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UMUKCA-UCAM model data, part of the Chemistry-Climate Model Initiative (CCMI-1) project database

Latest Data Update: 2016-07-04
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2021-03-10
Download Stats: last 12 months
Dataset Size: 1.06K Files | 61GB


Data from the University of Cambridge - United Kingdom Chemistry and Aerosol model (UMUKCA-UCAM) , part of the International Global Atmospheric Chemistry (IGAC)/ Stratosphere-troposphere Processes and their Role in Climate (SPARC) Chemistry-Climate Model Initiative phase 1 (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 reference experiments: ref-C1, ref-C1SD and ref-C2.

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.

Citable as:  Abraham, N.L.; Archibald, A.; Currie, R.; Pyle, J.A. (2021): UMUKCA-UCAM model data, part of the Chemistry-Climate Model Initiative (CCMI-1) project database. Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: IGAC, SPARC, WCRP, UMUKCA-UCAM, CCMI-1, ref-C1, ref-C1SD, ref-C2


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: 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.
File Format:

Process overview

This dataset was generated by the computation detailed below.



University of Cambridge - United Kingdom Chemistry and Aerosol model (UMUKCA-UCAM)

Input Description


Output Description


Software Reference


  • units: K
  • standard_name: air_temperature
  • var_id: ta
  • long_name: Air Temperature
  • names: air_temperature, Air Temperature
  • units: year
  • standard_name: age_of_stratospheric_air
  • long_name: Alternate Stratospheric Age of Air
  • var_id: altaoa
  • names: age_of_stratospheric_air, Alternate Stratospheric Age of Air
  • units: m2
  • long_name: Atmosphere Grid-Cell Area
  • standard_name: cell_area
  • var_id: areacella
  • names: Atmosphere Grid-Cell Area, cell_area
  • long_name: CH4 Volume Mixing Ratio
  • standard_name: mole_fraction_of_methane_in_air
  • var_id: vmrch4
  • units: mole mole-1
  • names: CH4 Volume Mixing Ratio, mole_fraction_of_methane_in_air
  • long_name: CO Volume Mixing Ratio
  • standard_name: mole_fraction_of_carbon_monoxide_in_air
  • var_id: vmrco
  • units: mole mole-1
  • names: CO Volume Mixing Ratio, mole_fraction_of_carbon_monoxide_in_air
  • units: m s-1
  • standard_name: eastward_wind
  • var_id: ua
  • long_name: Eastward Wind
  • names: eastward_wind, Eastward Wind
  • units: m
  • standard_name: geopotential_height
  • var_id: zg
  • long_name: Geopotential Height
  • names: geopotential_height, Geopotential Height
  • standard_name: mole_fraction_of_hydrogen_chloride_in_air
  • units: mole mole-1
  • long_name: HCl Volume Mixing Ratio
  • var_id: vmrhcl
  • names: mole_fraction_of_hydrogen_chloride_in_air, HCl Volume Mixing Ratio
  • long_name: HNO3 Volume Mixing Ratio
  • standard_name: mole_fraction_of_nitric_acid_in_air
  • var_id: vmrhno3
  • units: mole mole-1
  • names: mole_fraction_of_nitric_acid_in_air, HNO3 Volume Mixing Ratio
  • units: %
  • long_name: Land Area Fraction
  • standard_name: land_area_fraction
  • var_id: sftlf
  • names: land_area_fraction, Land Area Fraction
  • units: K s-1
  • standard_name: tendency_of_air_temperature_due_to_longwave_heating
  • long_name: Longwave Heating Rate
  • var_id: tntlw
  • names: tendency_of_air_temperature_due_to_longwave_heating, Longwave Heating Rate
  • units: mole mole-1
  • standard_name: mole_fraction_of_nitrous_oxide_in_air
  • long_name: N2O Volume Mixing Ratio
  • var_id: vmrn2o
  • names: mole_fraction_of_nitrous_oxide_in_air, N2O Volume Mixing Ratio
  • long_name: NO Volume Mixing Ratio
  • standard_name: mole_fraction_of_nitrogen_monoxide_in_air
  • var_id: vmrno
