Version: 0.0.1 | Published: 9 Nov 2021 | Updated: 1297 days ago
CMIP5 20-Year Climatology Data for the IPCC DDC
Dataset
Summary
Citation:
CITATION INCOMPLETE
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Documentation
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Description:
CMIP5 monthly mean climatology fields matching those given in IPCC WG1 AR5 Annex I: Atlas of Global and Regional Climate Projections in Climate Change 2013, the Fifth Assessment Report (AR5) of the United Nations Intergovernmental Panel on Climate Change (IPCC).
Climatologies have been calculated for global fields of Specific Humidity, Precipitation, Sea Level Pressure, Temperature, Wind and Downwelling Shortwave Radiation (Stoker et. al., 2013). The CMIP5 climatologies, calculated by the Centre for Environmental Data Analysis (CEDA), match those described in table AI.1 in Stoker et al (2013). Twenty-year climatologies and climatological anomalies are calculated for the CMIP5 experiments: piControl, 1pctCO2, historical, rcp26, rcp45, rcp60 and rcp85. The monthly climatology data covers the period from 1850-2100. The climatologies are of global scope and are provided on latitude-longitude grids.
Is Part Of:
Model data described in the 2013 IPCC AR5 20 and 30 year climatologies
Coverage
Spatial Coverage:
Global
Start Date:
01 January 2016
End Date:
31 December 2100
Geographic Bounding Box
Lower Left Latitude:
-90
Lower Left Longitude:
-180
Upper Right Latitude:
90
Upper Right Longitude:
180
Provenance
Source:
Climatologies and climatological anomalies have been calculated at CEDA from
CMIP5 model output. Time periods: - periods are defined as being: - Relative to
2000 for future scenarios (RCPy.x) - Relative to 1900 for historical run -
Relative to the beginning of the experiment for the piControl and 1pctCO2 runs -
Twenty year averaging periods: +20 to +39, +46 to +65, +80 to +99, +180 to +199
Anomaly specification: All values are taken as anomalies from the 1986->2005
mean (base line values). For the Historical and RCP simulations these base line
values are taken from the Historical experiment. For the 1pctCO2 and piControl
simulations the base line values are taken from the last 20 years of the
piControl experiment. Output: - Period mean of the monthly mean of the variables
- 12 monthly values per climatology - Climatology is a 2D field - One
climatology per model per scenario per variable per time period - CF compliant
netCDF files Directory Structure: The output directory structure follows the DRS
specification with the root directory being /derived. Each file has the extended
attribute: clim-anom-ref5. This indicates that it is a climatological mean
anomaly (clim-anom) and that the reference period matches the AR5 reference
period (ref5). Method: The algorithm follows the process below: - For every
model: - For every variable (if available): calculate the 1986->2005
climatological (period average) monthly means (baseline) for the Historical
experiment - For every model: - For every variable (if available): calculate the
period average monthly means (baseline) of the last 20 years of the piControl
run - For every model: - For every experiment: - For every time period: - For
every variable (if available): calculate the climatological monthly mean for
this (model, experiment, time period, variable) and subtract the relevant
baseline Code:
https://github.com/cedadev/ipcc_ddc_cmip5_clim_anoms/releases/tag/1.0
Accessibility
Access
Access Service:
This data is publically avaliable for download. When using these data you must
cite them correctly using the citation given on the Data Catalogue record.
Format:
NetCDF
Language:
en
Usage
Is Referenced By:
Resource Creator:
- Stocker, T.F.
- Qin, D.
Enrichment and Linkage
Origin
Name:
IPCC Data Catalogue