2020 among the top three hottest years on record, rivalling 2016, scientists say

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Last year rivalled 2016 for the warmest on record, as global temperatures were measured to be nearly 1.3C hotter than pre-industrial times, scientists have said.

Warming

Analysis of international data by the World Meteorological Organisation (WMO) found that 2020 was one of the three warmest years on record, with the trio all falling within the last decade.

One of the datasets was UK-based analysis by the Met Office, University of East Anglia (UEA) and the UK National Centre for Atmospheric Science, which said 2020 was the second hottest year on record, averaging around 1.28C above levels seen in the second half of the 19th century.

This is just a fraction of a degree below the record year of 2016, when they were 1.29C above pre-industrial levels.

United Nations secretary-general Antonio Guterres said the WMO findings represented:

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yet another stark reminder of the relentless pace of climate change, which is destroying lives and livelihoods across our planet.

It came following a 12 months which saw wildfires in America and Australia ravaging through vast swathes of natural habitat, while cyclones, floods, and storms battered communities across the planet.

The UK felt the effects of Storm Ciara and Storm Alex, which caused flooding and power cuts as record amounts of rain fell, while temperatures reached in excess of 30C for several days during the height of summer, all considered to be a consequence of climate change.

Summer weather June 23rd 2020
People headed for Bournemouth beach as Britain experienced a summer heatwave (Andrew Matthews/PA)

“Catastrophic temperature rise”

The WMO report said it was “remarkable” that temperatures in 2020 were virtually on a par with 2016. This was despite the presence last year of the naturally occurring climate cooling phenomenon known as La Nina.

Guterres said:

We are headed for a catastrophic temperature rise of three to 5C this century. Making peace with nature is the defining task of the 21st century. It must be the top priority for everyone, everywhere.

Australia bushfires
Bushfires, including this one in New South Wales, Australia, ravaged the planet in 2020 (CPOA Brett Kennedy/Commonwealth of Australia/PA)

Under the international Paris Agreement, countries have pledged to limit warming to 2C above pre-industrial levels, and to pursue efforts to keep temperature rises to 1.5C to avoid the worst impacts of climate change.

The hottest year on record, 2016, saw a strong El Nino, the opposite phenomenon, which boosts temperatures on top of human-caused global warming.

In 2020 there was notable regional warmth in northern Asia, stretching up into the Arctic, parts of eastern Europe and Central America.

Dr Colin Morice, senior scientist in the Met Office’s climate monitoring team, said:

2020 has proved to be another notable year in the global climate record. For the global average temperature in 2020 to be yet another warm year, the second warmest on record even when influenced by a slight La Nina, is a sign of the continued impact of human induced climate change on our global climate.

With all datasets showing a continued rise in global average temperature, the latest figures take the world one step closer to the limits stipulated by the Paris Agreement.

Fossil fuels

Tim Osborn, director of UEA’s Climatic Research Unit, said:

For the last 50 years, our global climate has been warming at about 0.2C each decade. This underlying warming, due primarily to society’s use of coal, oil and gas, is what matters for monitoring climate change and tracking our progress against the goals of the Paris Agreement, more so than the warmth of an individual year.

Nevertheless, it is notable that we have just experienced, globally, the second warmest year of the warmest decade on record.

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