These data from the US National Oceanic and Atmospheric Agency (NOAA) once again underline the extent of global warming, experts have hammered.
And they confirm the major trend observed by the analyzes of the American Space Agency (NASA), made public simultaneously, as well as those of the European Copernicus Earth observation service, revealed on Monday.
Despite slight differences in their rankings, all of these agencies tell the same story, namely
that the planet has warmed dramatically, told a press conference Russell Vose, head of climate monitoring for the NOAA.
all driven by rising concentrations of heat-trapping gases, such as CO2, he added.
The past eight years are the warmest on record since records began in 1880, according to theNOAA.
And the 9 years from 2013 to 2021 are among the top 10; the tenth is also recent, since it is 2010 (ninth position).
According toNOAA, 2021 is in sixth place.
The average temperature recorded last year was 1.04°C higher than the pre-industrial era (1880-1900).
However, the objective of the Paris agreement is to limit global warming to an increase of 2°C, and if possible to an increase of 1.5°C, compared to the pre-industrial era.
°C”,”text”:”At some point during the 2030s, or certainly by the early 2040s, the global average temperature increase will almost certainly exceed 1.5°C “}}”>At some point during the 2030s, or indeed by the early 2040s, the global average temperature increase will almost certainly exceed 1.5°C, said Russell Vose.
The emission reduction commitments made by the various countries, including those announced at COP26 in November, leave the world for the moment on a warming trajectory of 2.7°C, a level qualified as
catastrophic by the UN.
The 2021 average was pulled down by the La Niña weather phenomenon, which tends to cool temperatures.
But theNOAA points out that the average land surface temperature in the northern hemisphere last year was listed as the third highest since 1880.
And the average size of Arctic sea ice was the ninth smallest since records began in 1979. Sea ice tends to melt a little faster each year in the summer, and replenish a little less in the winter. .
The warming in the Arctic is about three times faster than the warming of the entire planet, pointed out Gavin Schmidt, of the Goddard Institute of the US Space Agency, during the same press conference. This accentuates the rise in water levels and the release of CO2.
The European service Copernicus on Monday ranked the year 2021 in fifth place, but it is not uncommon for agencies to present slight differences in their data, due to different methodologies.
They agree that 2016 remains the hottest year on record.
According to Russell Vose, the year 2022 has% chance”,”text”:”99% chance”}}’>99% chance to also rank among the top ten.
The current global warming is clearly attributable to human activities and in particular to fossil fuels (gas, oil, coal). It has the consequence of amplifying extreme climatic phenomena.
We have reached a stage where global warming data is no longer an esoteric or academic measure of what is happening, but is reflected in the weather and events we see., said Gavin Schmidt.
The year 2021 has thus seen Siberia and California ravaged by flames, spectacular floods in Germany, Belgium, Australia and China, as well as an extraordinary heat wave in Canada.
While some weather events are difficult to link directly to climate change, others can now be clearly attributed to it, such as the heat wave over western North America last summer.
Kristina Dahl, a climate scientist with the Union of Concerned Scientists, reacted to the release of the report on Thursday:
What terrifies me about this latest data […] is that they are no longer even surprising or shocking, she said in a statement, calling on politicians to take firm action.
Temperatures will continue to rise as long as we continue to increase the amount of greenhouse gases in the atmosphere, hammered Gavin Schmidt.