Europe endured record heat and rainfall last year while temperatures in Arctic Siberia soared off the charts, the European Union's climate monitoring service reported Thursday.
The continent in 2020 was nearly half a degree Celsius hotter than the next warmest year, according to the Copernicus Climate Change Service (C3S).
That means Europe was more than 2C warmer than in a world unaltered by carbon emissions from burning fossil fuels -- and far above the temperature limits enshrined in the Paris climate accord.
The 2015 treaty enjoins nearly 200 nations to cap global warming at ‘well below’ two degrees compared to mid-19th century levels, and 1.5C if possible.
Globally, average surface temperatures have risen about 1.2C above the pre-industrial benchmark, the report noted.
The six years since 2015 are the warmest on record, as are 20 of the last 21, clear evidence of a feverish planet.
‘The trend over three years, five years, ten years is unequivocal,’ Jean-Noel Thepaut, director of the European Centre for Medium-Range Weather Forecasts, which includes C3S, told AFP.
‘This is the big picture. It is urgent to act.’
On current trends, heatwaves could make large swathes of the tropics unliveable by mid-century, and sea level rise could displace tens, perhaps hundreds of millions of people, scientists warn.
‘Looking at temperature on a global scale, the last 10 to 15 years have shown an acceleration, it's the same for sea level,’ Thepaut said in an interview.
‘For other indicators it is less clear, but all the trends are going in the wrong direction.’
In the Autumn and Winter of 2020, Europe was not only warmer than usual but wetter, especially across its north-central regions.
Early October brought storm Alex, the first of the 2020-21 winter storm season.
- 'A spectacular year' –
Exceptionally abundant rainfall broke one-day records in Britain, northwestern France and in the southern Alps.
The French and Italian sides of the Maritime Alps saw daily deluges reaching more than three times the typical average for the entire month in some places.
Rivers overflowing their banks in several regions of western Europe resulted in devastating floods.
And if Europe got warmer, the data showed the roof of the world was on fire -- literally, in some areas.
‘One region in particular sticks out,’ Freja Vamborg, lead author of the report and CS3 senior scientist, told reporters. ‘The Arctic really saw a spectacular year.’
For the Arctic as a whole, 2020 was the second warmest year on record, with surface temperature 2.2C above the 1981-2010 average, and about 3C higher than pre-industrial levels.
Over northern Siberia, the thermometer climbed more than 6C above the late-20th century benchmark for the year as a whole, with dry conditions and record-breaking fire activity during summer, including so-called ‘zombie fires’ that reignited after laying dormant over winter.
For the adjacent Arctic Seas, sea ice was at a record low for most of the summer and autumn.
‘It was by far the warmest year on record in Arctic Siberia,’ Vamborg said.
Atmospheric concentrations, meanwhile, of the main greenhouse gases carbon dioxide (CO2) and methane (CH4) each increased by about half a percent to their highest levels ever.
The amount of CO2 in the atmosphere has now risen 50 percent compared to preindustrial times, to about 516 parts per million (ppm).
The 2021 European State of the Climate report is the fourth put out by the EU's climate monitoring service.
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