This website uses cookies. By continuing to use this website you are agreeing to our use of cookies. 

Dataset

 

Chapter 9 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 9.6 (v20220721)

Status: Ongoing
Online Status: ONLINE
Publication State: Citable
Publication Date: 2023-02-03
DOI Publication Date: 2023-05-15
Download Stats: last 12 months
Dataset Size: 28 Files | 6MB

Abstract

Data for Figure 9.6 from Chapter 9 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 9.6 shows ocean heat content (OHC) and its changes with time.

---------------------------------------------------
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:
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.

---------------------------------------------------
Figure subpanels
---------------------------------------------------
The figure has 8 panels labelled (a)-(g), with data provided for all panels using this lettering system in the GitHub repository linked in the documentation.

---------------------------------------------------
List of data provided
---------------------------------------------------
This dataset contains:

- (a) Time series of global OHC anomaly relative to a 2005–2014 climatology in the upper 2000 m of the ocean, combining observations (Ishii et al., 2017; Baggenstos et al., 2019; Shackleton et al., 2020), model-observation hybrids (Cheng et al., 2019; Zanna et al., 2019), and multi-model means from CMIP6, historical (29 models) and SSP scenarios.

- Maps of OHC from CMIP6 ensemble bias and observed (Ishii et al., 2017) trends of OHC for 0–700 m for the period 1971–2014 (b, c)

- Maps of OHC from CMIP6 ensemble bias and observed (Ishii et al., 2017) trends of OHC for 0–2000 m for the period 2005–2017 (e, f).

- Projected rate of change 2015–2100 for (d) SSP5-8.5 and (g) SSP1-2.6 scenarios from CMIP6 ensemble means.

- Projected change in 0–700 m OHC for (d) SSP1-2.6 and (g) SSP5-8.5 in the CMIP6 ensembles, for the period 2091–2100 versus 2005–2014.

Label subscripts in (a) indicate number of models per SSP.
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)

---------------------------------------------------
Data provided in relation to figure
---------------------------------------------------
Data provided in relation to Figure 9.6

- Data file: Fig9-6a_data_CMIPlikelybounds.nc:
- Data file: Fig9-6a_data_CMIPmean.nc:
- Data file: Fig9-6a_data_HybridChengmean.nc:
- Data file: Fig9-6a_data_HybridZannamean.nc:
- Data file: Fig9-6a_data_Observedlikelybounds.nc:
- Data file: Fig9-6a_data_Observedmean.nc:
- Data file: Fig9-6a_data_paleo.nc:
- Data file: Fig9-6a_data_ssp126likelybounds.nc:
- Data file: Fig9-6a_data_ssp126mean.nc:
- Data file: Fig9-6a_data_ssp126verylikelybounds.nc:
- Data file: Fig9-6a_data_ssp245likelybounds.nc:
- Data file: Fig9-6a_data_ssp245mean.nc:
- Data file: Fig9-6a_data_ssp245verylikelybounds.nc:
- Data file: Fig9-6a_data_ssp370likelybounds.nc:
- Data file: Fig9-6a_data_ssp370mean.nc:
- Data file: Fig9-6a_data_ssp370verylikelybounds.nc:
- Data file: Fig9-6a_data_ssp585likelybounds.nc:
- Data file: Fig9-6a_data_ssp585mean.nc:
- Data file: Fig9-6a_data_ssp585verylikelybounds.nc:
- Data file: Fig9-6b_data.nc:
- Data file: Fig9-6c_data.nc:
- Data file: Fig9-6d_data.nc:
- Data file: Fig9-6e_data.nc:
- Data file: Fig9-6f_data.nc:
- Data file: Fig9-6g_data.nc:

OHC stands for Ocean Heat Content.
CMIP6 is the sixth phase of the Coupled Model Intercomparison Project.
SSP stands for Shared Socioeconomic Pathway.
SSP585 is the Shared Socioeconomic Pathway which represents the upper boundary of radiative forcing and development scenarios, consistent with RCP8.5.
SSP126 is the Shared Socioeconomic Pathway which represents the lower boundary of radiative forcing and development scenarios, consistent with RCP2.6.

---------------------------------------------------
Notes on reproducing the figure from the provided data
---------------------------------------------------
OHC maps and OHC timeseries were plotted using standard matplotlib software - code is available via the link in the documentation.

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 given here: https://github.com/BrodiePearson/IPCC_AR6_Chapter9_Figures/blob/main/Plotting_code_and_data/Fig9_03_SST/Plot_Figure/Example_plotting_from_metadata.m

---------------------------------------------------
Sources of additional information
---------------------------------------------------
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 output data for this figure, contained in a dedicated GitHub repository.

Citable as:  Yu, Y.; Hua, L.; Mix, A.; Pearson, B. (2023): Chapter 9 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 9.6 (v20220721). NERC EDS Centre for Environmental Data Analysis, 15 May 2023. doi:10.5285/439ccb0b0eb04c17b5c6897fb9cb550b. https://dx.doi.org/10.5285/439ccb0b0eb04c17b5c6897fb9cb550b
Abbreviation: Not defined
Keywords: IPCC-DDC, IPCC, AR6, WG1, WGI, Sixth Assessment Report, Working Group 1, Physical Science Basis, Ocean Heat Content, OHC

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

Abstract

Ocean heat content (OHC) and its changes with time. (a) Time series of global OHC anomaly relative to a 2005–2014 climatology in the upper 2000 m of the ocean. Shown are observations (Ishii et al., 2017; Baggenstos et al., 2019; Shackleton et al., 2020), model-observation hybrids (Cheng et al., 2019; Zanna et al., 2019), and multi-model means from the Coupled Model Intercomparison Project Phase 6 (CMIP6) historical (29 models) and Shared Socio-economic Pathway (SSP) scenarios (label subscripts indicate number of models per SSP). (b–g) Maps of OHC across different time periods, in different layers, and from different datasets/experiments. Maps show the CMIP6 ensemble bias and observed (Ishii et al., 2017) trends of OHC for (b, c) 0–700 m for the period 1971–2014, and (e, f) 0–2000 m for the period 2005–2017. CMIP6 ensemble mean maps show projected rate of change 2015–2100 for (d) SSP5-8.5 and (g) SSP1-2.6 scenarios. Also shown are the projected change in 0–700 m OHC for (d) SSP1-2.6 and (g) SSP5-8.5 in the CMIP6 ensembles, for the period 2091–2100 versus 2005–2014. 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: OHC_ChangeRate
  • var_id: OHC_LGM_Likely_lower
  • var_id: OHC_LGM_Likely_upper
  • var_id: OHC_LGM_Mean
  • var_id: OHC_LGM_VeryLikely_lower
  • var_id: OHC_LGM_VeryLikely_upper
  • var_id: OHC_LIG_Likely_lower
  • var_id: OHC_LIG_Likely_upper
  • var_id: OHC_LIG_Mean
  • var_id: OHC_LIG_VeryLikely_lower
  • var_id: OHC_LIG_VeryLikely_upper
  • var_id: OHC_MH_Mean
  • var_id: OHC_MH_max
  • var_id: OHC_MH_min
  • var_id: OHC_Trend
  • var_id: OHC_anomaly
  • var_id: OHC_bias
  • var_id: Time

Co-ordinate Variables

Coverage
Temporal Range
Start time:
1971-01-01T00:00:00
End time:
2100-12-31T23:59:59
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°