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Last Updated: 19 March 2024

The State of the Global Climate 2023 report shows that records were once again broken, and in some cases smashed, for greenhouse gas levels, surface temperatures, ocean heat and acidification, sea level rise, Antarctic sea ice cover and glacier retreat.

Heatwaves, floods, droughts, wildfires, and rapidly intensifying tropical cyclones caused misery and mayhem, upending everyday life for millions and inflicting many billions of dollars in economic losses.

The WMO report confirmed that 2023 was the warmest year on record, with the global average near-surface temperature at 1.45 °Celsius (with a margin of uncertainty of ± 0.12 °C) above the pre-industrial baseline. It was the warmest ten-year period on record.

Key messages
  • State of Global Climate report confirms 2023 as the hottest year on record by a clear margin
  • Records broken for ocean heat, sea level rise, Antarctic sea ice loss and glacier retreat
  • Extreme weather undermines socio-economic development
  • Renewable energy transition provides hope
  • The cost of climate inaction is higher than the cost of climate action

The publication provides a summary on the state of the climate indicators in 2023 with sections on key climate indicators, extreme events and impacts. The indicators include global temperatures, greenhouse gas concentration, ocean heat content, sea level rise, ocean acidification, Arctic and Antarctic sea ice, Greenland ice sheet and glaciers and snow cover, precipitation and stratospheric ozone, with an analysis of major drivers of inter-annual climate variability during the year including the El Niño Southern Oscillation and other ocean and atmospheric indices. The highlighted extreme events include those related to tropical cyclones and wind storms; flooding, drought and extreme heat and cold events. The publication also provides the most recent findings on climate-related risks and impacts including food security and population displacement.

Source: https://library.wmo.int/viewer/68835/?offset=#page=1&viewer=picture&o=bookmark&n=0&q=