Dataset
University of Leeds UMSLIMCAT model data, part of the Chemistry-Climate Model Initiative (CCMI-1) project database
Abstract
Data from the University of Leeds UMSLIMCAT model, part of the International Global Atmospheric Chemistry (IGAC)/ Stratosphere-troposphere Processes and their Role in Climate (SPARC) Chemistry-Climate Model Initiative (CCMI-1).
CCMI-1 is a global chemistry climate model intercomparison project, coordinated by the University of Reading on behalf of the World Climate Research Programme (WCRP).
The dataset includes data for the following CCMI-1 experiments:
Reference experiments ref-C1, ref-C1SD and ref-C2.
Sensitivity experiments senC1SSI, senC2fGHG, senC2fODS, senC2fODS2000, senC2rcp45 and senC2rcp85.
ref-C1: Using state-of-knowledge historic forcings and observed sea surface conditions, the models simulate the recent past (1960–2010).
ref-C1SD: Similar to ref-C1 but the models are nudged towards reanalysis datasets, and correspondingly the simulations only cover 1980–2010. (“SD” stands for specified dynamics.)
ref-C2: Simulations spanning the period 1960–2100. The experiments follow the WMO (2011) A1 baseline scenario for ozone depleting substances and the RCP 6.0 (Meinshausen et al., 2011) for other greenhouse gases, tropospheric ozone (O3) precursors, and aerosol and aerosol precursor emissions.
senC1SSI: The same as ref-C1 but using a solar forcing dataset with increased UV intensity.
senC2fGHG: Similar to ref-C2 but with greenhouse gasses (GHGs) fixed at their 1960 levels, and sea surface and sea ice conditions prescribed as the 1955–1964 average (where these conditions are imposed).
senC2fODS: The same as ref-C2 but with ozone-depleting (halogenated) substances (ODSs) fixed at their 1960 levels.
senC2fODS2000: The same as ref-C2 but with ODSs fixed at their year 2000 levels.
senC2rcp45: The same as ref-C2, but with the GHG scenario changed to RCP 4.5 (Meinshausen et al., 2011).
senC2rcp85: The same as ref-C2, but with the GHG scenario changed to RCP 8.5 (Meinshausen et al., 2011).
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.
Use of these data is covered by the following licence(s): http://creativecommons.org/licenses/by/4.0/ When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
The CCMI-1 model output uses CMOR to convert data to CF netCDF. The CMOR conversion is performed by the individual modelling groups and the resulting CF netCDF files are archived at the BADC. |
| Data Quality: |
Data passed CCMI-1 metadata consistency checks.
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| File Format: |
NetCDF
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Related Documents
Process overview
| Title | UMSLIMCAT chemistry-climate model |
| Abstract | UMSLIMCAT is a coupled chemistry-climate model (CCM) which combines the Met Office Unified Model (UM) v4.5 with the well-established TOMCAT / SLIMCAT stratospheric chemistry scheme. The model is designed to study the long-term changes in stratospheric ozone due to changes in chemical composition and greenhouse gas loading. The Met Office UM is a hydrostatic, primitive-equation, grid-point atmospheric general-circulation model (GCM) with a hybrid vertical coordinate. Different versions of the UM exist but UMSLIMCAT is based on the ‘climate’ version v4.5 L64. The model has a horizontal resolution of 2.5◦ latitude × 3.75◦ longitude and 64 vertical levels from the surface to 0.01 hPa (approximately 80 km). The vertical resolution in the stratosphere is ∼1.3 km. This version of the UM uses the orographic gravity-wave drag scheme from the surface to 20 hPa. The scheme accounts for the anisotropy of sub-grid orography in the calculation of the surface stress. Above 20 hPa, non-orographic gravity-wave drag is represented by a Rayleigh friction term. UMSLIMCAT uses sea-surface temperatures (SSTs) from observations or ocean model output. UMSLIMCAT uses the radiation scheme of Edwards and Slingo with some modifications in the middle atmosphere. This scheme treats absorption by the gases CO2, H2O, O3, N2O, CH4, CFC-11 (CFCl3), and CFC-12(CF 