgarakis, P. J. Young, G. Zeng, W. J. Collins, J. A. Pyle
Publikováno v:
Geoscientific Model Development, Vol 7, Iss 1, Pp 41-91 (2014)
In this paper, we present a description of the tropospheric chemistry component of the UK Chemistry and Aerosols (UKCA) model which has been coupled to the Met Office Hadley Centre's HadGEM family of climate models. We assess the model's transport an
Externí odkaz:
https://doaj.org/article/32d35bd5690f4e4f87f1206b8f5c75d0