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CCMI-2022: REF-D1 data produced by the NIWA-UKCA2 model at NIWA

Latest Data Update: 2021-08-05
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2021-08-06
Download Stats: last 12 months
Dataset Size: 408 Files | 149GB


This dataset contains model data for CCMI-2022 experiment refD1 produced by the NIWA-UKCA2 chemistry-climate model run by the modelling team at NIWA (National Institute of Water and Atmospheric Research) in New Zealand.

The refD1 experiment is a hindcast of the atmospheric state, using a prescribed evolution of sea surface temperature and sea ice from observations along with forcings for the extra-terrestrial solar flux, long-lived greenhouse gases and ozone depleting substances, stratospheric aerosols and an imposed quasi-biennial oscillation that approximate the observed variations over the historical period to the fullest extent possible.

The CCMI-2022 Chemistry-climate model initiative is a set of model experiments focused on the stratosphere, with the goals of providing updated projections towards the future evolution of the ozone layer and improving our understanding of chemistry-climate interactions from models.

Sources of additional information
The following web links are provided in the Details/Docs section of this catalogue record:
- Review of the global models used within phase 1 of the Chemistry-Climate Model Initiative (CCMI)
- A new set of Chemistry-Climate Model Initiative (CCMI) Community Simulations to Update the Assessment of Models and Support Upcoming Ozone Assessment Activities, David Plummer and Tatsuya Nagashima and Simone Tilmes and Alex Archibald and Gabriel Chiodo and Suvarna Fadnavis and Hella Garny and Beatrice Josse and Joowan Kim and Jean-Francois Lamarque and Olaf Morgenstern and Lee Murray and Clara Orbe and Amos Tai and Martyn Chipperfield and Bernd Funke and Martin Juckes and Doug Kinnison and Markus Kunze and Beiping Luo and Katja Matthes and Paul A. Newman and Charlotte Pascoe and Thomas Peter (2021), SPARC Newsletter, volume 57, pp 22-30

Citable as:  Morgenstern, O.; Zeng, G. (2021): CCMI-2022: REF-D1 data produced by the NIWA-UKCA2 model at NIWA. NERC EDS Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: CCMI-2022, REF-D1, refD1, Hindcast, NIWA-UKCA, NIWA


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Restricted data: please submit an application using the REQUEST ACCESS link for 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:

These data are original data produced by NIWA-UKCA2, processed into CF-compliant NetCDF3 format. In a further step, the data has been processed using nccopy into compressed NetCDF4 format. Uploaded using rsync.

Data Quality:
Data are as given by the data provider, ceda-cc quality control has been performed by the Centre for Environmental Data Analysis (CEDA)
File Format:

Process overview

This dataset was generated by the computation detailed below.

