2017 was among the planet's hottest years on record, government scientists report

2017 was second-warmest year on record - UN

The NASA report showed that previous year was the third in a row in which temperatures hit new highs, following a decades-long trend of sweltering seasons.

A separate analysis by the National Oceanic and Atmospheric Administration pegged 2017 as the third-warmest year on record.

Previous year was the second or third warmest on record behind 2016, and the hottest without an extra dose of heat caused by an El Nino event in the Pacific Ocean, the United Nations says.

It added that 2016 remains the hottest year ever measured, due to the warming effect of El Nino, while 2017 was the warmest non-El Nino year beating out 2015 by less than one hundredth of a degree.

Last year was indistinguishable, so far, from 2015 as the second or third warmest behind 2016, making 2017 "the warmest year without an El Nino", the UN's World Meteorological Organisation (WMO) said. "What we're seeing is an increasing string of years of temperatures more than 1 degree above the pre-industrial era".

The globally averaged temperature in 2017 was about 0.46C above the 1981-2010 long-term average (14.3C), according to the UN's meteorologists.

The difference may seem slight, but scientists say even minor changes in global temperature can have a major impact on the global climate and melting arctic ice can cause higher sea levels, impacting millions.

NASA uploaded its 2017 data set here, if you're curious.

During 2017, the average temperature across global land and ocean surfaces was 1.51 degrees above the 20th-century average, according to NOAA. The institution compares current deviations from a baseline of temps recorded from 1951 to 1980.

Gavin Schmidt, director of NASA's Goddard Institute for Space Studies, said correspondents on Thursday, "The planet is warming remarkably uniformly".

The globe hasn't had a cooler-than-average year since 1976 - a stretch of 41 consecutive warm years - NOAA said.

The restored data of climate shift, made by human discharges of greenhouse gases, occurs as the Trump government proposes to prepare fresh fields for oil drilling and moves back laws that attempted to decrease global warming, most prominently by pushing to abolish the Obama government's Clean Power Plan.

An analysis of five worldwide datasets revealed that the global average surface temperature in 2017 was roughly 1.1C above the pre-industrial era.

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