According to some analyses published by scientists around the world last week, 2020 has officially become one of the hottest years on record, which is a sign of unabated global warming.
The high temperature record came a year after the climate catastrophe interrupted: historic heat waves, hurricanes and wildfires.
The Secretary-General of the World Meteorological Organization, Petri Talas, said in a statement: “This clearly shows that the global signal of man-made climate change is now as powerful as the force of nature.”
These analyses differ on whether 2020 is the hottest year on record. A report released by NASA on Thursday found that 2020 defeated 2016 by a narrow margin and became the warmest year ever. Efficiently tie records. Another analysis, Released on Thursday The US National Oceanic and Atmospheric Administration concluded that 2020 will follow 2016.Last week, the European Union’s Copernicus Climate Change Service Linked to 2016 As the warmest year.
The conclusion is slightly different because the research team applied different techniques to piece together a global temperature map based on the temperature observations of thousands of weather stations.
The 2020 high temperature record is only the latest record in a series of high temperature years.
“The past seven years have been the hottest seven years on record,” said Leslie Ott, a NASA researcher. Therefore, no matter where the individual years are, “the consistency of the hottest years on record in recent years is very, very obvious,” she said.
For all these analyses, “the difference between 2020 and 2016 is less than the uncertainty in the record,” Zeke Hausfather, a climate scientist at the independent research team Berkeley Earth, told BuzzFeed News via email. “So it’s actually the warmest tie.”
Most of the time in 2020 will be scorching heat, and it is not until the end that it becomes slow due to the natural cooling phenomenon of La Niña.
Taras said: “Despite the La Niña phenomenon, it will have a temporary cooling effect, but 2020 will still be extremely hot.”
Climate change drives other major high temperature records in 2020.
Siberia experienced a months-long heat wave. The Arctic town of Verkhoyansk had its hottest day on record, reaching 100 degrees Fahrenheit on June 20. “If there is no human-induced climate change, this event is practically impossible,” a team of scientists to sum up.
According to Copernicus’ analysis, 2020 is the hottest year on record in Europe, 1.6 degrees Celsius higher than the average temperature from 1981 to 2010. This record was maintained before 2019, and the observed temperature was 0.4 degrees Celsius higher than the same period.
Last year also marked The busiest known hurricane season in the Atlantic, And historically A series of wildfires that destroyed the western United States. The result is that the United States has experienced Disasters of up to one billion dollars In 2020.This year also started some The worst forest fire in Australian historyIn addition, the level of carbon dioxide in the atmosphere continues to climb, reaching a new maximum of 413 parts per million in May last year.
At the same time, the pandemic triggered an economic shock, resulting in U.S. emissions are expected to fall by 10.3% In 2020, according to the preliminary analysis of the research institution Rongding Group, some The downward trend in global emissions last year was even greaterBut the short-term decline in emissions is not enough to curb the global warming trend-this will require long-term emissions reductions.
“Most of the warming we see is due to human emissions of greenhouse gases,” Otter said.