NIWA-UKCA2 deployed at NIWA


NIWA-UKCA2 deployed at NIWA

Input Description


Output Description


Software Reference


  • units: Pa
  • standard_name: air_pressure
  • long_name: Air Pressure
  • var_id: pa
  • units: K
  • standard_name: air_temperature
  • var_id: ta
  • long_name: Air Temperature
  • units: K
  • standard_name: air_temperature
  • var_id: ta1000
  • long_name: Air Temperature at 1000hPa
  • units: K
  • standard_name: air_temperature
  • var_id: ta100
  • long_name: Air Temperature at 100hPa
  • standard_name: mole_fraction_of_methyl_bromide_in_air
  • long_name: CH3Br Volume Mixing Ratio
  • var_id: ch3br
  • units: mol mol-1
  • standard_name: mole_fraction_of_methyl_hydroperoxide_in_air
  • long_name: CH3OOH Volume Mixing Ratio
  • units: mol mol-1
  • var_id: ch3ooh
  • long_name: CO Volume Mixing Ratio
  • standard_name: mole_fraction_of_carbon_monoxide_in_air
  • var_id: co
  • units: mol mol-1
  • var_id: cl
  • standard_name: mole_fraction_of_atomic_chlorine_in_air
  • units: mol mol-1
  • long_name: Cl Volume Mixing Ratio
  • units: kg m-2 s-1
  • var_id: mcu
  • standard_name: atmosphere_updraft_convective_mass_flux
  • long_name: Convective Updraft Mass Flux
  • units: m s-1
  • standard_name: eastward_wind
  • var_id: ua10
  • long_name: Eastward Wind at 10hPa
  • units: m
  • standard_name: geopotential_height
  • var_id: zg1000
  • long_name: Geopotential Height at 1000hPa
  • standard_name: mole_fraction_of_molecular_hydrogen_in_air
  • long_name: H2 Volume Mixing Ratio
  • units: mol mol-1
  • var_id: h2
  • standard_name: mole_fraction_of_hydrogen_peroxide_in_air
  • long_name: H2O2 Volume Mixing Ratio
  • units: mol mol-1
  • var_id: h2o2
  • standard_name: mole_fraction_of_hydrogen_bromide_in_air
  • long_name: HBr Volume Mixing Ratio
  • units: mol mol-1
  • var_id: hbr
  • standard_name: mole_fraction_of_hydrogen_chloride_in_air
  • long_name: HCl Volume Mixing Ratio
  • units: mol mol-1
  • var_id: hcl
  • long_name: HNO3 Volume Mixing Ratio
  • standard_name: mole_fraction_of_nitric_acid_in_air
  • units: mol mol-1
  • var_id: hno3
  • standard_name: mole_fraction_of_hypobromous_acid_in_air
  • long_name: HOBr Volume Mixing Ratio
  • units: mol mol-1
  • var_id: hobr
  • long_name: Mean Age of Stratospheric Air
  • standard_name: age_of_stratospheric_air
  • units: yr
  • var_id: meanage
  • standard_name: mole_fraction_of_methane_in_air
  • long_name: Mole Fraction of CH4
  • var_id: ch4
  • units: mol mol-1
  • standard_name: mole_fraction_of_nitrous_oxide_in_air
  • long_name: Mole Fraction of N2O
  • var_id: n2o
  • units: mol mol-1
  • standard_name: mole_fraction_of_ozone_in_air
  • long_name: Mole Fraction of O3
  • units: mol mol-1
  • var_id: o3
  • standard_name: mole_fraction_of_water_vapor_in_air
  • var_id: h2o
  • units: mol mol-1
  • long_name: Mole Fraction of Water Vapor
  • standard_name: mole_fraction_of_atomic_nitrogen_in_air
  • var_id: n
  • units: mol mol-1
  • long_name: N Volume Mixing Ratio
  • units: K
  • standard_name: air_temperature
  • var_id: tas
  • long_name: Near-Surface Air Temperature
  • long_name: OH Volume Mixing Ratio
  • standard_name: mole_fraction_of_hydroxyl_radical_in_air
  • units: mol mol-1
  • var_id: oh
  • units: Pa s-1
  • standard_name: lagrangian_tendency_of_air_pressure
  • var_id: wap
  • long_name: Omega (=dp/dt)
  • var_id: pr
  • units: kg m-2 s-1
  • standard_name: precipitation_flux
  • long_name: Precipitation
  • units: mol mol-1
  • long_name: Stratospheric Ozone Tracer Volume Mixing Ratio
  • var_id: o3strat
  • units: W m-2
  • standard_name: surface_downwelling_shortwave_flux_in_air
  • var_id: rsds
  • long_name: Surface Downwelling Shortwave Radiation
  • var_id: rlut
  • units: W m-2
  • standard_name: toa_outgoing_longwave_flux
  • long_name: TOA Outgoing Longwave Radiation
  • units: m
  • var_id: toz
  • long_name: Total Column Ozone
  • standard_name: equivalent_thickness_at_stp_of_atmosphere_ozone_content
  • units: mol mol-1
  • long_name: Total Inorganic Bromine Volume Mixing Ratio
  • standard_name: mole_fraction_of_inorganic_bromine_in_air
  • var_id: bry
  • standard_name: mole_fraction_of_inorganic_chlorine_in_air
  • units: mol mol-1
  • long_name: Total Inorganic Chlorine Volume Mixing Ratio
  • var_id: cly
  • units: K
  • long_name: Tropopause Air Temperature
  • standard_name: tropopause_air_temperature
  • var_id: tatp
  • var_id: alev_bnds
  • units: m
  • standard_name: height
  • var_id: height
  • long_name: height
  • units: m
  • standard_name: hybrid_height
  • var_id: alev
  • long_name: hybrid height
  • var_id: lat_bnds
  • var_id: lon_bnds
  • var_id: plev_bnds
  • units: Pa
  • standard_name: air_pressure
  • long_name: pressure
  • var_id: plev
  • var_id: time_bnds

Co-ordinate Variables

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