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Department of Chemistry


I wear glasses nowI am an NCAS research scientist working with Professor John Pyle and Dr Alex Archibald. My background is in experimental physical chemistry and aerosol-cloud interactions, but for the last ten years I have been working on numerical simulation of the atmosphere, focussing on the chemistry of the troposphere. My main interests are in halogens, methane, NOx and heterogeneous chemistry. I am also interested in model-measurement comparisons and ways to quantify and improve model treatments of atmospheric composition.  To the unalloyed delight of the Chemistry Dept IT officers, I am an ARCHER 'champion' which means I should act as a local point of contact if people are interested in the ARCHER HPC platform.  Recently I became a Cambridge University 'Data Champion.'

Research Projects

  • I am leading some work on the treatment of methane in chemistry-climate models, following on Ines Heimann's PhD.  On her behalf, I presented some of this work at the IGAC conference in Takamatsu (please contact me for a copy of the poster).  This work has recently been submitted.  There will be a meeting in Cambridge on February 10th-11th, looking at methane in Earth System models.
  • I take an interest in the implementation of heterogeneous chemistry in the development versions of UM-UKCA.  Currently I'm looking at feedbacks between oxidant and aerosol as part of the ACSIS analysis of tropospheric oxidants.
  • My work in halogens began with the NERC BLOWSEA project, which examines the impact of blowing snow on tropospheric ozone. This involves collaboration with researchers at the British Antartic Survey, running simulations which quantify the release of bromine from sea-ice, and I'm also running box model simulations of HOx/halogen chemistry interactions.  I recently contributed some box modelling to a related study.  I led our contribution to the TRANSCOM-VSLS intercomparison project, headed by Ryan Hossaini at Lancaster, which looked at the transport and lifetime of very short lived halogen species.  
  • Tropospheric ozone remains a focus.  I am finishing the modelling work in the “Oxidant Budgets of the Northern Hemisphere Troposphere Since 1950” (OXBUDS) project together with Alex Archibald and colleagues at UEA.  We're looking the impact of nitrate emissions and chemistry in UKCA.  I contributed to the forthcoming TOAR BUDGET paper, led an analysis of some work that used our CCMI REFC1SD integrations and was a lead author of a paper that examined tropospheric ozone in CMIP6 models.


Currently, I am a fellow in chemistry and graduate tutor at Robinson College, for whom I supervise at Part II and Part III level.  Previously, I was lecturer in the Part II course 'Chemistry of the Atmosphere' (2006-2009, and again 2016-2018), and have also lectured the A6 course 'Concepts in Physical Chemistry' (2012-2015).  I have also supervised Parts IA and IB Chemistry, the part II course 'High Resolution Spectroscopy' and the Part III interdisciplinary course 'Atmospheric Chemistry and Global Change' as well as sections of the Part IA and Part IB Geography tripos.  



Modelling the potential impacts of the recent, unexpected increase in CFC-11 emissions on total column ozone recovery
J Keeble, NL Abraham, AT Archibald, MP Chipperfield, S Dhomse, PT Griffiths, JA Pyle
– Atmospheric Chemistry and Physics
Description and evaluation of the UKCA stratosphere-troposphere chemistry scheme (StratTrop vn 1.0) implemented in UKESM1
AT Archibald, FM O'Connor, NL Abraham, S Archer-Nicholls, MP Chipperfield, M Dalvi, GA Folberth, F Dennison, SS Dhomse, PT Griffiths, C Hardacre, AJ Hewitt, R Hill, CE Johnson, J Keeble, MO Köhler, O Morgenstern, JP Mulchay, C Ordóñez, RJ Pope, S Rumbold, MR Russo, N Savage, A Sellar, M Stringer, S Turnock, O Wild, G Zeng
– Geoscientific Model Development Discussions
Influence of Sea Ice-Derived Halogens on Atmospheric HOx as Observed in Springtime Coastal Antarctica
N Brough, AE Jones, PT Griffiths
– Geophysical Research Letters
UKESM1: Description and Evaluation of the UK Earth System Model
AA Sellar, CG Jones, JP Mulcahy, Y Tang, A Yool, A Wiltshire, FM O'Connor, M Stringer, R Hill, J Palmieri, S Woodward, L de Mora, T Kuhlbrodt, ST Rumbold, DI Kelley, R Ellis, CE Johnson, J Walton, NL Abraham, MB Andrews, T Andrews, AT Archibald, S Berthou, E Burke, E Blockley, K Carslaw, M Dalvi, J Edwards, GA Folberth, N Gedney, PT Griffiths, AB Harper, MA Hendry, AJ Hewitt, B Johnson, A Jones, CD Jones, J Keeble, S Liddicoat, O Morgenstern, RJ Parker, V Predoi, E Robertson, A Siahaan, RS Smith, R Swaminathan, MT Woodhouse, G Zeng, M Zerroukat
– Journal of Advances in Modeling Earth Systems
Measuring Aerosol Phase Changes and Hygroscopicity with a Microresonator Mass Sensor
AT Zielinski, PJ Gallimore, PT Griffiths, RL Jones, AA Seshia, M Kalberer
– Anal Chem
Quasi-Newton methods for atmospheric chemistry simulations: implementation in UKCA UM vn10.8
E Esentürk, N Luke Abraham, S Archer-Nicholls, C Mitsakou, P Griffiths, A Archibald, J Pyle
– Geoscientific Model Development
Quasi-Newton Methods for Atmospheric Chemistry Simulations: Implementation in UKCA UM vn10.8
E Esenturk, L Abraham, S Archer-Nicholls, C Mitsakou, P Griffiths, A Archibald, J Pyle
– Geoscientific Model Development
Comprehensive modeling study of ozonolysis of oleic acid aerosol based on real-time, online measurements of aerosol composition
PJ Gallimore, PT Griffiths, FD Pope, JP Reid, M Kalberer
– Journal of Geophysical Research Atmospheres
Heterogeneous reaction of ClONO$_{2}$ with TiO$_{2}$ and SiO$_{2}$ aerosol particles: implications for stratospheric particle injection for climate engineering
M Tang, J Keeble, PJ Telford, FD Pope, P Braesicke, PT Griffiths, N Luke Abraham, J McGregor, I Matt Watson, R Anthony Cox, JA Pyle, M Kalberer
– Atmospheric Chemistry and Physics
Heterogeneous reaction of ClONO<sub>2</sub> with TiO<sub>2</sub> and SiO<sub>2</sub> aerosol particles: implications for stratospheric particle injection for climate engineering
MJ Tang, J Keeble, PJ Telford, FD Pope, P Braesicke, PT Griffiths, NL Abraham, J McGregor, IM Watson, RA Cox, JA Pyle, M Kalberer
– Atmospheric Chemistry and Physics Discussions
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Research Interest Group

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01223 748889

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