Data for Figure SPM.1 from the Summary for Policymakers (SPM) of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure SPM.1 shows global temperature history and causes of recent warming.

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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:

IPCC, 2021: Summary for Policymakers. 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. In Press.

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Figure subpanels

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The figure has two panels, with data provided for all panels in subdirectories named panel_a and panel_b.

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List of data provided

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Panel a

The dataset contains:

- Estimated temperature during the warmest multi-century period in at least the last 100,000 years, which occurred around 6500 years ago (4500 BCE), multi-centennial average, from AR6 WGI Chapter 2

- Global surface temperature change time series relative to 1850-1900 for 1-2020 from:

• 1-2000 CE reconstruction from paleoclimate archives, decadal smoothed, from PAGES2k Consortium (2019, DOI: 10.1038/s41561-019-0400-0)

• 1850-2020 CE, observations, decadal smoothed, from AR6 WGI Chapter 2 assessed mean

Panel b:

The dataset contains global surface temperature change time series relative to 1850-1900 for 1850-2020 from simulations from the sixth phase of the Coupled Model Intercomparison Project (CMIP6) and observations:

- CMIP6 historical+ssp245 simulations (simulations with human and natural forcing, 1850-2019)

- CMIP6 hist-nat simulations (simulations with natural forcing, 1850-2019)

- Global Surface Temperature Anomalies (GSTA) relative to 1850-1900 from observations assessed in IPCC AR6 WG1 Chapter 2 (1850-2020)

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Data provided in relation to figure

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Panel a:

- panel_a/SPM1_1-2000_recon.txt, 1-2000 time series, decadal smoothed, for years centered on 5-1996 CE [column 1 grey line, columns 2 and 3 grey shading]

- panel_a/SPM1_1850-2020_obs.txt, 1850-2020 time series, decadal smoothed, for years centered on 1855-2016 CE [black line]

- panel_a/SPM1_6500_recon.txt, bar for the warmest multi-century period in more than 100,000 years (around 6500 years ago: 4500 BCE) [grey bar]

Panel b:

- panel_b/gmst_changes_model_and_obs.csv. Global surface temperature change time series relative to 1850-1900 for 1850-2020 from:

• CMIP6 historical+ssp245 simulations (1850-2019) [mean, brown line]

• CMIP6 historical+ssp245 simulations (1850-2019) [5% range, brown shading, bottom]

• CMIP6 historical+ssp245 simulations (1850-2019) [95% range, brown shading, top]

• CMIP6 hist-nat simulations (1850-2019) [mean, green line]

• CMIP6 hist-nat simulations (1850-2019) [5% range, green shading, bottom]

• CMIP6 hist-nat simulations (1850-2019) [95% range, green shading, top]

• Global Surface Temperature Anomalies (GSTA) relative to 1850-1900 from observations assessed in IPCC AR6 WG1 Chapter 2 (1850-2020) [black line]

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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 webpage, which includes the report component containing the figure (Summary for Policymakers), the Technical Summary (Cross-Section Box TS.1, Figure 1a) and the Supplementary Material for Chapters 2 and 3, which contains details on the input data used in Tables 2.SM.1 (Figure 2.11a) and 3.SM.1 (Figure 3.2c; FAQ 3.1, Figure 1).

- Link to related publication for input data