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Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 2.12 (v20220701)

Update Frequency: Not Planned
Latest Data Update: 2022-07-05
Status: Ongoing
Online Status: ONLINE
Publication State: Citable
Publication Date: 2023-05-11
DOI Publication Date: 2023-07-03
Download Stats: last 12 months
Dataset Size: 3 Files | 26KB


Data for Figure 2.12 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 2.12 shows changes in temperature through the troposphere and stratosphere, both on near-global scales and in the tropics.

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.

Figure subpanels
The figure has 5 subpanels, with data provided for panel a.

List of data provided
This dataset contains observed temperature anomaly trends for 2002-2019 from the ROM SAF dataset, plotted as a trend/height/latitude contour plot.

Data provided in relation to figure
Data provided in relation to Figure 2.12:

- Data file: tdry_trends filled contours plot
- Data file: lrt_temprature_altitude grey line

ROM SAF stands for Radio Occultation Meteorology Satellite Application Facilities.

Notes on reproducing the figure from the provided data
Panel (a) is plotted using standard matplotlib software.
There are notes guiding the user to reproduce the figure in the code associated to this dataset. Link to the code that reproduces the figure in the Related Documents section of this catalogue record.

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 2)
- Link to the Supplementary Material for Chapter 2, which contains details on the input data used in Table 2.SM.1
- Link to input data figure 2.12.
- Link to the code for the figure, archived on Zenodo.

Citable as:  Ladstädter, F.; Trewin, B. (2023): Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 2.12 (v20220701). NERC EDS Centre for Environmental Data Analysis, 03 July 2023. doi:10.5285/e9f67cfb456845b3b406328c6ae43e2d.
Abbreviation: Not defined
Keywords: IPCC-DDC, IPCC, AR6, WG1, WGI, Sixth Assessment Report, Working Group 1, Physical Science Basis, upper-air temperature, tropospheric temperature, stratospheric temperature


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:
Data are netCDF formatted

Process overview

This dataset was generated by the computation detailed below.

Caption for Figure 2.12 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6)


Temperature trends in the upper air. (a) Zonal cross-section of temperature anomaly trends (2007–2016 baseline) for 2002–2019 in the upper troposphere and lower stratosphere region. The climatological tropopause altitude is marked as a grey line. Significance is not indicated due to the short period over which trends are shown, and because the assessment findings associated to this figure relate to difference between trends at different heights, not the absolute trends. (b, c) Trends in temperature at various atmospheric heights for 1980–2019 and 2002–2019 for the near-global (70°N–70°S) domain. (d, e) as for (b, c) but for the tropical (20°N–20°S) region. Further details on data sources and processing are available in the chapter data table (Table 2.SM.1).

Input Description


Output Description


Software Reference


  • units: m
  • var_id: altitude
  • long_name: Altitude above geoid
  • units: Pa
  • var_id: pressure
  • long_name: Approximate, climatological pressure
  • var_id: tdry_trends
  • long_name: Dry temperature anomaly trends
  • units: K/decade
  • units: m
  • var_id: lrt_temperature_altitude
  • long_name: Lapse Rate Tropopause Altitude
  • units: degrees_north
  • var_id: latitude_bins
  • long_name: Latitude of bin center

Co-ordinate Variables

Temporal Range
Start time:
End time:
Geographic Extent