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Department of Chemistry

 

I am interested in interactions between the biosphere and climate, mediated via the chemical oxidation of biogenic volatile organic compouds (BVOCs). BVOCs affect the atmosphere's oxidising capacity and thus methane lifetime (with consequences for the Earth's radiative budget) and contribute to aerosol formation and growth. Aerosols scatter radiation and aid cloud formation thus cooling the atmosphere. These interactions have the potential to cause feedback loops which could oppose or exacerbate climate change. As well as climate model analysis, I am also doing research on the fundamental chemistry behind the formation of the smallest particles, focusing on the interactions of peroxy radicals from various BVOCS, and incorporating this into the global climate models UKCA and UKESM. I have been involved in the 6th Coupled Model Intercomparison Project (CMIP6) looking at biogeochemcial feedbacks which will contribute to the evidence base used by the IPCC.

 

Publications

Climate-driven chemistry and aerosol feedbacks in CMIP6 Earth system models
G Thornhill, W Collins, D Olivié, A Archibald, S Bauer, R Checa-Garcia, S Fiedler, G Folberth, A Gjermundsen, L Horowitz, J-F Lamarque, M Michou, J Mulcahy, P Nabat, V Naik, FM O'Connor, F Paulot, M Schulz, CE Scott, R Seferian, C Smith, T Takemura, S Tilmes, J Weber
– Atmospheric Chemistry and Physics
(2020)
1
Afforestation’s potential to help Cambridgeshire reach net-zero by 2050
J Weber
– Cambridge Journal of Science and Policy
1,
e5820974944
CRI-HOM: A novel chemical mechanism for simulating highly oxygenated organic molecules (HOMs) in global chemistry–aerosol–climate models
J Weber, S Archer-Nicholls, P Griffiths, T Berndt, M Jenkin, H Gordon, C Knote, AT Archibald
– Atmospheric Chemistry and Physics
20,
10889
Supplementary material to "CRI-HOM: A novel chemical mechanism for simulating Highly Oxygenated Organic Molecules (HOMs) in global chemistry-aerosol-climate models"
J Weber, A Archibald, P Griffiths, S Archer-Nicholls, T Berndt, M Jenkin, H Gordon, C Knote
Linking Peroxy Radical Chemistry to Global Climate: The Common Representatives Intermediates Chemical Mechanism in the UK Earth System Model
S Archer-Nicholls, JM Weber, NL Abraham, MR Russo, C Knote, PT Griffiths, D Lowe, S Utembe, F O'Connor, O Wild, T Berndt, ME Jenkin, AT Archibald
Minimal climate impacts from short-lived climate forcers following emission reductions related to the COVID-19 pandemic.
J Weber, YM Shin, J Staunton Sykes, S Archer-Nicholls, NL Abraham, AT Archibald