Geoscientific Model Development (Mar 2020)
Description and evaluation of the UKCA stratosphere–troposphere chemistry scheme (StratTrop vn 1.0) implemented in UKESM1
- A. T. Archibald,
- A. T. Archibald,
- F. M. O'Connor,
- N. L. Abraham,
- N. L. Abraham,
- S. Archer-Nicholls,
- M. P. Chipperfield,
- M. P. Chipperfield,
- M. Dalvi,
- G. A. Folberth,
- F. Dennison,
- F. Dennison,
- S. S. Dhomse,
- S. S. Dhomse,
- P. T. Griffiths,
- P. T. Griffiths,
- C. Hardacre,
- A. J. Hewitt,
- R. S. Hill,
- C. E. Johnson,
- J. Keeble,
- J. Keeble,
- M. O. Köhler,
- M. O. Köhler,
- M. O. Köhler,
- O. Morgenstern,
- J. P. Mulcahy,
- C. Ordóñez,
- C. Ordóñez,
- R. J. Pope,
- R. J. Pope,
- S. T. Rumbold,
- M. R. Russo,
- M. R. Russo,
- N. H. Savage,
- A. Sellar,
- M. Stringer,
- S. T. Turnock,
- O. Wild,
- G. Zeng
Affiliations
- A. T. Archibald
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- A. T. Archibald
- NCAS-Climate, University of Cambridge, CB2 1EW, UK
- F. M. O'Connor
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- N. L. Abraham
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- N. L. Abraham
- NCAS-Climate, University of Cambridge, CB2 1EW, UK
- S. Archer-Nicholls
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- M. P. Chipperfield
- School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
- M. P. Chipperfield
- National Centre for Earth Observation (NCEO), University of Leeds, Leeds, UK
- M. Dalvi
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- G. A. Folberth
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- F. Dennison
- National Institute of Water & Atmospheric Research Ltd (NIWA), 301 Evans Bay Parade, Greta Point, Wellington, New Zealand
- F. Dennison
- now at: CSIRO Oceans and Atmosphere, Aspendale, Australia
- S. S. Dhomse
- School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
- S. S. Dhomse
- National Centre for Earth Observation (NCEO), University of Leeds, Leeds, UK
- P. T. Griffiths
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- P. T. Griffiths
- NCAS-Climate, University of Cambridge, CB2 1EW, UK
- C. Hardacre
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- A. J. Hewitt
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- R. S. Hill
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- C. E. Johnson
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- J. Keeble
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- J. Keeble
- NCAS-Climate, University of Cambridge, CB2 1EW, UK
- M. O. Köhler
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- M. O. Köhler
- Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
- M. O. Köhler
- now at ECMWF, Reading, UK
- O. Morgenstern
- National Institute of Water & Atmospheric Research Ltd (NIWA), 301 Evans Bay Parade, Greta Point, Wellington, New Zealand
- J. P. Mulcahy
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- C. Ordóñez
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- C. Ordóñez
- now at: Departamento de Física de la Tierra y Astrofísica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid 28040, Spain
- R. J. Pope
- School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
- R. J. Pope
- National Centre for Earth Observation (NCEO), University of Leeds, Leeds, UK
- S. T. Rumbold
- NCAS-Climate, Department of Meteorology, University of Reading, Reading, RG6 6BB, UK
- M. R. Russo
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
- M. R. Russo
- NCAS-Climate, University of Cambridge, CB2 1EW, UK
- N. H. Savage
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- A. Sellar
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- M. Stringer
- NCAS-Climate, Department of Meteorology, University of Reading, Reading, RG6 6BB, UK
- S. T. Turnock
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- O. Wild
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK
- G. Zeng
- National Institute of Water & Atmospheric Research Ltd (NIWA), 301 Evans Bay Parade, Greta Point, Wellington, New Zealand
- DOI
- https://doi.org/10.5194/gmd-13-1223-2020
- Journal volume & issue
-
Vol. 13
pp. 1223 – 1266
Abstract
Here we present a description of the UKCA StratTrop chemical mechanism, which is used in the UKESM1 Earth system model for CMIP6. The StratTrop chemical mechanism is a merger of previously well-evaluated tropospheric and stratospheric mechanisms, and we provide results from a series of bespoke integrations to assess the overall performance of the model. We find that the StratTrop scheme performs well when compared to a wide array of observations. The analysis we present here focuses on key components of atmospheric composition, namely the performance of the model to simulate ozone in the stratosphere and troposphere and constituents that are important for ozone in these regions. We find that the results obtained for tropospheric ozone and its budget terms from the use of the StratTrop mechanism are sensitive to the host model; simulations with the same chemical mechanism run in an earlier version of the MetUM host model show a range of sensitivity to emissions that the current model does not fall within. Whilst the general model performance is suitable for use in the UKESM1 CMIP6 integrations, we note some shortcomings in the scheme that future targeted studies will address.
