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Yusuf Hamied Department of Chemistry

 

Dr Luke Abraham

Research Professor

I am a Director of Research in the Department, equivalent to Professor (Grade 12). I am a member of the National Centre for Atmospheric Science, where I am also the Training Theme Leader, working at the Centre for Atmospheric Science here in the Department.

I work with the United Kingdom Chemistry and Aerosols community chemistry-aerosol-climate model. This is based on the Met Office Unified Model, and is a collaboration between the Universities of Cambridge, Leeds, Oxford, and the Met Office.

I am a Fellow of the Software Sustainability Institute and have written blogs on how to use virtual machines for training and the benefits of in-person training, as well as co-authoring a blog on how to write good research software. I was also interviewed by the Naked Scientists podcast, discussing climate modelling and what can go wrong and how to fix it.

I am a member of NCAS Computational Modelling Services and provide model support for UKCA on both ARCHER2 and Monsoon2. If you require support please raise a ticket with the CMS Helpdesk, or if you would like to know more about UKCA in general, please email me, or browse through the UKCA wiki. This provides information about the model, the standard jobs that are available, publications using the model, and also a tutorial covering how to get started with the model and add in new chemistry, emissions, species etc.

Research Interests

I am interested in chemistry-climate interactions and Earth-system modelling. I joined the group to work on the QUEST Earth-System Model that was based around the UKCA chemistry-aerosol-climate model. This is part of the UM and forms the chemistry and aerosol components of UKESM, the UK joint NERC-Met Office Earth-system model.

A lot of my past work has been on the development of a coupled atmosphere-ocean-chemistry model, using the MetUM atmosphere and NEMO/CICE, as covered in an NCAS research highlight. I am also been involved with the CCMI project. The video below follows the evolution of the Total Ozone Column from 1960-2100 from one of our REF-C2 ensemble members that was submitted to CCMI-1.

As part of my work on model development I am interested in the coupling of UKCA to the Unified Model, as well as other sub-models. The diagram below shows the couplings from the UM to the UKCA model.

Teaching

I have developed a series of UKCA Tutorials. These tutorials are designed to be run in your own time, although I also run a face-to-face tutorial which covers the contents. You can use the Met Office Virtual Machine to go through the materials on a PC or the JASMIN unmanaged cloud or on AWS. I have discussed using this approach for online training at the JASMIN User Seminar Series and the SemtembRSE online conference. I am also a Carpentries Instructor.

Since 2015 UKCA training has been held in the Department, with the 2018 lectures recorded and available online. Details of future courses can be found on the NCAS website.

The image belows shows part of the emissions task - the regridding of emissions data from 0.5x0.5 degress to UM N96 resolution.

Current PhD Projects

I am currently advertising PhD projects within the NERC CREATES Doctoral Landscape Award in the University. In particular, I have one project with CASE support from the UK Met Office on lightning within Earth System Models. Please contact me if you are interested in discussing potential projects further.

Links

Publications

Attribution of stratospheric and tropospheric ozone changes between 1850 and 2014 in CMIP6 models
G Zeng, NL Abraham, AT Archibald, SE Bauer, M Deushi, LK Emmons, PT Griffiths, B Hassler, LW Horowitz, J Keeble, MJ Mills, O Morgenstern, LT Murray, V Naik, FM O'Connor, N Oshima, LT Sentman, S Tilmes, K Tsigaridis, J Williams, PJ Young
(2022)
(doi: 10.1002/essoar.10510050.1)
Exploring the sensitivity of atmospheric nitrate concentrations to nitric acid uptake rate using the Met Office's Unified Model
AC Jones, A Hill, S Remy, NL Abraham, M Dalvi, C Hardacre, AJ Hewitt, B Johnson, JP Mulcahy, ST Turnock
– Atmospheric Chemistry and Physics
(2021)
21,
15901
(doi: 10.5194/acp-21-15901-2021)
Improvements to the representation of BVOC chemistry-climate interactions in UKCA (vn11.5) with the CRI-Strat 2 mechanism: Incorporation and Evaluation
J Weber, S Archer-Nicholls, NL Abraham, YM Shin, TJ Bannan, CJ Percival, A Bacak, P Artaxo, M Jenkin, MAH Khan, DE Shallcross, RH Schwantes, J Williams, AT Archibald
– Geoscientific Model Development
(2021)
2021,
1
(doi: 10.5194/gmd-14-5239-2021)
Improvements to the representation of BVOC chemistry-climate interactions in UKCA (v11.5) with the CRI-Strat 2 mechanism: Incorporation and evaluation
J Weber, S Archer-Nicholls, NL Abraham, YM Shin, TJ Bannan, CJ Percival, A Bacak, P Artaxo, M Jenkin, MAH Khan, DE Shallcross, RH Schwantes, J Williams, AT Archibald
– Geoscientific Model Development
(2021)
14,
5239
(doi: 10.5194/gmd-14-5239-2021)
Climate change modulates the stratospheric volcanic sulfate aerosol lifecycle and radiative forcing from tropical eruptions.
TJ Aubry, J Staunton-Sykes, LR Marshall, J Haywood, NL Abraham, A Schmidt
– Nat Commun
(2021)
12,
4708
(doi: 10.1038/s41467-021-24943-7)
Assessing and improving cloud-height-based parameterisations of global lightning flash rate, and their impact on lightning-produced NOxand tropospheric composition in a chemistry-climate model
AK Luhar, IE Galbally, MT Woodhouse, N Luke Abraham
– Atmospheric Chemistry and Physics
(2021)
21,
7053
(doi: 10.5194/acp-21-7053-2021)
The Common Representative Intermediates Mechanism Version 2 in the United Kingdom Chemistry and Aerosols Model
S Archer-Nicholls, NL Abraham, YM Shin, J Weber, MR Russo, D Lowe, SR Utembe, FM O'Connor, B Kerridge, B Latter, R Siddans, M Jenkin, O Wild, AT Archibald
– Journal of Advances in Modeling Earth Systems
(2021)
13,
e2020MS002420
(doi: 10.1029/2020MS002420)
Supplementary material to "Improvements to the representation of BVOC chemistry-climate interactions in UKCA (vn11.5) with the CRI-Strat 2 mechanism: Incorporation and Evaluation "
J Weber, S Archer-Nicholls, NL Abraham, YM Shin, TJ Bannan, CJ Percival, A Bacak, P Artaxo, M Jenkin, MAH Khan, DE Shallcross, RH Schwantes, J Williams, AT Archibald
(2021)
(doi: 10.5194/gmd-2021-119-supplement)
Constraints on global aerosol number concentration, SO2 and condensation sink in UKESM1 using ATom measurements
A Ranjithkumar, H Gordon, C Williamson, A Rollins, K Pringle, A Kupc, N Luke Abraham, C Brock, K Carslaw
– Atmospheric Chemistry and Physics
(2021)
21,
4979
(doi: 10.5194/acp-21-4979-2021)
Tropospheric ozone in CMIP6 simulations
PT Griffiths, LT Murray, G Zeng, YM Shin, NL Abraham, AT Archibald, M Deushi, LK Emmons, IE Galbally, B Hassler, LW Horowitz, J Keeble, J Liu, O Moeini, V Naik, FM O'Connor, N Oshima, D Tarasick, S Tilmes, ST Turnock, O Wild, PJ Young, P Zanis
– Atmospheric Chemistry and Physics
(2021)
21,
4187
(doi: 10.5194/acp-21-4187-2021)
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Telephone number

01223 748899

Email address

nla27@cam.ac.uk

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