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climate change

Vital indicators of climate change

Global temperature


Global mean temperature in 2017 was about 1.1 °C above pre-industrial levels. 2015, 2016 and 2017 were the three warmest years on record. The five-year mean temperature for 2013-2017 was also the highest on record.

Global mean temperature anomalies

Global mean temperature anomalies (relative to 1850-1900) from various independent datasets.
(Source: WMO Statement on the State of the Global Climate in 2017)

Global temperature datesets

  1. European Centre for Medium-Range Weather Forecasts
  2. Hadley Centre/Climate Research Unit of the University of East Anglia (UK)
  3. Japan Meteorological Agency
  4. US National Aeronautics and Space Administration
  5. US National Oceanic and Atmospheric Administration