Dataset
Chapter 9 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 9.15 (v20220712)
Abstract
Data for Figure 9.15 from Chapter 9 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).
Figure 9.15 shows Antarctic sea ice historical records and CMIP6 projections.
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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:
Fox-Kemper, B., H.T. Hewitt, C. Xiao, G. Aðalgeirsdóttir, S.S. Drijfhout, T.L. Edwards, N.R. Golledge, M. Hemer, R.E. Kopp, G. Krinner, A. Mix, D. Notz, S. Nowicki, I.S. Nurhati, L. Ruiz, J.-B. Sallée, A.B.A. Slangen, and Y. Yu, 2021: Ocean, Cryosphere and Sea Level Change. 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. 1211–1362, doi:10.1017/9781009157896.011.
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Figure subpanels
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The figure has 2 subpanels, with data provided for both panels.
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List of data provided
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This dataset contains:
- (Left panel) Absolute anomaly of observed monthly mean Antarctic sea ice area during the period 1979–2019 relative to the average monthly mean Antarctic sea ice area during the period 1979–2008.
- (Right panel) Sea ice coverage in the Antarctic as given by the average of the three most widely used satellite-based estimates for September and February, which usually are the months of maximum and minimum sea ice coverage, respectively.
First column: Mean sea ice coverage during the decade 1979–1988.
Second column: Mean sea ice coverage during the decade 2010–2019.
Third column: Absolute change in sea ice concentration between these two decades, with grid lines indicating non-significant differences.
Fourth column: Number of available CMIP6 models that simulate a mean sea ice concentration above 15% for the decade 2045–2054.
The average observational record of sea ice area is derived from the UHH sea ice area product (Doerr et al., 2021), based on the average sea ice concentration of OSISAF/CCI (OSI-450 for 1979–2015, OSI-430b for 2016–2019) (Lavergne et al., 2019), NASA Team (version 1, 1979–2019) (Cavalieri et al., 1996) and Bootstrap (version 3, 1979–2019) (Comiso, 2017) that is also used for the figure panels showing observed sea ice concentration.
Further details on data sources and processing are available in the chapter data table (Table 9.SM.9).
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Data provided in relation to figure
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Data provided in relation to Figure 9.15
- Data file: NSIDC_polehole_big.nc
- Data file: NSIDC_polehole_small.nc
- Data file: SeaIceArea__NorthernHemisphere__monthly__UHH__v2019_fv0.01.nc
- Data file: SeaIceArea__SouthernHemisphere__monthly__UHH__v2019_fv0.01.nc
- Data file: cryo_div.txt
- Data file: cryo_seq.txt
Datafile 'mapplot_data.npz' included in the 'Plotted Data' folder of the GitHub repository is not archived here but on Zenodo at the link provided in the Related Documents section of this catalogue record.
CMIP6 is the sixth phase of the Coupled Model Intercomparison Project.
NSIDC is the National Snow and Ice Data Center.
UHH is the University of Hamburg (Universität Hamburg).
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Notes on reproducing the figure from the provided data
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Both panels were plotted using standard matplotlib software - code is available via the link in the documentation.
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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 figure on the IPCC AR6 website
- Link to the report component containing the figure (Chapter 9)
- Link to the Supplementary Material for Chapter 9, which contains details on the input data used in Table 9.SM.9
- Link to the data and code used to produce this figure and others in Chapter 9, archived on Zenodo.
- Link to the code and output data for this figure, contained in a dedicated GitHub repository.
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(s): 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: |
NetCDF, txt
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Related Documents
Process overview
Title | Caption for Figure 9.15 from Chapter 9 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6) |
Abstract | Antarctic sea ice historical records and Coupled Model Intercomparison Project Phase 6 (CMIP6) projections. (left) Absolute anomaly of observed monthly mean Antarctic sea ice area during the period 1979–2019 relative to the average monthly mean Antarctic sea ice area during the period 1979–2008. (right) Sea ice coverage in the Antarctic as given by the average of the three most widely used satellite-based estimates for September and February, which usually are the months of maximum and minimum sea ice coverage, respectively. First column: Mean sea ice coverage during the decade 1979–1988. Second column: Mean sea ice coverage during the decade 2010–2019. Third column: Absolute change in sea ice concentration between these two decades, with grid lines indicating non-significant differences. Fourth column: Number of available CMIP6 models that simulate a mean sea ice concentration above 15% for the decade 2045–2054. The average observational record of sea ice area is derived from the UHH sea ice area product (Doerr et al., 2021), based on the average sea ice concentration of OSISAF/CCI (OSI-450 for 1979–2015, OSI-430b for 2016–2019) (Lavergne et al., 2019), NASA Team (version 1, 1979–2019) (Cavalieri et al., 1996) and Bootstrap (version 3, 1979–2019) (Comiso, 2017) that is also used for the figure panels showing observed sea ice concentration. Further details on data sources and processing are available in the chapter data table (Table 9.SM.9). |
Input Description | None |
Output Description | None |
Software Reference | None |
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: HadISST_nsidc
- long_name: HadISST_nsidc monthly Antarctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: HadISST_nsidc
- long_name: HadISST_nsidc monthly Arctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: HadISST_orig
- long_name: HadISST_orig monthly Antarctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: HadISST_orig
- long_name: HadISST_orig monthly Arctic sea-ice area
- units: 1
- standard_name: sea_ice_area_fraction
- var_id: goddard_nt_seaice_conc_monthly
- long_name: Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration by NASA Team algorithm with Goddard QC
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: nsidc_bt
- long_name: nsidc_bt monthly Antarctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: nsidc_bt
- long_name: nsidc_bt monthly Arctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: nsidc_nt
- long_name: nsidc_nt monthly Antarctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: nsidc_nt
- long_name: nsidc_nt monthly Arctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: osisaf
- long_name: osisaf monthly Antarctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: osisaf
- long_name: osisaf monthly Arctic sea-ice area
- standard_name: sea_ice_area
- units: 1e6 km2
- var_id: walsh
- long_name: walsh monthly Arctic sea-ice area
Co-ordinate Variables
- standard_name: time
- var_id: time
- units: days
- long_name: ANSI date
- units: degrees_north
- standard_name: latitude
- long_name: latitude
- var_id: lat
- units: degrees_east
- standard_name: longitude
- long_name: longitude
- var_id: lon
- long_name: time
- standard_name: time
- var_id: time
- units: days
Temporal Range
1979-01-01T00:00:00
2054-12-31T23:59:59
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
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-90.0000° |