Search Results - "Abraham, N L"

On the Changing Role of the Stratosphere on the Tropospheric Ozone Budget: 1979–2010 by Griffiths, P. T., Keeble, J., Shin, Y. M., Abraham, N. L., Archibald, A. T., Pyle, J. A.

“…We study the evolution of tropospheric ozone over the period 1979–2010 using a chemistry‐climate model employing a stratosphere‐troposphere chemistry scheme…”
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The impact of lightning on tropospheric ozone chemistry using a new global lightning parametrisation by Finney, D. L, Doherty, R. M, Wild, O, Abraham, N. L

“…A lightning parametrisation based on upward cloud ice flux is implemented in a chemistry–climate model (CCM) for the first time. The UK Chemistry and Aerosols…”
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The impact of polar stratospheric ozone loss on Southern Hemisphere stratospheric circulation and climate by Keeble, J, Braesicke, P, Abraham, N. L, Roscoe, H. K, Pyle, J. A

“…The impact of polar stratospheric ozone loss resulting from chlorine activation on polar stratospheric clouds is examined using a pair of model integrations…”
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Lightning NOx, a key chemistry-climate interaction: impacts of future climate change and consequences for tropospheric oxidising capacity by Banerjee, A, Archibald, A T, Maycock, A C, Telford, P, Abraham, N L, Yang, X, Braesicke, P, Pyle, J A

“…Lightning is one of the major natural sources of NOx in the atmosphere. A suite of time slice experiments using a stratosphere-resolving configuration of the…”
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Evaluation of the new UKCA climate-composition model – Part 2: The Troposphere by O'Connor, F M, Johnson, CE, Morgenstern, O, Abraham, N L, Braesicke, P, Dalvi, M, Folberth, G A, Sander son, MG, Telford, P J, Voulgarakis, A

“…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…”
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How sensitive is the recovery of stratospheric ozone to changes in concentrations of very short-lived bromocarbons? by Yang, X, Abraham, N. L, Archibald, A. T, Braesicke, P, Keeble, J, Telford, P. J, Warwick, N. J, Pyle, J. A

“…Naturally produced very short-lived substances (VSLS) account for almost a quarter of the current stratospheric inorganic bromine, Bry. Following VSLS…”
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Circulation anomalies in the Southern Hemisphere and ozone changes by Braesicke, P, Keeble, J, Yang, X, Stiller, G, Kellmann, S, Abraham, N. L, Archibald, A, Telford, P, Pyle, J. A

“…We report results from two pairs of chemistry-climate model simulations using the same climate model but different chemical perturbations. In each pair of…”
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Influence of future climate and cropland expansion on isoprene emissions and tropospheric ozone by Squire, O. J, Archibald, A. T, Abraham, N. L, Beerling, D. J, Hewitt, C. N, Lathière, J, Pike, R. C, Telford, P. J, Pyle, J. A

“…Over the 21st century, changes in CO2 levels, climate and land use are expected to alter the global distribution of vegetation, leading to changes in trace gas…”
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Methane Emissions in a Chemistry‐Climate Model: Feedbacks and Climate Response by Heimann, I., Griffiths, P. T., Warwick, N. J., Abraham, N. L., Archibald, A. T., Pyle, J. A.

“…Understanding the past, present, and future evolution of methane remains a grand challenge. Here we have used a hierarchy of models, ranging from simple box…”
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Inclusion of mountain-wave-induced cooling for the formation of PSCs over the Antarctic Peninsula in a chemistry–climate model by Orr, A, Hosking, J. S, Hoffmann, L, Keeble, J, Dean, S. M, Roscoe, H. K, Abraham, N. L, Vosper, S, Braesicke, P

“…An important source of polar stratospheric clouds (PSCs), which play a crucial role in controlling polar stratospheric ozone depletion, is from the temperature…”
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Modelling the impact of megacities on local, regional and global tropospheric ozone and the deposition of nitrogen species by Stock, Z. S, Russo, M. R, Butler, T. M, Archibald, A. T, Lawrence, M. G, Telford, P. J, Abraham, N. L, Pyle, J. A

“…We examine the effects of ozone precursor emissions from megacities on present-day air quality using the global chemistry–climate model UM-UKCA (UK Met Office…”
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The Common Representative Intermediates Mechanism Version 2 in the United Kingdom Chemistry and Aerosols Model by Archer‐Nicholls, S., Abraham, N. L., Shin, Y. M., Weber, J., Russo, M. R., Lowe, D., Utembe, S. R., O'Connor, F. M., Kerridge, B., Latter, B., Siddans, R., Jenkin, M., Wild, O., Archibald, A. T.

