skip to content

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 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 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). 
  • I take an interest in the implementation of heterogeneous chemistry in the development versions of UM-UKCA.  Currently I'm running some simulations to investigate release of nitryl chloride, ClNO2, from sea-salt, and feedbacks between oxidant and aerosol as part of the ACSIS analysis of tropospheric oxidants which also has included an intercomparsion of observations from the FAAM aircraft with UKCA integrations.. 
  • 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 led our contribution to the TRANSCOM-VSLS intercomparison project, headed by Ryan Hossaini at Leeds, which looked at the transport and lifetime of very short lived halogen species.  

Teaching

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.  

 

Publications

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
(2019)
1
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
(2019)
1
Influence of Sea Ice‐Derived Halogens on Atmospheric HOx as Observed in Springtime Coastal Antarctica
N Brough, AE Jones, PT Griffiths
– Geophysical Research Letters
(2019)
46,
10168
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
(2018)
90,
9716
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
(2018)
11,
3089
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 Discussions
(2018)
11,
3089
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
(2017)
122,
4364
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
(2016)
16,
15397
Heterogeneous reaction of ClONO2 with TiO2 and SiO2 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
(2016)
1
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
R Hossaini, PK Patra, AA Leeson, G Krysztofiak, NL Abraham, SJ Andrews, AT Archibald, J Aschmann, EL Atlas, DA Belikov, H Bönisch, LJ Carpenter, S Dhomse, M Dorf, A Engel, W Feng, S Fuhlbrügge, PT Griffiths, NRP Harris, R Hommel, T Keber, K Krüger, ST Lennartz, S Maksyutov, H Mantle, GP Mills, B Miller, SA Montzka, F Moore, MA Navarro, DE Oram, K Pfeilsticker, JA Pyle, B Quack, AD Robinson, E Saikawa, A Saiz-Lopez, S Sala, BM Sinnhuber, S Taguchi, S Tegtmeier, RT Lidster, C Wilson, F Ziska
– Atmospheric Chemistry and Physics
(2016)
16,
9163
  • 1 of 5
  • >

Research Group

Research Interest Group

Telephone number

01223 748889

Email address

ptg21@cam.ac.uk