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Centre for Atmospheric Science

Senior Research Associate

I wear glasses nowI am an NCAS research scientist and University SRA 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 tropospheric ozone, 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.  I am involved in various data- and HPC-related activities: I am a Cambridge University 'Data Champion', am involved with the Center for Open Science as an 'Ambassador', the ESMValTool project and in 2022 I am resident on the Cambridge Accelerate Machine Learning Academy.

Research Projects

  • Cambridge is a contributor to the TerraFIRMA project where we lead on the future impact of near-term climate forcers.  My involvement follows from work on methane (and ozone) in chemistry-climate models, starting with Ines Heimann's PhD (see this publication). My colleague Zosia Staniaszek led a recent paper demonstrating the role of methane emissions in future climate in collaboration with the UK Met Office - based around this configuration of UKESM1 - and I have run some of the UK AerChemMIP consortium experiments using UKESM1 to look at the effect of methane in the chemistry-climate system.  These experiments were used in David Stevenson's recent CMIP6 evaluation paper for OH trends.  
  • I take an interest in the implementation of heterogeneous chemistry in the development versions of UM-UKCA.  Currently in a collaboration with Vichawan Sakulsupich, we are looking at feedbacks between oxidant and aerosol as part of the ACSIS analysis of tropospheric oxidants, also done in collaboration with folks in Reading.  Earlier, I looked at the role of heterogeneous chemistry in halogen release which involved collaboration with researchers at the British Antartic Survey, running simulations to quantify the release of bromine from sea-ice.  This led to some box modelling of HOx/halogen chemistry interactions in a recent study.  On the subject of bromine, 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 and a recent paper highlighted the effect of halogens on ozone levels in the troposphere.  
  • Tropospheric ozone remains a focus.  We are writing up the modelling work in the “Oxidant Budgets of the Northern Hemisphere Troposphere Since 1950” (OXBUDS) project together with Alex Archibald and Maria Zamyatina.  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.  With James Keeble, I am co-chairing a TOAR-II group (ROSTEES) looking at stratosphere-troposphere transport of ozone.


Currently, I am a fellow in chemistry and graduate tutor at Robinson College, for whom I have supervised at Part IA, IB and Part II 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 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.  I've served as a University Examiner at Part 1B and have done some viva-style exams for the Chemistry Dept for Part III and for the probationary review of the PhD.



The Regional Aerosol Model Intercomparison Project (RAMIP)
LJ Wilcox, RJ Allen, BH Samset, MA Bollasina, PT Griffiths, J Keeble, MT Lund, R Makkonen, J Merikanto, D O'Donnell, DJ Paynter, GG Persad, ST Rumbold, T Takemura, K Tsigaridis, S Undorf, DM Westervelt
– Geoscientific Model Development
Seasonal, interannual and decal variability of Tropospheric Ozone in the North Atlantic: Comparison of UM-UKCA and remote sensing observations for 2005-2018
MR Russo, BJ Kerridge, NL Abraham, J Keeble, BG Latter, R Siddans, J Weber, PT Griffiths, JA Pyle, AT Archibald
– Atmospheric Chemistry and Physics
Large Simulated Future Changes in the Nitrate Radical Under the CMIP6 SSP Scenarios: Implications for Oxidation Chemistry
S Archer-Nicholls, R Allen, NL Abraham, PT Griffiths, AT Archibald
– Atmospheric Chemistry and Physics
The Role of Anthropogenic Aerosols in Recent North Atlantic Climate Change: A Synthesis of Findings from the UK ACSIS Programme
L Wilcox, R Sutton, J Robson, B Dong, P Griffiths, D Grosvenor, D Hodson, J Keeble, S Rumbold, A Archibald, K Carslaw, A Dittus, B Harvey, B Sinha
The role of sulfur oxidation on cloud and aerosol properties in UKESM1 CMIP6 historical experiments
V Sakulsupich, PT Griffiths, AT Archibald
Tropospheric ozone budget in AerChemMIP experiments
P Griffiths, Y Shin, J Keeble, A Archibald
Using reduced representations of atmospheric fields to quantify the causal drivers of air pollution
S Hickman, P Griffiths, P Nowack, A Archibald
Development, intercomparison and evaluation of an improved mechanism for the oxidation of dimethyl sulfide
A Archibald, B Cala, S Archer-Nicholls, NL Abraham, P Griffiths, L Jacob, M Shin, L Revell, M Woodhouse
Regional impacts of CO and NOx mitigation in a methane emissions-driven model
Z Staniaszek, PT Griffiths, GA Folberth, FM O'Connor, AT Archibald
Interactions between atmospheric composition and climate change – Progress in understanding and future opportunities from AerChemMIP, PDRMIP, and RFMIP
S Fiedler, V Naik, FM O'Connor, CJ Smith, R Pincus, P Griffiths, R Kramer, T Takemura, RJ Allen, U Im, M Kasoar, A Modak, S Turnock, A Voulgarakis, D Watson-Parris, DM Westervelt, LJ Wilcox, A Zhao, WJ Collins, M Schulz, G Myhre, PM Forster
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Centre Highlights

• September 2nd 2023: Dr Annela Anger-Kraavi has co-authored a paper analysing just transition narratives in European coal regions. Read the paper here

• December 13th 2022: The CCPG have co-authored a paper on game-changing innovations towards net-zero, published in Energy Strategy Reviews. Read the open access paper here.

• November 15th 2022: The final conference of PARIS REINFORCE is taking place today in Sorbonne. Read more about the event here

• October 24th 2022: The CCPG have successfully submitted a proposal for the Cambridge-Tsinghua joint research initiative! 

• May 5th 2022: We've submitted to the UNFCCC's Global Stocktake (GST). More information is available on our news page. 

• March 23rd 2022: Multiple CAS academics have published a paper investigating the future role of anthropogenic methane emissions. Read the open access paper here.

• Feb 18th 2022: Dr Parris and Dr Anger-Kraavi have co-authored a paper that develops a tool to support co-designed transformative change. Read the open access paper here.

• Dec 16th 2021: Dr Parris has co-authored a paper that introduces a tool to support plastic pollution policy. Read the open access paper here.

• Nov 22nd 2021: Dr Anger-Kraavi has co-authored a paper with Paris Reinforce. Read the open access version here

• Nov 3rd 2021: Watch Dr Anger-Kraavi at the COP26 side event: Accelerating Implementation of the Paris Agreement - Ambition and Just Transitions via YouTube.

Want to know more about our high-profile publications? Check out our Publication Highlights!


NCAS Research Scientist

Research Interest Group

Telephone number

01223 748889

Email address