Chapter 3 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 3.18 (v20211001)

Data for Figure 3.18 from Chapter 3 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 3.18 shows instantaneous Northern-Hemisphere blocking frequency (% of days) in the extended northern winter season (DJFM) for the years 1979-2000.

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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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List of data provided

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This dataset contains blocking freuency (1979-2000) of

- ERA5 reanalysis

- CMIP5 and CMIP6 multi-model mean

ERA5 is the fifth generation ECMWF (European Centre for Medium-Range Weather Forecasts) atmospheric reanalysis of the global climate.

CMIP6 is the sixth phase of the Coupled Model Intercomparison Project.

CMIP5 is the fifth phase of the Coupled Model Intercomparison Project.

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Data provided in relation to figure

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AR6_WG1_Chap3_Figure3_18_blocking.csv (lines and shading)

Corresponding line and shading colours are described in the metadata associated with the datafile

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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.

Date (Publication): 2021-10-31T12:18:00

Date (Creation): 2021-10-31T12:18:00

Citation identifier: https://catalogue.ceda.ac.uk/uuid/84fd20b6e5a04271a007e2150eb17c7e

Citation identifier: NERC EDS Centre for Environmental Data Analysis / 84fd20b6e5a04271a007e2150eb17c7e

Citation identifier: doi / 10.5285/84fd20b6e5a04271a007e2150eb17c7e

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Unavailable	Kazeroni, Rémi	Unavailable	Author
Unavailable	Bock, Lisa	Unavailable	Author
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Custodian
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	pointofContact
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Publisher

Maintenance and update frequency: Not planned

Update scope: Dataset

Keywords

IPCC-DDC
IPCC
AR6
WG1
WGI
Sixth Assessment Report
Working Group I
Physical Science Basis
Chapter 3
Human influence
large-scale indicators
Natural variability
anthropogenically-forced change
observed changes
Figure 3.18
blocking frequency

GEMET - INSPIRE themes, version 1.0

atmospheric conditions

Access constraints: Other restrictions

Other constraints: Public data: access to these data is available to both registered and non-registered users.

Use constraints: Other restrictions

Other constraints: Under the following licence http://creativecommons.org/licenses/by/4.0/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: Grid

Language: English

Topic category

Climatology, meteorology, atmosphere

Begin date: 1979-01-01T12:00:00

End date: 2000-12-31T12:00:00

Unique resource identifier: WGS 84

Distribution format

Name	Version
Data are netCDF formatted.

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/84fd20b6e5a04271a007e2150eb17c7e	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/ar6_wg1/data/ch_03/ch3_fig18/v20211001/	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter_03_Supplementary_Material.pdf	SUPPLEMENTARY MATERIAL FOR REPORT CHAPTER: 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 Supplementary Material. 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

OnLine resource

Protocol	Linkage	Name
	https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter_03.pdf	ORIGIN OF FIGURE (IPCC REPORT CHAPTER): 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

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5281/zenodo.6778109	CODE FOR FIGURE (archived at Zenodo)

OnLine resource

Protocol	Linkage	Name
	https://www.ipcc.ch/report/ar6/wg1/figures/chapter-3/figure-3-18/	LINK TO FIGURE

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5281/zenodo.14986349	Complex Citation Object: CMIP6 input data usage information for IPCC WGI AR6 figure 3.18, Zenodo. https://doi.org/10.5281/zenodo.14986349

Hierarchy level: Dataset

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Statement: 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).

Metadata

File identifier: 84fd20b6e5a04271a007e2150eb17c7e XML

Metadata language: English

Character set: UTF8

Parent identifier: IPCC Sixth Assessment Report (AR6) Chapter 3: Human influence on the climate system
932c79b1f7cd4f34b7c542f316f39c17

Hierarchy level: Dataset

Date stamp: 2026-01-15T03:20:46

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS Centre for Environmental Data Analysis		support@ceda.ac.uk	Point of contact

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