2 Cl2). In the standard UM, these gases are specified by climatological values, though certain UMSLIMCAT simulations can generally use interactively calculated profiles. In UMSLIMCAT the v4.5 UM’s default tracer advection scheme has been replaced by the QUINTIC-MONO scheme. This scheme performs much better in maintaining realistic tracer distributions in the presence of strong gradients. The UMSLIMCAT coupled chemistry version of the UM takes the full stratospheric chemistry modules from the TOMCAT/SLIMCAT off-line 3D chemical transport model (CTM). This scheme is both comprehensive and computationally efficient. The scheme contains all of the Ox, NOy, Cly, Bry and HOx species believed to be important to describe stratospheric chemistry. The scheme also includes a detailed CH4 oxidation scheme and a range of long-lived source gases. During the model simulations, the abundance of the three halogen-containing source gases (CFCl3, CF2Cl2 and CH3Br) are scaled to give the required chlorine/bromine loading (to account for the contributions from source gases not considered). The scheme uses 28 advected tracers in the UM (including a ‘passive’ Ox tracer to diagnose polar ozone loss). |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- units: K
- standard_name: air_temperature
- var_id: ta
- long_name: Air Temperature
- units: K
- standard_name: air_temperature
- long_name: Air Temperature at 1000 hPa
- var_id: ta1000
- units: K
- standard_name: air_temperature
- long_name: Air Temperature at 30 hPa
- var_id: ta30
- units: K
- standard_name: air_temperature
- long_name: Air Temperature at 50 hPa
- var_id: ta50
- units: K
- standard_name: air_temperature
- var_id: ta100
- long_name: Air Temperature at 70 hPa
- units: mole mole-1
- long_name: CH3CCl3 Volume Mixing Ratio
- standard_name: mole_fraction_of_hcc140a_in_air
- var_id: vmrch3ccl3
- long_name: CH4 Volume Mixing Ratio
- standard_name: mole_fraction_of_methane_in_air
- var_id: vmrch4
- units: mole mole-1
- long_name: CO Volume Mixing Ratio
- standard_name: mole_fraction_of_carbon_monoxide_in_air
- var_id: vmrco
- units: mole mole-1
- units: m s-1
- standard_name: eastward_wind
- var_id: ua
- long_name: Eastward Wind
- units: m s-1
- standard_name: eastward_wind
- long_name: Eastward Wind at 1000 hPa
- var_id: ua1000
- units: m s-1
- standard_name: eastward_wind
- long_name: Eastward Wind at 500 hPa
- var_id: ua500
- units: m s-1
- standard_name: eastward_wind
- var_id: ua100
- long_name: Eastward Wind at 70 hPa
- units: m s-1
- standard_name: eastward_wind
- long_name: Eastward Wind at 850 hPa
- var_id: ua850
- units: m
- standard_name: geopotential_height
- var_id: zg
- long_name: Geopotential Height
- units: m
- standard_name: geopotential_height
- long_name: Geopotential Height at 1000 hPa
- var_id: zg1000
- units: m
- standard_name: geopotential_height
- long_name: Geopotential Height at 500 hPa
- var_id: zg500
- units: m
- standard_name: geopotential_height
- var_id: zg100
- long_name: Geopotential Height at 70 hPa
- standard_name: mole_fraction_of_hydrogen_chloride_in_air
- units: mole mole-1
- long_name: HCl Volume Mixing Ratio
- var_id: vmrhcl
- long_name: HNO3 Volume Mixing Ratio
- standard_name: mole_fraction_of_nitric_acid_in_air
- var_id: vmrhno3
- units: mole mole-1
- units: mole mole-1
- standard_name: mole_fraction_of_nitrous_oxide_in_air
- long_name: N2O Volume Mixing Ratio
- var_id: vmrn2o
- units: m s-1
- standard_name: northward_wind
- var_id: va
- long_name: Northward Wind
- units: m s-1
- standard_name: northward_wind
- long_name: Northward Wind at 1000 hPa
- var_id: va1000
- units: m s-1
- standard_name: northward_wind
- long_name: Northward Wind at 50 hPa
- var_id: va50
- units: m s-1
- standard_name: northward_wind
- long_name: Northward Wind at 500 hPa
- var_id: va500
- units: m s-1
- standard_name: northward_wind
- var_id: va100
- long_name: Northward Wind at 70 hPa
- standard_name: mole_fraction_of_ozone_in_air
- var_id: vmro3
- units: mole mole-1
- long_name: Ozone Volume Mixing Ratio
- units: kg m-2 s-1
- standard_name: atmosphere_boundary_layer_thickness
