Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere
<p>The UK Chemistry and Aerosols (UKCA) model is a new aerosol-chemistry model coupled to the Met Office Unified Model capable of simulating composition and climate from the troposphere to the mesosphere. Here we introduce the model and assess its performance with a particular focus on the str...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
European Geosciences Union
2009
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| Subjects: |
| _version_ | 1826297363218563072 |
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| author | Morgenstern, O Braesicke, P O'Connor, F Bushell, A Johnson, C Osprey, S Pyle, J |
| author_facet | Morgenstern, O Braesicke, P O'Connor, F Bushell, A Johnson, C Osprey, S Pyle, J |
| author_sort | Morgenstern, O |
| collection | OXFORD |
| description | <p>The UK Chemistry and Aerosols (UKCA) model is a new aerosol-chemistry model coupled to the Met Office Unified Model capable of simulating composition and climate from the troposphere to the mesosphere. Here we introduce the model and assess its performance with a particular focus on the stratosphere. A 20-year perpetual year-2000 simulation forms the basis of our analysis. We assess basic and derived dynamical and chemical model fields and compare to ERA-40 reanalyses and satellite climatologies. Polar temperatures and the lifetime of the southern polar vortex are well captured, indicating that the model is suitable for assessing the ozone hole. Ozone and long-lived tracers compare favourably to observations. Chemical-dynamical coupling, as evidenced by the anticorrelation between winter-spring northern polar ozone columns and the strength of the polar jet, is also well captured. Remaining problems relate to a warm bias at the tropical tropopause, slow ascent in the tropical pipe with implications for the lifetimes of long-lived species, and a general overestimation of ozone columns in middle and high latitudes.</p> |
| first_indexed | 2024-03-07T04:30:27Z |
| format | Journal article |
| id | oxford-uuid:ce1f8d5e-6d91-417e-91f3-f63afa40f2b7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:30:27Z |
| publishDate | 2009 |
| publisher | European Geosciences Union |
| record_format | dspace |
| spelling | oxford-uuid:ce1f8d5e-6d91-417e-91f3-f63afa40f2b72022-03-27T07:33:35ZEvaluation of the new UKCA climate-composition model - Part 1: The stratosphereJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ce1f8d5e-6d91-417e-91f3-f63afa40f2b7PhysicsAtmospheric chemistryAtmospheric, Oceanic, and Planetary physicsChemistry and allied sciencesEnglishSymplectic Elements at OxfordEuropean Geosciences Union2009Morgenstern, OBraesicke, PO'Connor, FBushell, AJohnson, COsprey, SPyle, J<p>The UK Chemistry and Aerosols (UKCA) model is a new aerosol-chemistry model coupled to the Met Office Unified Model capable of simulating composition and climate from the troposphere to the mesosphere. Here we introduce the model and assess its performance with a particular focus on the stratosphere. A 20-year perpetual year-2000 simulation forms the basis of our analysis. We assess basic and derived dynamical and chemical model fields and compare to ERA-40 reanalyses and satellite climatologies. Polar temperatures and the lifetime of the southern polar vortex are well captured, indicating that the model is suitable for assessing the ozone hole. Ozone and long-lived tracers compare favourably to observations. Chemical-dynamical coupling, as evidenced by the anticorrelation between winter-spring northern polar ozone columns and the strength of the polar jet, is also well captured. Remaining problems relate to a warm bias at the tropical tropopause, slow ascent in the tropical pipe with implications for the lifetimes of long-lived species, and a general overestimation of ozone columns in middle and high latitudes.</p> |
| spellingShingle | Physics Atmospheric chemistry Atmospheric, Oceanic, and Planetary physics Chemistry and allied sciences Morgenstern, O Braesicke, P O'Connor, F Bushell, A Johnson, C Osprey, S Pyle, J Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere |
| title | Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere |
| title_full | Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere |
| title_fullStr | Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere |
| title_full_unstemmed | Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere |
| title_short | Evaluation of the new UKCA climate-composition model - Part 1: The stratosphere |
| title_sort | evaluation of the new ukca climate composition model part 1 the stratosphere |
| topic | Physics Atmospheric chemistry Atmospheric, Oceanic, and Planetary physics Chemistry and allied sciences |
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