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Dataset

 

Chapter 9 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 9.4 (v20220721)

Status: Ongoing
Online Status: ONLINE
Publication State: Citable
Publication Date: 2023-02-01
DOI Publication Date: 2023-05-15
Download Stats: last 12 months
Dataset Size: 14 Files | 7MB

Abstract

Data for Figure 9.4 from Chapter 9 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 9.4 shows global maps of observed mean fluxes, the observed trends in these fluxes, and the projected rate of change in these fluxes from SSP5-8.5, for freshwater, net heat, and wind stress magnitude (momentum).

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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 9 panels labelled (a)-(i), with data provided for all panels using this lettering system in the GitHub repository linked in the documentation.

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List of data provided
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This dataset contains:

- Freshwater flux (a–c), net heat flux (d–f), and momentum flux or wind stress magnitude (g–i).
- Means and observed trends between 1995–2014 (freshwater and wind stress) or 2001–2014 (heat).
- SSP5-8.5 projected rates between 1995–2100 using 20-year averages at each end of the time period. - - Objective interpolation from CERES, EBAF v4 (Kato et al., 2018), OAFlux-HR (Yu, 2019) and GPCP (Adler et al., 2003) of fluxes and flux trends (b, e, h).

Observed trends with no overlay indicate regions where the trends are significant at p = 0.34 level. Crosses indicate regions where trends are not significant. For (c, f, i) projections, no overlay indicates regions with high model agreement, where ≥80% of models agree on the sign of change. Diagonal lines indicate regions with low model agreement, where <80% of models agree on the sign of change (see Cross-Chapter Box Atlas.1 for more information).

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 9.4

- Data file: Fig9-4a_data.nc:
- Data file: Fig9-4b_data.nc:
- Data file: Fig9-4c_data.nc:
- Data file: Fig9-4d_data.nc:
- Data file: Fig9-4e_data.nc:
- Data file: Fig9-4f_data.nc:
- Data file: Fig9-4g_data.nc:
- Data file: Fig9-4g_data_tauu.nc:
- Data file: Fig9-4g_data_tauv.nc:
- Data file: Fig9-4h_data.nc:
- Data file: Fig9-4i_data.nc:

CERES stands for Clouds and the Earth’s Radiant Energy System.
EBAF stands for Energy Balanced And Filled.
OAFlux-HR stands for Objectively Analyzed air–sea Fluxes-High Resolution.
GPCP is the Global Precipitation Climatology Project.
SSP stands for Shared Socio-Economic Pathway.
SSP585 is the Shared Socioeconomic Pathway which represents the upper boundary of radiative forcing and development scenarios, consistent with RCP8.5.

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Notes on reproducing the figure from the provided data
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Flux maps were plotted using standard matplotlib software, code is available via the link in the documentation.

Some of the plotting code is designed to use pre-processed CMIP data, rather than the provided netcdf files. To reproduce these figures form the metadata please modify the example code linked in the Related Documents section of this catalogue record.

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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 example code on GitHub
- Link to the output data for this figure, contained in a dedicated GitHub repository.

Citable as:  Pearson, B. (2023): Chapter 9 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 9.4 (v20220721). NERC EDS Centre for Environmental Data Analysis, 15 May 2023. doi:10.5285/fdfeb81d2ffd42c3ba2bbb00b681317c. https://dx.doi.org/10.5285/fdfeb81d2ffd42c3ba2bbb00b681317c
Abbreviation: Not defined
Keywords: IPCC-DDC, IPCC, AR6, WG1, WGI, Sixth Assessment Report, Working Group 1, Physical Science Basis, surface flux, freshwater flux, surface heat flux, heat flux, wind stress

Details

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: 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 curated on behalf of the IPCC Data Distribution Centre (IPCC-DDC).

Data Quality:
Data as provided by the IPCC
File Format:
NetCDF, txt

Process overview

This dataset was generated by the computation detailed below.
Title

Caption for Figure 9.4 from Chapter 9 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6)

Abstract

Global maps of observed mean fluxes (a, d, g), the observed trends in these fluxes (b, e, h) and the projected rate of change in these fluxes from SSP5-8.5 (c, f, i). Shown are the freshwater flux (a–c), net heat flux (d–f), and momentum flux or wind stress magnitude (g–i), with positive numbers indicating ocean freshening, warming, and accelerating respectively. The means and observed trends are calculated between 1995–2014 (freshwater and wind stress) or 2001–2014 (heat). The SSP5-8.5 projected rates are between 1995–2100 using 20-year averages at each end of the time period. Observations show objective interpolation from Clouds and the Earth’s Radiant Energy System (CERES) Energy Balanced and Filled (EBAF) v4 (Kato et al., 2018), Objectively Analyzed air–sea Fluxes-High Resolution (OAFlux-HR) (Yu, 2019), and Global Precipitation Climatology Project (GPCP) (Adler et al., 2003) of fluxes and flux trends (b, e, h). Observed trends with no overlay indicate regions where the trends are significant at p = 0.34 level. Crosses indicate regions where trends are not significant. For (c, f, i) projections, no overlay indicates regions with high model agreement, where ≥80% of models agree on the sign of change. Diagonal lines indicate regions with low model agreement, where <80% of models agree on the sign of change (see Cross-Chapter Box Atlas.1 for more information). 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

  • var_id: Latitude
  • var_id: Longitude
  • var_id: Mask
  • var_id: hfds
  • var_id: hfds_trend
  • var_id: tau
  • var_id: tau_trend
  • var_id: tauu
  • var_id: tauv
  • var_id: wfo
  • var_id: wfo_trend

Co-ordinate Variables

Coverage
Temporal Range
Start time:
1995-01-01T00:00:00
End time:
2100-12-31T23:59:59
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°