November 2015 is second-warmest in known history, NASA says, as this year stays on track for record warmth
November 2016 was the second-warmest November in recorded history, NASA’s Goddard Institute for Space Studies announced last week, with an average global temperature that was less than one-tenth of a degree Celsius lower than the record-setter of 2015.
Last month was also 0.95 degrees Celsius (1.71 degrees Fahrenheit) warmer than the average November during the years between 1951-1980 and kept Earth on the path to the warmest year the planet has experienced in the 136 years in which consistent weather records have been maintained.
November 2015 was 1.02 degrees Celsius warmer than the mean for the month during that 29-year period.
The National Oceanic & Atmospheric Administration announced Monday that, according to its calculations, November 2016 was the fifth-warmest in recorded history. NOAA said that last month’s average global temperature was 0.72 degrees Celsius (1.31 degrees Fahrenheit) above the norm for the month.
NOAA’s assessment of the month’s place in climate history is based on 122 years of records.
As the year approaches its end, there is little doubt that it will be the warmest known in either 122 or 136 years. NOAA’s statement explained that this year’s average temperature to date is 0.94 degrees Celsius (1.69 degrees Fahrenheit) above the mean for the past 122 years, while NASA’s methods indicate that the year-to-date mean temperature is 1.02 degrees Celsius (1.84 degrees Fahrenheit) above that for the period 1951-1980.
Earth’s Arctic region has been the part of the planet where warmth has been most pronounced this year.
NOAA’s 2016 Artic Report Card, which the agency released earlier this month, indicated that the extent of summer sea ice in the region this year was tied with 2007 for the second-lowest since 1979 and that average surface air temperatures there in the year that ended on Sept. 30 were the highest since at least 1900.
The mean air temperature in the Arctic has warmed by 3.5 degrees Celsius (6.3 degrees Fahrenheit) since 1900, a pace that is twice as fast as that experienced by the rest of Earth.
The continental United States experienced warmer temperatures than normal for the first 11 months of this year from coast-to-coast and from northern border to southern border. This graphic, prepared by the National Centers for Environmental Information, shows that no region in the mainland U.S. experienced an average temperature that is lower than the mean of the past 122 years: