NASA Data Confirms the Last Decade Was the Hottest on Record

16 Janvier, 2020, 02:07 | Auteur: Therese Cote
  • Temperature above or below the 1950-1981 average in kelvins

While the three different research agencies all have slightly different figures for the past 12 months, the WMO has carried out an analysis that uses additional data from the Copernicus climate change service and the Japan Meteorological Agency.

Schmidt said Earth as a whole is probably the hottest it has been during the Holocene - the past 11,500 years or so - meaning this could be the warmest period since the dawn of civilization.

The past five years, and past decade were also the warmest on record in terms of ocean heat content, that study showed. #NASA and @NOAA work together to track temperatures around the world and study how they change from year to year.

While natural variability means that scientists don't expect new temperature records year-on-year, the Met Office is forecasting that 2020 will also be very hot, with the global average temperature estimated to be 1.1C above pre-industrial levels.

Globally the past five years stand out as the hottest five on record, almost 1.7 degrees (0.9 C) warmer than the 20th century average.

The records, which scientists began compiling in 1880, show that the last five years have been the planet's warmest, with 2016 now topping the list by just 0.07 of a degree Fahrenheit.

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Scientists have concluded that the increase in temperatures mostly has been driven by increased emissions into the atmosphere of carbon dioxide and other greenhouse gases produced by human activities.

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A year ago saw the second highest average global temperatures in records dating back to the 19th century, evidence from multiple data sets suggests.

According to NOAA, the past five years have been the hottest five ever, nearly 1.7 degrees (0.9 C) warmer than the average in the 20th century. "But humans are not responsible for why 2016 was warmer than 2015 or why 2019 was warmer than 2018".

NASA estimates that the average global temperature change is accurate to 0.1°F with A 95% level of certainty. That report found the global long-term average temperature will increase an average of 2.7 degrees Fahrenheit - or 1.5 degrees Celsius - by 2035 at the current rate of warming.

2020 has heightened concerns over continued warming.

A United Nations climate agency says 2019 was the second hottest year on record.

"Australia had its hottest, driest year on record in 2019, setting the scene for the massive bushfires which were so devastating to people and property, wildlife, ecosystems and the environment", Taalas said.

WMO Secretary-General Petteri Taalas warns that a lot of extreme weather is expected throughout 2020 and the coming decades, fueled by record levels of heat-trapping greenhouse gases in the atmosphere.

Advocacy group 350 Canada, in a tweet, said the need for urgent action to address the climate crisis, including Green New Deal legislation and making those most responsible pay, is clear.

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