2020 likely world’s second hottest year, U.N. says

This year is on track to be the second hottest on record, behind 2016, the World Meteorological Organization (WMO) said on Wednesday. Five data sets currently place 2020, a year characterised by heatwaves, droughts, wildfires and raging hurricanes, as the second warmest since records began in 1850.

“2020 is very likely to be one of the three warmest years on record globally,” the Geneva-based U.N. agency said in its State of the Global Climate in 2020 report.

Stoked by extreme heat, wildfires flared across Australia, Siberia and the United States this year, sending smoke plumes around the globe. U.N. Secretary-General Antonio Guterres said in a speech at Columbia University in New York that human-caused greenhouse gas emissions are to blame and policies have yet to rise to the challenge. “To put it simply the state of the planet is broken,” Guterres said. “Humanity is waging war on nature. This is suicidal,” he said.

A less visible sign of change was a surge in marine heat to record levels, with more than 80% of the global ocean experiencing a marine heatwave, the WMO said. “2020 has, unfortunately, been yet another extraordinary year for our climate,” said WMO Secretary-General Petteri Taalas, urging more efforts to curb the emissions.

Greenhouse gas concentrations climbed to a new record in 2019 and have risen so far this year despite an expected drop in emissions due to COVID-19 lockdowns, the WMO said last month. The latest WMO report said the global mean temperature was around 1.2 degrees Celsius above the 1850-1900 baseline between January and October this year, placing it second behind 2016 and marginally ahead of 2019.

Hot years have typically been associated with El Niño, a natural event that releases heat from the Pacific Ocean. However, this year coincides with La Niña which has the opposite effect and cools temperatures.

2020 likely world’s second hottest year, U.N. says, Reuters, Dec 3