Last year flirted with the heat records, since it is finally the second highest since the start of the surveys in 1850, was recorded last year, confirms the World Meteorological Organization (WMO) United Nations agency for meteorology. Average temperature across the globe increased between 1.05 ° C and 1.2 ° C last year compared to the pre-industrial era, according to five different sources compiled by the WMO. The Geneva agency uses two datasets from the United States, provided by the Goddard Institute of NASA and those of the American Administration for the Ocean and the Atmosphere (NOAA), the information communicated by the meteorological office (Met Office) combined with those of the University of East Anglia. Finally, the WMO compiles Japanese and European Union statistics provided by Copernicus and the European Center for Medium-Term Weather Forecasting. The latter had reached the same conclusions last week.
Average temperatures last year were slightly lower than in 2016, which was made worse by a strong El Niño weather phenomenon.
We expect to see many extreme weather events in 2020
Petteri Taalas, Secretary General of the WMO.
The WMO specifies that the average over the last five years is the highest measured, like that over the last decade. Each ten-year period breaks the previous decade’s record since the early 1980s. “Unfortunately, we expect to see many extreme weather events in 2020 and over the next few decades, fueled by record high levels of greenhouse gases. that trap heat in the atmosphere, ”warns WMO Secretary General Petteri Taalas. CO concentration2
in the atmosphere has reached a new peak since the start of the industrial era in 2019.
A rise from 3 ° C to 5 ° C at the end of the century
In addition, “more than 90% of excess heat (linked to warming) is stored in the seas around the world, where it accumulates and causes increases in ocean temperature,” say American researchers in the journal. Advances in Atmospheric Sciences. They point out that the temperature increased further last year, as it did in previous years.