Dataset
Chapter 3 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 3.22 (v20220613)
Abstract
Data for Figure 3.22 from Chapter 3 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).
Figure 3.22 shows time series of Northern Hemisphere March-April mean snow cover extent (SCE) from observations, CMIP5 and CMIP6 simulations.
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How to cite this dataset
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When citing this dataset, please include both the data citation below (under 'Citable as') and the following citation for the report component from which the figure originates:
Eyring, V., N.P. Gillett, K.M. Achuta Rao, R. Barimalala, M. Barreiro Parrillo, N. Bellouin, C. Cassou, P.J. Durack, Y. Kosaka, S. McGregor, S. Min, O. Morgenstern, and Y. Sun, 2021: Human Influence on the Climate System. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 423–552, doi:10.1017/9781009157896.005.
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Figure subpanels
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There are technically two panels top and bottom (CMIP5 and CMIP6), however, the data is stored in the parent directory.
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List of data provided
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The data is for the Northern Hemisphere snow cover extent anomalies (SCEA) from models and observations:
- The SCEA observational data from GLDAS-NOAH (1948-2012), Brown-NOAA (1923-2017), Mudryk et al 2020 (1968-2017)
- The SCEA modelled by CMIP5 historical-rcp45 experiment (1923-2017)
- The SCEA modelled by CMIP5 historicalNat experiment (1923-2012)
- The SCEA modelled by CMIP6 historical-ssp245 experiment (1923-2017)
- The SCEA modelled by CMIP6 hist-nat experiment (1923-2017)
- The SCEA modelled by CMIP5 and CMIP6 piControl experiments
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Data provided in relation to figure
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snow_cover_extent_cmip5_obs.csv is the data for the green and brown lines and shadings in the upper panel and grey lines (1923-2017)
snow_cover_extent_cmip6_obs.csv is the data for the green and brown lines and shadings in the lower panel and grey lines (1923-2017)
snow_cover_extent_piControl.csv for the blue error bars in the both panels
Additional details of data provided in relation to figure in the file header (BADC-CSV file)
CMIP5 is the fifth phase of the Coupled Model Intercomparison Project.
CMIP6 is the sixth phase of the Coupled Model Intercomparison Project.
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Sources of additional information
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The following weblinks are provided in the Related Documents section of this catalogue record:
- Link to the report component containing the figure (Chapter 3)
- Link to the Supplementary Material for Chapter 3, which contains details on the input data used in Table 3.SM.1
- Link to the code for the figure, archived on Zenodo.
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://creativecommons.org/licenses/by/4.0/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data produced by Intergovernmental Panel on Climate Change (IPCC) authors and supplied for archiving at the Centre for Environmental Data Analysis (CEDA) by the Technical Support Unit (TSU) for IPCC Working Group I (WGI). |
| Data Quality: |
Data as provided by the IPCC
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| File Format: |
Data are netCDF formatted
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Related Documents
Process overview
| Title | Caption for Figure 3.22 from Chapter 3 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6) |
| Abstract | Time series of Northern Hemisphere March–April mean snow cover extent (SCE) from observations, CMIP5 and CMIP6 simulations. The observations (grey lines) are updated Brown-NOAA (Brown and Robinson, 2011), Mudryk et al. (2020), and GLDAS2. CMIP5 (top) and CMIP6 (bottom) simulations of the response to natural plus anthropogenic forcing are shown in orange, natural forcing only in green, and the pre-industrial control simulation range is presented in blue. Five-year mean anomalies are shown for the 1923–2017 period with the x-axis representing the centre years of each five-year mean. CMIP5 all forcing simulations are extended by using RCP4.5 scenario simulations after 2005 while CMIP6 all forcing simulations are extended by using SSP2-4.5 scenario simulations after 2014. Shading indicates 5th–95th percentile ranges for CMIP5 and CMIP6 all and natural forcings simulations, and solid lines are ensemble means, based on all available ensemble members with equal weight given to each model (Section 3.2). The blue vertical bar indicates the mean 5th–95th percentile range of pre-industrial control simulation anomalies, based on non-overlapping segments. The numbers in brackets indicate the number of models used. Anomalies are relative to the average over 1971–2000. For models, SCE is restricted to gridcells with land fraction ≥50%. Greenland is excluded from the total area summation. Figure is modified from Paik et al. (2020a), their Figure 1. Further details on data sources and processing are available in the chapter data table (Table 3.SM.1). |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- long_name: Year
- units: Year
- var_id: 1
- var_id: 1
- long_name: cmip_era
- units: cmip_era
- var_id: 2
- units: 10E6 km2
- long_name: scea_blue_error_bar_bottom
- var_id: 3
- units: 10E6 km2
- long_name: scea_blue_error_bar_top
- var_id: 8
- units: 10E6 km2
- long_name: scea_brown_line_hist_rcp45
- var_id: 8
- units: 10E6 km2
- long_name: scea_brown_line_hist_ssp245
- var_id: 9
- units: 10E6 km2
- long_name: scea_brown_shading_bottom_hist_rcp45
- var_id: 9
- units: 10E6 km2
- long_name: scea_brown_shading_bottom_hist_ssp245
- var_id: 10
- units: 10E6 km2
- long_name: scea_brown_shading_top_hist_rcp45
- var_id: 10
- units: 10E6 km2
- long_name: scea_brown_shading_top_hist_ssp245
- var_id: 5
- units: 10E6 km2
- long_name: scea_green_line_hist_nat
- var_id: 6
- units: 10E6 km2
- long_name: scea_green_shading_bottom_hist_nat
- var_id: 7
- units: 10E6 km2
- long_name: scea_green_shading_top_hist_nat
- var_id: 4
- units: 10E6 km2
- long_name: scea_grey_line_dashed_mudryk
- var_id: 3
- units: 10E6 km2
- long_name: scea_grey_line_dotted_gldas2
- var_id: 2
- long_name: scea_grey_line_solid_brown
- units: 10E6 km2
Co-ordinate Variables
Temporal Range
1923-03-01T12:00:00
2017-04-30T12:00:00
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
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-90.0000° |