“…We document the implementation of the Common Representative Intermediates Mechanism version 2, reduction 5 into the United Kingdom Chemistry and Aerosol model…”
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Heterogeneous reaction of N2O5 with airborne TiO2 particles and its implication for stratospheric particle injection by Tang, M J, Telford, P J, Pope, F D, Rkiouak, L, Abraham, N L, Archibald, A T, Braesicke, P, Pyle, J A, McGregor, J, Watson, I M, Cox, R A, Kalberer, M

“…Injection of aerosol particles (or their precursors) into the stratosphere to scatter solar radiation back into space has been suggested as a solar-radiation…”
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Impacts of HOx regeneration and recycling in the oxidation of isoprene: Consequences for the composition of past, present and future atmospheres by Archibald, A. T., Levine, J. G., Abraham, N. L., Cooke, M. C., Edwards, P. M., Heard, D. E., Jenkin, M. E., Karunaharan, A., Pike, R. C., Monks, P. S., Shallcross, D. E., Telford, P. J., Whalley, L. K., Pyle, J. A.

“…A global chemistry‐climate model is used to assess the impact on atmospheric composition of the regeneration and recycling of HOx in the photo‐oxidation of…”
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Implementation of the Fast-JX Photolysis scheme (v6.4) into the UKCA component of the MetUM chemistry-climate model (v7.3) by Telford, P J, Abraham, N L, Archibald, A T, Braesicke, P, Dalvi, M, Morgenstern, O, O'Connor, F M, Richards, NAD, Pyle, JA

“…Atmospheric chemistry is driven by photolytic reactions, making their modelling a crucial component of atmospheric models. We describe the implementation and…”
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Global multi-year O3-CO correlation patterns from models and TES satellite observations by Voulgarakis, A, Telford, P J, Aghedo, A M, Braesicke, P, Faluvegi, G, Abraham, N L, Bowman, K W, Pyle, J A, Shindell, D T

“…The correlation between measured tropospheric ozone (O3 ) and carbon monoxide (CO) has been used extensively in tropospheric chemistry studies to explore the…”
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Effects of climate-induced changes in isoprene emissions after the eruption of Mount Pinatubo by Telford, P. J., Lathière, J., Abraham, N. L., Archibald, A. T., Braesicke, P., Johnson, C. E., Morgenstern, O., O'Connor, F. M., Pike, R. C., Wild, O., Young, P. J., Beerling, D. J., Hewitt, C. N., Pyle, J.

“…In the 1990s the rates of increase of greenhouse gas concentrations, most notably of methane, were observed to change, for reasons that have yet to be fully…”
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Aerosol microphysics simulations of the Mt.~Pinatubo eruption with the UM-UKCA composition-climate model by Dhomse, S. S., Emmerson, K. M., Mann, G. W., Bellouin, N., Carslaw, K. S., Chipperfield, M. P., Hommel, R., Abraham, N. L., Telford, P., Braesicke, P., Dalvi, M., Johnson, C. E., O'Connor, F., Morgenstern, O., Pyle, J. A., Deshler, T., Zawodny, J. M., Thomason, L. W.

“…We use a stratosphere–troposphere composition–climate model with interactive sulfur chemistry and aerosol microphysics, to investigate the effect of the 1991…”
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A multi-model intercomparison of halogenated very short-lived substances (TransCom-VSLS): linking oceanic emissions and tropospheric transport for a reconciled estimate of the stratospheric source gas injection of bromine by Hossaini, R, Patra, P. K, Leeson, A. A, Krysztofiak, G, Abraham, N. L, Andrews, S. J, Archibald, A. T, Aschmann, J, Atlas, E. L, Belikov, D. A, Bönisch, H, Carpenter, L. J, Dhomse, S, Dorf, M, Engel, A, Feng, W, Fuhlbrügge, S, Griffiths, P. T, Harris, N. R. P, Hommel, R, Keber, T, Krüger, K, Lennartz, S. T, Maksyutov, S, Mantle, H, Mills, G. P, Miller, B, Montzka, S. A, Moore, F, Navarro, M. A, Oram, D. E, Pfeilsticker, K, Pyle, J. A, Quack, B, Robinson, A. D, Saikawa, E, Saiz-Lopez, A, Sala, S, Sinnhuber, B.-M, Taguchi, S, Tegtmeier, S, Lidster, R. T, Wilson, C, Ziska, F

“…The first concerted multi-model intercomparison of halogenated very short-lived substances (VSLS) has been performed, within the framework of the ongoing…”
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Modelling future changes to the stratospheric source gas injection of biogenic bromocarbons by Hossaini, R., Chipperfield, M. P., Dhomse, S., Ordóñez, C., Saiz-Lopez, A., Abraham, N. L., Archibald, A., Braesicke, P., Telford, P., Warwick, N., Yang, X., Pyle, J.

“…Simulations with a chemistry‐climate model (CCM) show a future increase in the stratospheric source gas injection (SGI) of biogenic very short‐lived substances…”
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