  • units: mole mole-1
  • names: NO Volume Mixing Ratio, mole_fraction_of_nitrogen_monoxide_in_air
  • units: m s-1
  • standard_name: northward_wind
  • var_id: va
  • long_name: Northward Wind
  • names: northward_wind, Northward Wind
  • long_name: OH Volume Mixing Ratio
  • standard_name: mole_fraction_of_hydroxyl_radical_in_air
  • var_id: vmroh
  • units: mole mole-1
  • names: OH Volume Mixing Ratio, mole_fraction_of_hydroxyl_radical_in_air
  • standard_name: mole_fraction_of_ozone_in_air
  • var_id: vmro3
  • units: mole mole-1
  • long_name: Ozone Volume Mixing Ratio
  • names: mole_fraction_of_ozone_in_air, Ozone Volume Mixing Ratio
  • var_id: pr
  • units: kg m-2 s-1
  • standard_name: precipitation_flux
  • long_name: Precipitation
  • names: precipitation_flux, Precipitation
  • units: K s-1
  • standard_name: tendency_of_air_temperature_due_to_shortwave_heating
  • long_name: Shortwave Heating Rate
  • var_id: tntsw
  • names: tendency_of_air_temperature_due_to_shortwave_heating, Shortwave Heating Rate
  • units: Pa
  • standard_name: surface_air_pressure
  • var_id: ps
  • long_name: Surface Air Pressure
  • names: surface_air_pressure, Surface Air Pressure
  • units: m
  • long_name: Surface Altitude
  • standard_name: surface_altitude
  • var_id: orog
  • names: Surface Altitude, surface_altitude
  • var_id: rlutcs
  • units: W m-2
  • standard_name: toa_outgoing_longwave_flux_assuming_clear_sky
  • long_name: TOA Outgoing Clear-Sky Longwave Radiation
  • names: toa_outgoing_longwave_flux_assuming_clear_sky, 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
  • names: toa_outgoing_shortwave_flux_assuming_clear_sky, TOA Outgoing Clear-Sky Shortwave Radiation
  • var_id: rlut
  • units: W m-2
  • standard_name: toa_outgoing_longwave_flux
  • long_name: TOA Outgoing Longwave Radiation
  • names: toa_outgoing_longwave_flux, TOA Outgoing Longwave Radiation
  • var_id: rsut
  • units: W m-2
  • standard_name: toa_outgoing_shortwave_flux
  • long_name: TOA Outgoing Shortwave Radiation
  • names: toa_outgoing_shortwave_flux, TOA Outgoing Shortwave Radiation
  • units: %
  • standard_name: cloud_area_fraction
  • var_id: clt
  • long_name: Total Cloud Fraction
  • names: cloud_area_fraction, Total Cloud Fraction
  • long_name: Total Ozone Column
  • units: DU
  • var_id: toz
  • standard_name: equivalent_thickness_at_stp_of_atmosphere_ozone_content
  • names: Total Ozone Column, equivalent_thickness_at_stp_of_atmosphere_ozone_content
  • units: Pa
  • long_name: Tropopause Air Pressure
  • standard_name: tropopause_air_pressure
  • var_id: ptp
  • names: Tropopause Air Pressure, tropopause_air_pressure
  • units: K
  • long_name: Tropopause Air Temperature
  • standard_name: tropopause_air_temperature
  • var_id: tatp
  • names: Tropopause Air Temperature, tropopause_air_temperature
  • units: m
  • standard_name: tropopause_altitude
  • long_name: Tropopause Altitude
  • var_id: ztp
  • names: tropopause_altitude, Tropopause Altitude
  • standard_name: mole_fraction_of_water_vapor_in_air
  • units: mole mole-1
  • long_name: Water Vapour Volume Mixing Ratio
  • var_id: vmrh2o
  • names: mole_fraction_of_water_vapor_in_air, Water Vapour Volume Mixing Ratio
  • units: Pa
  • standard_name: air_pressure
  • var_id: plev
  • names: air_pressure
  • var_id: lat_bnds
  • var_id: latitude_longitude
  • var_id: lon_bnds
  • var_id: plev_bnds
  • var_id: time_bnds

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • names: latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • names: longitude
  • standard_name: time
  • var_id: time
  • names: time
Temporal Range
Start time:
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Geographic Extent