"We end up with an attribution of these trends to human activity pretty much at the 100 per cent level. all of the trends are effectively anthropogenic (man-made) at this point", director of NASA's Goddard Institute for Space Studies Gavin Schmidt said.
Taalas said on Wednesday that since modern records began in 1850, the average global temperature had risen by around 1.1 degrees Celsius, and warned of significant warming in the future.
"Human-caused climate change is responsible for the long-term warming - it's responsible for why the 2010s were warmer than 2000s, which were warmer than the 1990s, etc.", Texas A&M University climate scientist Andrew Dessler said in an email.
The details: The report added that warming has been particularly pronounced during the last five years, and that every decade since the 1960s has been hotter than the last.
The World Meteorological Organisation -an agency of the United Nations - which based its findings on analysis of leading worldwide datasets, said increases in global temperatures had already had dire consequences, pointing to "retreating ice, record sea levels, increasing ocean heat and acidification, and extreme weather".
Scientists say climate change likely contributed to severe weather in 2019 such as a heatwave in Europe and Hurricane Dorian which killed at least 50 people when it barreled through the Bahamas in September.
"Last decade was the hottest on record".
While the Earth is getting warmer on average, the effect isn't evenly distributed throughout the planet.
"It's sobering to think that we might be breaking global temperature records in quick succession", said Georgia Tech climate scientist Kim Cobb.
"Global warming is continuing and is very clearly distinguishable from the noise of the global climate system", he said. The year 1998 is the only twentieth-century year among the 10 warmest years on record.
These showed that the average global temperature in 2019 was 1.1 degrees Celsius above pre-industrial levels, creeping towards a globally agreed limit after which major changes to life on Earth are expected.
Scientists said the the decade-long data is more telling than the year-to-year measurements, where natural variations such as El Nino, the periodic warming of the Pacific Ocean, come into play. In the U.S., Alaska, Georgia and North Carolina felt the highest average temperatures on record with overall above-average temperatures in most of the country.
The years 2017, 2015, and 2018 followed closely behind in third, fourth, and fifth place, respectively, NOAA reported.
The previous year the earth was cooler than the average of the 20th century was 1976, before the Democratic presidential candidate Pete Buttigieg, French President Emmanuel Macron and Donald Trump Jr. were born. As the space agency pointed out, this warming resulted in 2019's unprecedented fires and the ramped-up melting of Greenland's vast ice sheet.
Data from the US National Oceanic and Atmospheric Administration meanwhile revealed that polar sea ice coverage continued its downward trend in 2019.
"The planet has a fever", Salas said, "and that's its symptom".