- long_name: PBL Height
- var_id: zmpblz
- units: K m2 kg-1 s-1
- long_name: Potential Vorticity on 480K
- standard_name: ertel_potential_vorticity
- var_id: vorpot480
- units: K m2 kg-1 s-1
- standard_name: ertel_potential_vorticity
- long_name: Potential Vorticity on 840K
- var_id: pv840
- units: m
- standard_name: precipitation_flux
- long_name: Precipitation
- var_id: zmpr
- units: Pa
- standard_name: surface_air_pressure
- long_name: Surface Air Pressure
- var_id: zmps
- units: K
- standard_name: surface_temperature
- var_id: ts
- long_name: Surface Temperature
- var_id: rlutcs
- units: W m-2
- standard_name: toa_outgoing_longwave_flux_assuming_clear_sky
- long_name: TOA Outgoing Clear-Sky Longwave Radiation
- var_id: rsutcs
- units: W m-2
- standard_name: toa_outgoing_shortwave_flux_assuming_clear_sky
- long_name: TOA Outgoing Clear-Sky Shortwave Radiation
- units: W m-2
- standard_name: toa_outgoing_longwave_flux
- long_name: TOA Outgoing Longwave Radiation
- var_id: zmrlut
- var_id: rsut
- units: W m-2
- standard_name: toa_outgoing_shortwave_flux
- long_name: TOA Outgoing Shortwave Radiation
- units: mole mole-1
- standard_name: mole_fraction_of_total_inorganic_bromine_in_air
- var_id: zmbry
- long_name: Total Inorganic Bromine (Bry) Volume Mixing Ratio
- units: mole mole-1
- standard_name: mole_fraction_of_total_inorganic_bromine_in_air
- var_id: zmbry
- long_name: Total Inorganic Bromine (Bry) Volume Mixing Ratio
- var_id: zmcly
- units: mole mole-1
- standard_name: mole_fraction_of_total_inorganic_chlorine_in_air
- long_name: Total Inorganic Chlorine (Cly) Volume Mixing Ratio
- var_id: zmcly
- units: mole mole-1
- long_name: Total Inorganic Chlorine (Cly) Volume Mixing Ratio
- standard_name: mole_fraction_of_total_inorganic_chlorine_in_air
- units: mole mole-1
- var_id: zmnoy
- standard_name: mole_fraction_of_total_inorganic_nitrogen_in_air
- long_name: Total Inorganic Nitrogen (NOy) Volume Mixing Ratio
- units: mole mole-1
- var_id: zmnoy
- long_name: Total Inorganic Nitrogen (NOy) Volume Mixing Ratio
- standard_name: mole_fraction_of_total_inorganic_nitrogen_in_air
- long_name: Total Ozone Column
- units: DU
- var_id: toz
- standard_name: equivalent_thickness_at_stp_of_atmosphere_ozone_content
- units: mole mole-1
- standard_name: mole_fraction_of_total_reactive_nitrogen_in_air
- var_id: zmnoy
- long_name: Total Reactive Nitrogen (NOy) Volume Mixing Ratio
- units: mole mole-1
- standard_name: mole_fraction_of_total_reactive_nitrogen_in_air
- var_id: zmnoy
- long_name: Total Reactive Nitrogen (NOy) Volume Mixing Ratio
- units: DU
- standard_name: equivalent_thickness_at_stp_of_atmosphere_ozone_content
- long_name: Total_Ozone_Column
- var_id: zmtoz
- units: K
- long_name: Tropopause Air Temperature
- standard_name: tropopause_air_temperature
- var_id: zmtatp
- units: m
- standard_name: tropopause_altitude
- long_name: Tropopause Altitude
- var_id: zmztp
- units: Pa
- long_name: Tropopause Pressure
- standard_name: tropopause_pressure
- var_id: zmptp
- units: m s-1
- standard_name: upward_air_velocity
- long_name: Upward Air Velocity
- var_id: wa
- units: m s-1
- standard_name: upward_air_velocity
- long_name: Upward Wind at 50 hPa
- var_id: wa50
- units: m s-1
- standard_name: upward_air_velocity
- long_name: Upward Wind at 70 hPa
- var_id: wa70
- standard_name: mole_fraction_of_water_vapor_in_air
- units: mole mole-1
- var_id: vmrh2o
- long_name: Water Vapor Volume Mixing Ratio
- units: K
- standard_name: air_temperature
- var_id: zg
- long_name: Zonal Mean Air Temperature
- units: mole mole-1
- standard_name: mole_fraction_of_bromine_chloride_in_air
- var_id: zmbrcl
- long_name: Zonal Mean BrCl Volume Mixing Ratio
- units: mole mole-1
- standard_name: mole_fraction_of_bromine_nitrate_in_air
- long_name: Zonal Mean BrONO2 Volume Mixing Ratio
- var_id: zmbrono2
- standard_name: mole_fraction_of_formaldehyde_in_air
- units: mole mole-1
- long_name: Zonal Mean CH2O Volume Mixing Ratio
- var_id: zmch2o
- units: mole mole-1
- long_name: Zonal Mean CH3Br Volume Mixing Ratio
- standard_name: mole_fraction_of_methyl_bromide_in_air
