The average world temperature from 2015 to 2019 is set to become the highest in any five-year period in history, the UN announced in eve of a meeting of world leaders about the weather.
"It is currently estimated that we are 1.1 ° C above the preindustrial era (1850-1900) and + 0.2 ° C above 2011-2015," says the World Meteorological Organization (WMO) report "United in Science".
The latest data confirm the trend of the previous four years, which have been the hottest since 1850, when world average temperature began to be recorded.
July 2019 when several hot flashes affected Europe, was the hottest month in history.
But there are regional disparities: the poles heat up faster and coastal areas are threatened before other regions.
"The effects of climate change are not felt equally," says British weather agency chief scientist Stephen Belcher.
"Some countries experience some effects, such as more intense heat waves or more severe flooding, earlier than others," he adds.
The report, published two days after the major student demonstrations by the weather across the planet and on the eve of the world leaders meeting in New York for the UN Annual General Assembly, takes stock of states' lack of action to reduce greenhouse gas emissions.
And scientists are even "conservative," said one of the study's coordinators, Leena Srivastava. In fact, the rulers "must act much more urgently," he said in presenting the report on Sunday.
No setback in emissions
The list of bad news about the state of the planet is long and detailed in the WMO document.
Scientists say rising sea levels accelerate and the pace has increased over the past decade to four millimeters per year instead of three as a result of the accelerating melting of the polar ice caps in the North and South, confirmed by numerous satellite studies and analysis. .
Coal, oil and gas industries continued to advance in 2018. Greenhouse gas emissions have also increased and by 2019 they will be "at least as high" as last year, predict the scientists who coordinated the report.
Atmospheric CO2 concentration is expected to reach a new record by the end of the year, 410 particles per million, according to preliminary data.
For Professor Dave Reay of the University of Edinburgh, this is the worst news of the report.
"It's like getting a credit card account after five years of unpaid spending," he wrote. And following the banking metaphor, he adds: "We have reached the world maximum of our carbon credit. If emissions do not start falling, the price will be hell."
At the present stage of countries' commitments to reduce greenhouse gas emissions, the planet will be 2.9ºC to 3.4ºC. hotter until 2100.
Scientists believe that countries' CO2 efforts should be multiplied by five to contain global warming at + 1.5 ° C, as predicted by the 2015 Paris Agreement. Or at least by three to contain rising temperatures. + 2ºC, the upper limit stipulated by the agreement.
"The gap has never been so big between what the world wants to achieve and the climate reality of the countries," the document highlights.
This is the loophole that UN Secretary-General Antonio Guterres wants to address at the climate meeting convened for Monday, which is expected to bring together nearly 60 rulers.
Guterres believes that several leaders must promise to achieve carbon neutrality by 2050.
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