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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.

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

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 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
(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
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, R Butler, LJ Carpenter, S Dhomse, M Dorf, A Engel, L Feng, 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, PI Palmer, K Pfeilsticker, JA Pyle, B Quack, AD Robinson, E Saikawa, A Saiz-Lopez, S Sala, B-M Sinnhuber, S Taguchi, S Tegtmeier, RT Lidster, C Wilson, F Ziska
– Atmospheric Chemistry and Physics Discussions
(2016)
2016,
1
Influence of isoprene chemical mechanism on modelled changes in tropospheric ozone due to climate and land use over the 21st century
OJ Squire, AT Archibald, PT Griffiths, ME Jenkin, D Smith, JA Pyle
– Atmospheric Chemistry and Physics
(2015)
15,
5123
Isoprene chemistry in pristine and polluted Amazon environments: Eulerian and Lagrangian model frameworks and the strong bearing they have on our understanding of surface ozone and predictions of rainforest exposure to this priority pollutant
JG Levine, AR MacKenzie, OJ Squire, AT Archibald, PT Griffiths, NL Abraham, JA Pyle, DE Oram, G Forster, JF Brito, JD Lee, JR Hopkins, AC Lewis, SJB Bauguitte, CF Demarco, P Artaxo, P Messina, J Lathière, DA Hauglustaine, E House, CN Hewitt, E Nemitz
– Atmospheric Chemistry and Physics Discussions
(2015)
15,
24251
Influence of isoprene chemical mechanism on modelled changes in tropospheric ozone due to climate and land use over the 21st century
OJ Squire, AT Archibald, PT Griffiths, ME Jenkin, JA Pyle
– Atmospheric Chemistry and Physics Discussions
(2014)
14,
22385
Re-evaluating the reactive uptake of HOBr in the troposphere with implications for the marine boundary layer and volcanic plumes
TJ Roberts, L Jourdain, PT Griffiths, M Pirre
– Atmospheric Chemistry and Physics Discussions
(2014)
14,
2717
Re-evaluating the reactive uptake of HOBr in the troposphere with implications for the marine boundary layer and volcanic plumes
TJ Roberts, L Jourdain, PT Griffiths, M Pirre
– Atmospheric Chemistry and Physics
(2014)
14,
11185
Adsorption and hydrolysis of alcohols and carbonyls on ice at temperatures of the upper troposphere.
A Symington, LM Leow, PT Griffiths, RA Cox
– The journal of physical chemistry. A
(2012)
116,
5990
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Research Group

Research Interest Group

Telephone number

01223 748889

Email address

ptg21@cam.ac.uk