This website uses cookies. By continuing to use this website you are agreeing to our use of cookies. 



Model data of sulphate aerosols, aerosol size distribution and radiative fluxes produced using different values of cloud-water pH

Update Frequency: Not Planned
Latest Data Update: 2019-02-19
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2019-02-25
DOI Publication Date: 2019-02-25
Download Stats: last 12 months
Dataset Size: 22 Files | 2GB


This dataset contains model output data on sulphate aerosols, aerosol size distributions and radiative fluxes produced from experiments that used different values of cloud-water pH. The composition-climate model HadGEM3-UKCA was run over the period 1970 to 2009 to investigate the effect of temporal changes in cloud-water pH on sulphate aerosol formation and the subsequent impact on climate. HadGEM3-UKCA is the climate model configuration of the Met Office Unified Model (UM). Vn7.3 of the UM was used in this study and included a branch to the CLOMAP-Mode aerosol scheme. Model simulations were conducted at a global resolution of 1.875° x 1.25°.

Citable as:  Turnock, S.; Mann, G.; Woodhouse, M.; Dalvi, M.; O'Connor, F.; Carslaw, K.; Spracklen, D. (2019): Model data of sulphate aerosols, aerosol size distribution and radiative fluxes produced using different values of cloud-water pH. Centre for Environmental Data Analysis, 25 February 2019. doi:10.5285/35e6cc3ca2314dcd8d627d85e6c01d46.
Abbreviation: Not defined
Keywords: sulphate aerosols, aerosol size distribution, radiative fluxes, cloud, pH


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:

Data were generated using the Met Office Unified Model (UM) Vn7.3 and used in a climate model configuration termed HadGEM3-UKCA that has interactive aerosols (GLOMAP-Mode) and chemistry at a global 140km horizontal resolution (N96, 1.875 x 1.25). Selected model output variables have been processed and converted to CF-netCDF by the author using the IRIS tool developed by the Met Office and then passed on to the Centre for Environmental Data Analysis (CEDA) for archiving.

Data Quality:
Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA)
File Format:
Data are NetCDF formatted.

Citations: 1

The following citations have been automatically harvested from external sources associated with this resource where DOI tracking is possible. As such some citations may be missing from this list whilst others may not be accurate. Please contact the helpdesk to raise any issues to help refine these citation trackings.

Turnock, S.T., Mann, G.W., Woodhouse, M.T., Dalvi, M., O’Connor, F.M., Carslaw, K.S. & Spracklen, D.V. (2019) The Impact of Changes in Cloud Water pH on Aerosol Radiative Forcing. Geophysical Research Letters 46, 4039–4048.

Process overview

This dataset was generated by the computation detailed below.

Met Office unified model (UM) Vn7.3 deployed in a climate model configuration (HadGEM3-UKCA) on the Met Office CRAY HPC facility


Met Office unified model Vn7.3 (UM) deployed in a climate model configuration (HadGEM3-UKCA) on the Met Office CRAY HPC facility

