World Meteorological Organization Confirms 2017 Among the Three Warmest Years on Record

18 January 2018 (WMO) – In a clear sign of continuing long-term climate change caused by increasing atmospheric concentrations of greenhouse gases, 2015, 2016 and 2017 have been confirmed as the three warmest years on record. 2016 still holds the global record, whilst 2017 was the warmest year without an El Niño, which can boost global annual temperatures.

In addition to the global warming due to rising greenhouse gas levels in the atmosphere, the climate also has a naturally occurring variability due to phenomena such as El Niño, which has a warming influence, and La Niña, which has a cooling influence.

The strong 2015/2016 El Niño contributed to the record temperature in 2016. By contrast, 2017 started with a very weak La Niña and also finished with a weak La Niña.

“Temperatures tell only a small part of the story. The warmth in 2017 was accompanied by extreme weather in many countries around the world. The United States of America had its most expensive year ever in terms of weather and climate disasters, whilst other countries saw their development slowed or reversed by tropical cyclones, floods and drought,” said Taalas.

WMO will issue its full Statement on the State of the Climate in 2017 in March.  This report will provide a comprehensive overview of temperature variability and trends, high-impact events, and long-term indicators of climate change such as increasing carbon dioxide concentrations, Arctic and Antarctic sea ice, sea level rise and ocean acidification.

The final statement will include information submitted by a wide range of United Nations agencies on human, socio-economic and environmental impacts as part of a drive to provide a more comprehensive, United Nations-wide policy brief for decision makers on the interplay between weather, climate and water and the United Nations global development goals.