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Department of Chemistry

 

I am an NCAS Principal Research Associate in the Department, working at the Centre for Atmospheric Science.

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 also a member of NCAS-CMS and provide model support for UKCA on both ARCHER and MONSooN. 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, and now work on the UKCA chemistry-aerosol-climate model, which is part of the UM and will form the chemistry and aerosol components of UK-ESM1, the next generation 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. Recently I have 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 ensemble members.

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 current couplings at MetUM version 8.5 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 can also run a face-to-face tutorial which covers the contents. If you are interested in these tutorials, or would like me to run a session at your institution, please contact me.

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 MetUM N96 resolution.

Publications

Using machine learning to build temperature-based ozone parameterizations for climate sensitivity simulations
P Nowack, P Braesicke, J Haigh, NL Abraham, J Pyle, A Voulgarakis
– Environmental Research Letters
(2018)
13,
ARTN 104016
Using a virtual machine environment for developing, testing, and training for the UM-UKCA composition-climate model, using Unified Model version 10.9 and above
NL Abraham, AT Archibald, P Cresswell, S Cusworth, M Dalvi, D Matthews, S Wardle, S Whitehouse
– Geoscientific Model Development
(2018)
11,
3647
Estimates of ozone return dates from Chemistry-Climate Model Initiative simulations
SS Dhomse, D Kinnison, MP Chipperfield, RJ Salawitch, I Cionni, MI Hegglin, NL Abraham, H Akiyoshi, AT Archibald, EM Bednarz, S Bekki, P Braesicke, N Butchart, M Dameris, M Deushi, S Frith, SC Hardiman, B Hassler, LW Horowitz, RM Hu, P Jöckel, B Josse, O Kirner, S Kremser, U Langematz, J Lewis, M Marchand, M Lin, E Mancini, V Marécal, M Michou, O Morgenstern, FM O'Connor, L Oman, G Pitari, DA Plummer, JA Pyle, LE Revell, E Rozanov, R Schofield, A Stenke, K Stone, K Sudo, S Tilmes, D Visioni, Y Yamashita, G Zeng
– Atmospheric Chemistry and Physics
(2018)
18,
8409
Revisiting the Mystery of Recent Stratospheric Temperature Trends
AC Maycock, WJ Randel, AK Steiner, AY Karpechko, J Christy, R Saunders, DWJ Thompson, CZ Zou, A Chrysanthou, N Luke Abraham, H Akiyoshi, AT Archibald, N Butchart, M Chipperfield, M Dameris, M Deushi, S Dhomse, G Di Genova, P Jöckel, DE Kinnison, O Kirner, F Ladstädter, M Michou, O Morgenstern, F O'Connor, L Oman, G Pitari, DA Plummer, LE Revell, E Rozanov, A Stenke, D Visioni, Y Yamashita, G Zeng
– Geophysical Research Letters
(2018)
45,
9919
On ozone trend detection: Using coupled chemistry-climate simulations to investigate early signs of total column ozone recovery
J Keeble, H Brown, NL Abraham, NRP Harris, JA Pyle
– Atmospheric Chemistry and Physics
(2018)
18,
7625
Global modelling of the total OH reactivity: Investigations on the "missing" OH sink and its atmospheric implications
V Ferracci, I Heimann, N Luke Abraham, JA Pyle, AT Archibald
– Atmospheric Chemistry and Physics
(2018)
18,
7109
The impact of stratospheric ozone feedbacks on climate sensitivity estimates
PJ Nowack, NL Abraham, P Braesicke, JA Pyle
– Journal of Geophysical Research - Atmospheres
(2018)
123,
4630
Tropospheric jet response to Antarctic ozone depletion: An update with Chemistry-Climate Model Initiative (CCMI) models
SW Son, BR Han, CI Garfinkel, SY Kim, R Park, NL Abraham, H Akiyoshi, AT Archibald, N Butchart, MP Chipperfield, M Dameris, M Deushi, SS Dhomse, SC Hardiman, P Jöckel, D Kinnison, M Michou, O Morgenstern, FM O'Connor, LD Oman, DA Plummer, A Pozzer, LE Revell, E Rozanov, A Stenke, K Stone, S Tilmes, Y Yamashita, G Zeng
– Environmental Research Letters
(2018)
13,
054024
Stratospheric ozone loss over the Eurasian continent induced by the polar vortex shift
J Zhang, W Tian, F Xie, MP Chipperfield, W Feng, S-W Son, NL Abraham, AT Archibald, S Bekki, N Butchart, M Deushi, S Dhomse, Y Han, P Jöckel, D Kinnison, O Kirner, M Michou, O Morgenstern, FM O'Connor, G Pitari, DA Plummer, LE Revell, E Rozanov, D Visioni, W Wang, G Zeng
– Nat Commun
(2018)
9,
206
Diagnosing the radiative and chemical contributions to future changes in tropical column ozone with the UM-UKCA chemistry-climate model
J Keeble, EM Bednarz, A Banerjee, N Luke Abraham, NRP Harris, AC Maycock, JA Pyle
– Atmospheric Chemistry and Physics
(2017)
17,
13801
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Research Group

Telephone number

01223 748899

Email address

nla27@cam.ac.uk