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Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - Input data for Figure 2.16 (v20220630)

Update Frequency: Not Planned
Latest Data Update: 2022-07-01
Status: Ongoing
Online Status: ONLINE
Publication State: Citable
Publication Date: 2023-09-26
DOI Publication Date: 2023-09-26
Download Stats: last 12 months
Dataset Size: 10 Files | 40MB


Input data for Figure 2.16 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 2.16 provides global precipitation minus evaporation trend maps and time series from a variety of data sources

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 four panels, with input data provided for all panels in the main directory

List of data provided
The datasets contains:

- Global precipitation and evaporation data from ERA5 reanalysis
- Time series of global, land-only and ocean-only average annual P–E (mm day–1) from the following reanalysis products: 20CRv3, ERA5, ERA20CM, MERRA, CFSR, ERA20C, JRA55 and MERRA2.

Data provided in relation to figure
Panel a:
- Data files: and

Panel b:
- Data file: GPME2.csv and GPME2.mat

Panel c:
- Data file: LPME2.csv and LPME2.mat

Panel d:
- Data file: OPME2.csv and OPME2.mat

For panels b to d:
I.     Column 2: orange solid line
II.    Column 3: cyan solid line
III.   Column 4: black solid line
IV.   Column 5: grey solid line
V.    Column 6: blue solid line
VI.   Column 7: dark green solid line
VII.  Column 8: brown solid line
VIII. Column 9: green solid line

20CRv3 is the NOAA-CIRES-DOE Twentieth Century Reanalysis Version 3.
ERA5 is a reanalysis of the global climate from 1950 to present, developed by ECMWF.
ERA20CM is a twentieth century atmospheric model ensemble developed by ECMWF.
MERRA stands for Modern-Era Retrospective analysis for Research and Applications.
CFSR stands for Climate Forecast System Reanalysis.
ERA20C is the first atmospheric reanalysis of the 20th century, from 1900-2010, developed by ECMWF.
JRA55 stands for Japanese 55-year Reanalysis.
MERRA2 stands for Modern-Era Retrospective analysis for Research and Applications, version 2.

Notes on reproducing the figure from the provided data
Additional information to correctly reproduce the figure in the corresponding readme files for code archived on Zenodo (see the link to code provided 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 the code for the figure, archived on Zenodo.

Citable as:  Rivera, J.A.; Bosilovich, M. (2023): Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - Input data for Figure 2.16 (v20220630). NERC EDS Centre for Environmental Data Analysis, 26 September 2023. doi:10.5285/2a1284ec9d564f679480ee013b733ae1.
Abbreviation: Not defined
Keywords: IPCC-DDC, IPCC, AR6, WG1, WGI, Sixth Assessment Report, Working Group 1, Physical Science Basis, global precipitation minus evaporation


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


Changes in precipitation minus evaporation. (a) Trends in precipitation minus evaporation (P–E) between 1980 and 2019. Trends are calculated using OLS regression with significance assessed following AR(1) adjustment after Santer et al. (2008) (‘x’ marks denote non-significant trends). Time series of (b) global, (c) land-only and (d) ocean-only average annual P–E (mm day–1). Further details on data sources and processing are available in the chapter data table (Table 2.SM.1).

Input Description


Output Description


Software Reference


  • var_id: evap
  • standard_name: water_evaporation_flux
  • long_name: Evaporation
  • units: mm/dy
  • standard_name: precipitation_flux
  • long_name: Precipitation
  • var_id: tp
  • units: mm/dy

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • long_name: latitude
  • var_id: lat
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • var_id: lon
  • standard_name: time
  • var_id: time
  • units: months
Temporal Range
Start time:
End time:
Geographic Extent