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Posted on January 19, 2018
Courtesy of NOAA
January 18, 2018 -- After three consecutive years of record-high temperatures for the globe, Earth was a slightly cooler planet in 2017. But not by much.
Earth’s globally averaged temperature for 2017 made it the third warmest year in NOAA’s 138-year climate record, behind 2016 (warmest) and 2015 (second warmest).
However, unlike the past two years, Earth’s average temperature in 2017 was not influenced by the warming effect of an El Nino, say scientists from NOAA's National Centers for Environmental Information (NCEI).
A color-coded map of the globe showing areas of percentiles of cool and warmth -- ranging from record warm to record cool -- for the calendar year 2017. (NOAA NCEI)
The average temperature across the globe in 2017 was 1.51 degrees F above the 20th century average of 57 degrees F. 2017 marks the 41st consecutive year (since 1977) with global land and ocean temperatures at least nominally above the 20th-century average. The six warmest years on record for the planet have all occurred since 2010.
Sea ice extent (coverage) at the poles remained low throughout last year. Antarctica had a record-low extent in 2017, while the Arctic had its second-lowest ice coverage on record.
In a separate analysis of global temperature data released at the same time, NASA scientists ranked 2017 as the second warmest year on record. The minor difference in rankings is due to the different methods used by the two agencies to analyze global temperatures; though over the long term, the agencies’ records remain in strong agreement. Both analyses show that the five warmest years on record all have taken place since 2010.
A map of the globe of that indicates noteworthy climate and weather events that occurred around the world in 2017. (NOAA NCEI)
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