Data are included from the GISS Surface Temperature (GISTEMP) analysis and the global component of Climate at a Glance (GCAG). Two datasets are provided: 1) global monthly mean and 2) annual mean temperature anomalies in degrees Celsius. The GISTEMP data are available from 1880 to the present, while the GCAG data are available from 1850 to the present.

Data

Description

1. GISTEMP Global Land-Ocean Temperature Index:

Combined Land-Surface Air and Sea-Surface Water Temperature Anomalies [i.e. deviations from the corresponding 1951-1980 means]. Global-mean monthly [...] and annual means, 1880-present, updated through most recent month.

1. Global component of Climate at a Glance (GCAG):

Global temperature anomaly data come from the Global Historical Climatology Network-Monthly (GHCN-M) data set and International Comprehensive Ocean-Atmosphere Data Set (ICOADS), which have data from 1880 to the present. These two datasets are blended into a single product to produce the combined global land and ocean temperature anomalies. The available timeseries of global-scale temperature anomalies are calculated with respect to the 20th century average [...].

Citations

1. GISTEMP: NASA Goddard Institute for Space Studies (GISS) Surface Temperature Analysis, Global Land-Ocean Temperature Index.
2. NOAA National Climatic Data Center (NCDC), global component of Climate at a Glance (GCAG).

Sources

• Name: GISTEMP Global Land-Ocean Temperature Index
• Web: https://data.giss.nasa.gov/gistemp/

• Name: Global component of Climate at a Glance (GCAG)
• Web: https://www.metoffice.gov.uk/hadobs/hadcrut5/data/HadCRUT.5.0.2.0/download.html

Additional Data

• Upstream datasets:
  • GHCN-M
  • ERSST
  • ICOADS
• Other:
  • HadCRUT5

Preparation

Requirements

Python 3 is required for data preparation.

Processing

Locally

Run the following script from this directory to download and process the data:

make data

Automated Workflow

Current script is automated using Github Workflows

Hundredths of degrees Celsius in the GISTEMP Global Land-Ocean Temperature Index data are converted to degrees Celsius.

A HadCRUT4 processing script is available but not run by default.

Resources

The processed data are output to ./data.

License

ODC-PDDL-1.0

This Data Package and these datasets are made available under the Public Domain Dedication and License v1.0 whose full text can be found at: http://www.opendatacommons.org/licenses/pddl/1.0/

References

1. Morice, C. P., Kennedy, J. J., Rayner, N. A., Winn, J. P., Hogan, E., Killick, R. E., et al. (2021). An updated assessment of near-surface temperature change from 1850: the HadCRUT5 data set. Journal of Geophysical Research: Atmospheres, 126, e2019JD032361. https://doi.org/10.1029/2019JD032361

2. GISTEMP Team. (2024). GISS Surface Temperature Analysis (GISTEMP), version 4. NASA Goddard Institute for Space Studies. Dataset accessed 20YY-MM-DD at https://data.giss.nasa.gov/gistemp/.

3. Lenssen, N., Schmidt, G. A., Hendrickson, M., Jacobs, P., Menne, M., & Ruedy, R. (2024). A GISTEMPv4 observational uncertainty ensemble. Journal of Geophysical Research: Atmospheres, 129(17), e2023JD040179. https://doi.org/10.1029/2023JD040179.

Notes

The upstream datasets do not impose any specific restrictions on using these data in a public or commercial product:

• GHCN-N
• ERSST
• ICOADS