Input Description


Output Description


Software Reference


  • units: cm-3
  • long_name: Annual_N50_aerosol_number_concentration_at_850hPa_for_pH_4pt5
  • var_id: annual_n50_aerosol_number_concentration_at_850hpa_for_ph_4pt5
  • units: cm-3
  • long_name: Annual_N50_aerosol_number_concentration_at_850hPa_for_pH_5
  • var_id: annual_n50_aerosol_number_concentration_at_850hpa_for_ph_5
  • units: cm-3
  • long_name: Annual_N50_aerosol_number_concentration_at_850hPa_for_pH_5pt5
  • var_id: annual_n50_aerosol_number_concentration_at_850hpa_for_ph_5pt5
  • units: cm-3
  • long_name: Annual_N50_aerosol_number_concentration_at_850hPa_for_pH_6
  • var_id: annual_n50_aerosol_number_concentration_at_850hpa_for_ph_6
  • units: cm-3
  • long_name: Annual_N50_aerosol_number_concentration_at_850hPa_for_pH_6pt5
  • var_id: annual_n50_aerosol_number_concentration_at_850hpa_for_ph_6pt5
  • units: Tg S yr-1
  • long_name: Annual_ageing_flux_of_Sulphur_in_aitken_mode_for_1970_2009_pH_4pt5
  • var_id: annual_ageing_flux_of_sulphur_in_aitken_mode_for_1970_2009_ph_4pt5
  • units: m
  • long_name: Annual_dry_aerosol_accumulation_modal_radius_for_pH_5
  • var_id: annual_dry_aerosol_accumulation_modal_radius_for_ph_5
  • units: m
  • long_name: Annual_dry_aerosol_accumulation_modal_radius_for_pH_5pt5
  • var_id: annual_dry_aerosol_accumulation_modal_radius_for_ph_5pt5
  • units: m
  • long_name: Annual_dry_aerosol_accumulation_modal_radius_for_pH_6
  • var_id: annual_dry_aerosol_accumulation_modal_radius_for_ph_6
  • units: 1
  • long_name: Annual_dry_aerosol_aitken_insoluble_modal_radius_for_pH_5
  • var_id: annual_dry_aerosol_aitken_insoluble_modal_radius_for_ph_5
  • units: 1
  • long_name: Annual_dry_aerosol_aitken_insoluble_modal_radius_for_pH_5pt5
  • var_id: annual_dry_aerosol_aitken_insoluble_modal_radius_for_ph_5pt5
  • units: 1
  • long_name: Annual_dry_aerosol_aitken_insoluble_modal_radius_for_pH_6
  • var_id: annual_dry_aerosol_aitken_insoluble_modal_radius_for_ph_6
  • units: m
  • long_name: Annual_dry_aerosol_aitken_modal_radius_for_pH_5
  • var_id: annual_dry_aerosol_aitken_modal_radius_for_ph_5
  • units: m
  • long_name: Annual_dry_aerosol_aitken_modal_radius_for_pH_5pt5
  • var_id: annual_dry_aerosol_aitken_modal_radius_for_ph_5pt5
  • units: m
  • long_name: Annual_dry_aerosol_aitken_modal_radius_for_pH_6
  • var_id: annual_dry_aerosol_aitken_modal_radius_for_ph_6
  • units: m
  • long_name: Annual_dry_aerosol_coarse_modal_radius_for_pH_5
  • var_id: annual_dry_aerosol_coarse_modal_radius_for_ph_5
  • units: m
  • long_name: Annual_dry_aerosol_coarse_modal_radius_for_pH_5pt5
  • var_id: annual_dry_aerosol_coarse_modal_radius_for_ph_5pt5
  • units: m
  • long_name: Annual_dry_aerosol_coarse_modal_radius_for_pH_6
  • var_id: annual_dry_aerosol_coarse_modal_radius_for_ph_6
  • units: m
  • long_name: Annual_dry_aerosol_nucleation_modal_radius_for_pH_5
  • var_id: annual_dry_aerosol_nucleation_modal_radius_for_ph_5
  • units: m
  • long_name: Annual_dry_aerosol_nucleation_modal_radius_for_pH_5pt5
  • var_id: annual_dry_aerosol_nucleation_modal_radius_for_ph_5pt5
  • units: m
  • long_name: Annual_dry_aerosol_nucleation_modal_radius_for_pH_6
  • var_id: annual_dry_aerosol_nucleation_modal_radius_for_ph_6
  • units: ug S m-3
  • long_name: Annual_mean_SO4_concentration_for_pH_4pt5
  • var_id: annual_mean_so4_concentration_for_ph_4pt5
  • units: ug S m-3
  • long_name: Annual_mean_SO4_concentration_for_pH_5
  • var_id: annual_mean_so4_concentration_for_ph_5
  • units: ug S m-3
  • long_name: Annual_mean_SO4_concentration_for_pH_5pt5
  • var_id: annual_mean_so4_concentration_for_ph_5pt5
  • units: ug S m-3
  • long_name: Annual_mean_SO4_concentration_for_pH_6
  • var_id: annual_mean_so4_concentration_for_ph_6
  • units: ug S m-3
  • long_name: Annual_mean_SO4_concentration_for_pH_6pt5
  • var_id: annual_mean_so4_concentration_for_ph_6pt5
  • units: Tg S yr-1
  • long_name: Annual_primary_flux_of_Sulphur_in_aitken_mode_for_1970_2009_pH_5
  • var_id: annual_primary_flux_of_sulphur_in_aitken_mode_for_1970_2009_ph_5
  • units: Tg S yr-1
  • long_name: Annual_primary_flux_of_Sulphur_in_aitken_mode_for_1970_2009_pH_6
  • var_id: annual_primary_flux_of_sulphur_in_aitken_mode_for_1970_2009_ph_6
  • units: Tg S yr-1
  • long_name: Annual_primary_flux_of_Sulphur_in_coarse_mode_for_1970_2009_pH_5
  • var_id: annual_primary_flux_of_sulphur_in_coarse_mode_for_1970_2009_ph_5
  • units: Tg S yr-1
  • long_name: Annual_primary_flux_of_Sulphur_in_coarse_mode_for_1970_2009_pH_6
  • var_id: annual_primary_flux_of_sulphur_in_coarse_mode_for_1970_2009_ph_6
  • units: cm-3
  • long_name: Annual_surface_aerosol_number_concentration_in_aitken_mode_for_pH_5
  • var_id: annual_surface_aerosol_number_concentration_in_aitken_mode_for_ph_5
