The past nine years are among the ten hottest on record

These data from the US National Oceanic and Atmospheric Agency (NOAA) once again underscore the extent of global warming, experts hammered.

And they confirm the great trend observed by the analyzes of NASA, made public simultaneously, as well as those of the European service Copernicus of observation of the Earth, revealed Monday.

Despite slight differences in their rankings, all of these agencies tell the same story, namely “that the planet has warmed dramatically,” Russell Vose, head of climate monitoring at NOAA.

And “all of this is 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 NOAA.

And the nine years from 2013 to 2021 are part of the “top 10” – the missing tenth year not going far back, since this is 2010 (ranked ninth).

According to NOAA, 2021 is in sixth place.

The average temperature recorded last year was thus 1.04 ° C higher than the pre-industrial era (1880-1900).

However, the objective of the Paris agreement is to contain the warming “clearly” below + 2 ° C, and if possible at + 1.5 ° C, compared to the pre-industrial era.

“At some point in the 2030s, or arguably by the early 2040s, the global average temperature will almost certainly exceed 1.5 ° C,” said Russell Vose.

The emission reduction commitments made by the various countries, including those announced at the COP26 in November, currently leave the world on a warming trajectory of 2.7 ° C, a level described as “catastrophic. “by the UN.

2016 still in the lead

The 2021 average was pulled down by the La Nina weather phenomenon, which tends to cool temperatures.

But NOAA 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 Arctic sea ice size was the ninth smallest since surveys began in 1979. The 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, said Gavin Schmidt of the Goddard Institute at NASA at the same press conference. This accentuates the rising waters and the release of CO2.

The European service Copernicus had ranked the year 2021 in fifth place on Monday, but it is not uncommon for agencies to have 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 a “99% chance” of also ranking in the “top 10”.

“Even more surprising”

The current global warming is clearly attributable to human activities and in particular to fossil fuels (gas, oil, coal). Its consequence is to amplify extreme climatic phenomena.

“We have reached a point where the data on global warming is no longer an esoteric or academic measure of what is happening, but is reflected in the weather and the events that we see,” said Gavin Schmidt.

The year 2021 thus saw Siberia and California ravaged by flames, spectacular floods in Germany and Belgium, Australia and China, a delirious heatwave 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 this summer.

Kristina Dahl, climatologist at the “Union of Concerned Scientists”, reacted Thursday to the publication of the report: “What terrifies me about these latest data (…) is that they are no longer even surprising or shocking “she said in a statement, calling on politicians to take” resolute “action.

“Temperatures will continue to rise as long as we continue to increase the amount of greenhouse gases in the atmosphere,” hammered Gavin Schmidt.

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