5808b237bdb5485d9bc3595f39ce85e3 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 dataset Centre for Environmental Data Analysis (CEDA) 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointOfContact 2026-05-10T02:19:36 UK GEMINI 2.3 WGS 84 SMURPHS: Historical HadGEM3-GC3.1 scaled aerosol coupled ensemble 2020-10-23T08:54:43 publication 2020-10-23T08:54:43 creation https://catalogue.ceda.ac.uk/uuid/5808b237bdb5485d9bc3595f39ce85e3 5808b237bdb5485d9bc3595f39ce85e3 Centre for Environmental Data Analysis (CEDA) This dataset consists of 5x5 historical simulations (1850-2014) with HadGEM3-GC3.1 (Met Office Hadley Centre Global Coupled model General Circulation 3.1). This is an ensemble dataset, part of the Securing Multidisciplinary UndeRstanding and Prediction of Hiatus and Surge events (SMURPHS) project. The model version used here is a development version of the UK's submission to Coupled Model Intercomparison Project Phase 6 (CMIP6) and differs from the CMIP6 version in its treatment of prescribed ozone. This ensemble was designed to sample a range in plausible historical aerosol forcing, with the present-day aerosol effective radiative forcing ranging from -0.38 W/m2 to -1.5 W/m2, which spans a large range of the total aerosol effective radiative forcing presented in Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5). The targeted aerosol forcings were achieved by applying a constant scaling factor in space and time to the standard historical CMIP6 historical AA and precursor emissions, namely organic and black carbon (fossil and biofuel) and sulfur dioxide (SO2) emissions. All other forcing agents follow historical CMIP6 emissions. The scalings were chosen such that the targeted aerosol forcings are approximately equally spaced: - 0.2x scaling to give -0.38 W/m2 - 0.4x scaling to give -0.60 W/m2 - 0.7x scaling to give -0.93 W/m2 - 1.0x scaling to give -1.17 W/m2 - 1.5x scaling to give -1.50 W/m2. The scalings required to reach the intended forcing values were determined from 5 10-year atmosphere-only time-slice runs for the year 2014 with pre-industrial sea-surface temperatures. Note that the 1x scaling is not strictly a ‘scaling’ but corresponds to the standard emissions. The configuration for the scaled aerosol simulations was derived from the 1x scaling simulations, therefore these are directly comparable with the only difference being the scaled aerosol emissions. Five simulations were performed for each scaling and the simulations cover the period 1850-2014. The same five initial conditions were used for each scaling sub-ensemble, and the first four correspond to the initial conditions selected for the four CMIP6 historical simulations. These were well spaced in a pre-industrial control simulation and sample different phases of internal variability in both the Pacific and Atlantic. We recommend only analysing data from 1900, as introducing the scaled aerosols in 1850 produces a small initial drift in the climate system. We estimate that most of this drift has been removed by 1900. The reference paper for this dataset is Dittus et al., 2020. Please cite this paper when using the dataset. Dittus, A. J., Hawkins, E., Wilcox, L. J., Sutton, R. T., Smith, C. J., Andrews, M. B. and P. M. Forster, 2020: Sensitivity of historical climate simulations to uncertain aerosol forcing. In press, Geophysical Research Letters Dittus, Andrea Unavailable author Unavailable author Andrews, Martin Unavailable author Unavailable author Hawkins, Ed Unavailable author Unavailable author Smith, Christopher Unavailable author Unavailable author Wilcox, Laura Unavailable author Unavailable author Centre for Environmental Data Analysis (CEDA) custodian 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk custodian Centre for Environmental Data Analysis (CEDA) data_owner 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk owner Centre for Environmental Data Analysis (CEDA) distributor 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor Hawkins, Ed Unavailable principal_investigator Unavailable principalInvestigator NERC EDS Centre for Environmental Data Analysis point_of_contact 01235446432 RAL Space STFC Rutherford Appleton Laboratory, Harwell Campus Didcot OX11 0QX United Kingdom support@ceda.ac.uk pointofContact Dittus, Andrea Unavailable point_of_contact Unavailable pointofContact Centre for Environmental Data Analysis (CEDA) publisher 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk publisher unknown dataset SMURPHS coupled HadGEM3-GC3.1 aerosol ensemble historical atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Public data: access to these data is available to both registered and non-registered users. otherRestrictions Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. grid English climatologyMeteorologyAtmosphere -180.0 180.0 -90.0 90.0 1850-01-01T00:00:00 2014-12-30T23:59:59 Data are provided in NetCDF formats. Centre for Environmental Data Analysis (CEDA) Data Center Contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/5808b237bdb5485d9bc3595f39ce85e3 CEDA Data Catalogue Page Detail and access information for the resource information http://data.ceda.ac.uk/badc/smurphs/data/coupled_ensemble/ DOWNLOAD Download Data download https://smurphs.leeds.ac.uk/ SMURPHS project No further details. information https://docs.google.com/document/d/1XdqBYO-HWsp0gWYAXHGnnzC-vUwGSKc2o4cfBLZ5N3g/edit#heading=h.uiw52e3cgbki SMURPHS “scaled aerosols” ensemble: description and data access No further details. information dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 The historical-0p2, historical-0p4, historical-0p7 and historical-1p5 ensemble members (20 in total), as well as the fifth member of historical-1p0, were run by Andrea Dittus. The historical-1p0 ensemble members were run by Martin Andrews. The data were post-processed by Andrea Dittus. The data were passed from the project team to the Centre for Environmental Data Analysis for archival and distribution.