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Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 2.36 (v20211112)

Update Frequency: Not Planned
Latest Data Update: 2021-11-12
Status: Ongoing
Publication State: Preview
Publication Date:


Data for Figure 2.36 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 2.36 shows changes in ENSO variability over time. The upper panel shows multi-centennial changes while the lower panel shows changes during the instrumental period.

How to cite this dataset
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:
Gulev, S.K., P.W. Thorne, J. Ahn, F.J. Dentener, C.M. Domingues, S. Gerland, D. Gong, D.S. Kaufman, H.C. Nnamchi, J. Quaas, J.A. Rivera, S. Sathyendranath, S.L. Smith, B. Trewin, K. von Schuckmann, and R.S. Vose, 2021: Changing State of 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. 287–422, doi:10.1017/9781009157896.004.

Sources of additional information
The following weblinks are provided in the Related Documents section of this catalogue record:
- Link to the report component containing the figure (Chapter 2)
- Link to the Supplementary Material for Chapter 2, which contains details on the input data used in Table 2.SM.1

Figure subpanels
There are two subpanels. Data are provided for lower panel. Links to the data used for the upper panel are provided as part of the Supplementary Material for Chapter 2

List of data provided
This dataset contains 30-year standard deviations in instrumental Nino 3.4, the proxy mean, and the Southern Oscillation Index (SOI), beginning from the first SOI data (1876-1905).

Data provided in relation to figure
Panel b:

- Data file: Figure_2_36-instrumental_period_data.csv, second column blue line
- Data file: Figure_2_36-instrumental_period_data.csv, third column cyan line
- Data file: Figure_2_36-instrumental_period_data.csv, fourth column orange line

Citable as:  [ PROVISIONAL ] McGregor, S.; Trewin, B. (9999): Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 2.36 (v20211112). NERC EDS Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: IPCC-DDC, IPCC, Intergovernmental Panel on Climate Change, AR6, WG1, WGI, Sixth Assessment Report, Working Group I, Physical Science Basis, Chapter 2, Changing state, Multi-millennial context, pre-industrial, Natural forcing, anthropogenic forcing, Radiative forcing, Large-scale indicators, observed changes, Modes of variability, Figure 2.36, ENSO, ENSO variance


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
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: 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 curated on behalf of the IPCC Data Distribution Centre (IPCC-DDC).

Data Quality:
Data as provided by the IPCC
File Format:
Not defined

Process overview

This dataset was generated by the computation detailed below.

Caption for Figure 2.36 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6)


Reconstructed and historical variance ratio of El Niño–Southern Oscillation (ENSO). (a) 30-year running variance of the reconstructed annual mean Niño 3.4 or related indicators from various published reconstructions. (b) Variance of June–November Southern Oscillation Index (SOI) and April–March mean Niño 3.4 (1981–2010 base period) along with the mean reconstruction from (a). Further details on data sources and processing are available in the chapter data table (Table 2.SM.1).

Input Description


Output Description


Software Reference


No variables found.

Temporal Range
Start time:
End time:
Geographic Extent

Related parties
Principal Investigators (1)