- var_id: zmch3br
- standard_name: mole_fraction_of_methane_in_air
- long_name: Zonal Mean CH4 Volume Mixing Ratio
- var_id: zmch4
- units: mole mole-1
- standard_name: mole_fraction_of_carbon_monoxide_in_air
- units: mole mole-1
- long_name: Zonal Mean CO Volume Mixing Ratio
- var_id: zmco
- units: mole mole-1
- standard_name: mole_fraction_of_chlorine_nitrate_in_air
- long_name: Zonal Mean ClONO2 Volume Mixing Ratio
- var_id: zmclono2
- units: m s-1
- standard_name: eastward_wind
- var_id: ua
- long_name: Zonal Mean Eastward Wind
- units: m
- standard_name: geopotential_height
- var_id: ta
- long_name: Zonal Mean Geopotential Height
- units: mole mole-1
- standard_name: mole_fraction_of_hydrogen_peroxide_in_air
- long_name: Zonal Mean H2O2 Volume Mixing Ratio
- var_id: zmh2o2
- units: mole mole-1
- standard_name: mole_fraction_of_hydrogen_bromide_in_air
- long_name: Zonal Mean HBr Volume Mixing Ratio
- var_id: zmhbr
- long_name: Zonal Mean HCl Volume Mixing Ratio
- standard_name: mole_fraction_of_hydrogen_chloride_in_air
- var_id: zmhcl
- units: mole mole-1
- standard_name: mole_fraction_of_nitric_acid_in_air
- units: mole mole-1
- long_name: Zonal Mean HNO3 Volume Mixing Ratio
- var_id: zmhno3
- units: mole mole-1
- long_name: Zonal Mean HNO4 Volume Mixing Ratio
- standard_name: mole_fraction_of_peroxynitric_acid_in_air
- var_id: zmhno4
- units: mole mole-1
- standard_name: mole_fraction_of_hypobromous_acid_in_air
- long_name: Zonal Mean HOBr Volume Mixing Ratio
- var_id: zmhobr
- units: mole mole-1
- standard_name: mole_fraction_of_hypochlorous_acid_in_air
- long_name: Zonal Mean HOCl Volume Mixing Ratio
- var_id: zmhocl
- units: years
- standard_name: age_of_stratospheric_air
- long_name: Zonal Mean Mean Age of Stratospheric Air
- var_id: zmmnstrage
- units: mole mole-1
- standard_name: mole_fraction_of_nitrous_oxide_in_air
- long_name: Zonal Mean N2O Volume Mixing Ratio
- var_id: zmn2o
- units: mole mole-1
- standard_name: mole_fraction_of_dinitrogen_pentoxide_in_air
- long_name: Zonal Mean N2O5 Volume Mixing Ratio
- var_id: zmn2o5
- units: mole mole-1
- long_name: Zonal Mean NO3 Volume Mixing Ratio
- standard_name: mole_fraction_of_nitroge_dioxide_in_air
- var_id: zmno3
- units: m s-1
- standard_name: northward_wind
- var_id: va
- long_name: Zonal Mean Northward Wind
- units: mole mole-1
- standard_name: mole_fraction_of_chlorine_dioxide_in_air
- long_name: Zonal Mean OClO Volume Mixing Ratio
- var_id: zmoclo
- standard_name: mole_fraction_of_ozone_in_air
- var_id: zmo3
- units: mole mole-1
- long_name: Zonal Mean Ozone Volume Mixing Ratio
- units: mole mole-1
- long_name: Zonal Mean Total Inorganic Bromine (Bry) Volume Mixing Ratio
- standard_name: mole_fraction_of_total_inorganic_bromine_in_air
- var_id: zmbry
- var_id: zmcly
- units: mole mole-1
- standard_name: mole_fraction_of_inorganic_chlorine_in_air
- long_name: Zonal Mean Total Inorganic Chlorine (Cly) Volume Mixing Ratio
- units: mole mole-1
- long_name: Zonal Mean Total Reactive Nitrogen (NOy) Volume Mixing Ratio
- standard_name: mole_fraction_of_total_reactive_nitrogen_in_air
- var_id: zmnoy
- units: m s-1
- standard_name: upward_air_velocity
- var_id: wa
- long_name: Zonal Mean Upward Air Velocity
- standard_name: mole_fraction_of_water_vapor_in_air
- var_id: zmh2o
- units: mole mole-1
- long_name: Zonal Mean Water Vapor Volume Mixing Ratio
- var_id: lat_bnds
- long_name: lat_bnds
- standard_name: lat_bnds
- var_id: lon_bnds
- long_name: lon_bnds
- standard_name: lon_bnds
- units: Pa
- standard_name: air_pressure
- long_name: pressure
- var_id: plev
- units: days
- var_id: time_bnds
- long_name: time_bnds
Co-ordinate Variables
- units: degrees_north
- standard_name: latitude
- long_name: latitude
- var_id: lat
- units: degrees_east
- standard_name: longitude
- long_name: longitude
- var_id: lon
- long_name: time
- standard_name: time
- var_id: time
- units: days
Temporal Range
1960-01-01T00:00:00
2100-12-31T23:59:59
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
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-90.0000° |