  • units: cm-3
  • long_name: Annual_surface_aerosol_number_concentration_in_aitken_mode_for_pH_6
  • var_id: annual_surface_aerosol_number_concentration_in_aitken_mode_for_ph_6
  • units: cm-3
  • long_name: Annual_surface_aerosol_number_concentration_in_coarse_mode_for_pH_5
  • var_id: annual_surface_aerosol_number_concentration_in_coarse_mode_for_ph_5
  • units: cm-3
  • long_name: Annual_surface_aerosol_number_concentration_in_coarse_mode_for_pH_6
  • var_id: annual_surface_aerosol_number_concentration_in_coarse_mode_for_ph_6
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_INTO_aitken_mode_for_1970_2009_pH_5
  • var_id: annual_total_flux_of_sulphur_into_aitken_mode_for_1970_2009_ph_5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_INTO_aitken_mode_for_1970_2009_pH_6
  • var_id: annual_total_flux_of_sulphur_into_aitken_mode_for_1970_2009_ph_6
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_INTO_coarse_mode_for_1970_2009_pH_5
  • var_id: annual_total_flux_of_sulphur_into_coarse_mode_for_1970_2009_ph_5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_INTO_coarse_mode_for_1970_2009_pH_6
  • var_id: annual_total_flux_of_sulphur_into_coarse_mode_for_1970_2009_ph_6
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_aitken_mode_for_1970_2009_pH_4pt5
  • var_id: annual_total_flux_of_sulphur_out_aitken_mode_for_1970_2009_ph_4pt5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_aitken_mode_for_1970_2009_pH_5
  • var_id: annual_total_flux_of_sulphur_out_aitken_mode_for_1970_2009_ph_5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_aitken_mode_for_1970_2009_pH_5pt5
  • var_id: annual_total_flux_of_sulphur_out_aitken_mode_for_1970_2009_ph_5pt5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_aitken_mode_for_1970_2009_pH_6
  • var_id: annual_total_flux_of_sulphur_out_aitken_mode_for_1970_2009_ph_6
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_aitken_mode_for_1970_2009_pH_6pt5
  • var_id: annual_total_flux_of_sulphur_out_aitken_mode_for_1970_2009_ph_6pt5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_coarse_mode_for_1970_2009_pH_4pt5
  • var_id: annual_total_flux_of_sulphur_out_coarse_mode_for_1970_2009_ph_4pt5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_coarse_mode_for_1970_2009_pH_5
  • var_id: annual_total_flux_of_sulphur_out_coarse_mode_for_1970_2009_ph_5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_coarse_mode_for_1970_2009_pH_5pt5
  • var_id: annual_total_flux_of_sulphur_out_coarse_mode_for_1970_2009_ph_5pt5
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_coarse_mode_for_1970_2009_pH_6
  • var_id: annual_total_flux_of_sulphur_out_coarse_mode_for_1970_2009_ph_6
  • units: Tg S yr-1
  • long_name: Annual_total_flux_of_Sulphur_OUT_coarse_mode_for_1970_2009_pH_6pt5
  • var_id: annual_total_flux_of_sulphur_out_coarse_mode_for_1970_2009_ph_6pt5
  • units: cm-3
  • long_name: Annual_total_surface_aerosol_number_concentration_for_pH_4pt5
  • var_id: annual_total_surface_aerosol_number_concentration_for_ph_4pt5
  • units: cm-3
  • long_name: Annual_total_surface_aerosol_number_concentration_for_pH_5
  • var_id: annual_total_surface_aerosol_number_concentration_for_ph_5
  • units: cm-3
  • long_name: Annual_total_surface_aerosol_number_concentration_for_pH_5pt5
  • var_id: annual_total_surface_aerosol_number_concentration_for_ph_5pt5
  • units: cm-3
  • long_name: Annual_total_surface_aerosol_number_concentration_for_pH_6
  • var_id: annual_total_surface_aerosol_number_concentration_for_ph_6
  • units: cm-3
  • long_name: Annual_total_surface_aerosol_number_concentration_for_pH_6pt5
  • var_id: annual_total_surface_aerosol_number_concentration_for_ph_6pt5
  • units: kg S
  • long_name: Monthly_surface_SO4_concentration_at_pH_5
  • var_id: monthly_surface_so4_concentration_at_ph_5
  • units: kg S
  • long_name: Monthly_surface_SO4_concentration_at_pH_6pt5
  • var_id: monthly_surface_so4_concentration_at_ph_6pt5
  • units: hours
  • standard_name: forecast_period
  • var_id: forecast_period
  • var_id: forecast_period_bnds
  • standard_name: forecast_reference_time
  • var_id: forecast_reference_time
  • var_id: latitude_0_bnds
  • var_id: latitude_bnds
  • var_id: latitude_longitude
  • units: m
  • long_name: level_height
  • var_id: level_height
  • var_id: level_height_bnds
  • var_id: longitude_bnds
  • units: 1
  • standard_name: model_level_number
  • var_id: model_level_number
  • units: 1
  • var_id: sigma
  • long_name: sigma
  • var_id: sigma_bnds
  • var_id: time_bnds

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: latitude_0
  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude
  • standard_name: time
  • var_id: time
Temporal Range
Start time:
End time:
Geographic Extent