October global recap, one of the warmest on record

November 21, 2017 0 Comments

 

Even with a La Nina pattern in place in the Pacific Ocean, 2017 is running much warmer than normal across the globe.  That was also the case for October 2017.  NOAA’s review of the temperature data places October 2017 as the 4th warmest on record.  Meanwhile NASA’s Goddard Institute for Space Studies (GISS) places October 2017 as the 2nd warmest on record globally, just behind 2015.  They had October 2016 ranked 3rd warmest.

Detailed Look at October 2017 Temperature (from NOAA)

Map of global temperature percentiles for October 2017
  • The October temperature across global land and ocean surfaces was 1.31°F above the 20th century average of 57.1°F, tying with 2003 as the fourth highest value for October in the 138-year period of record, behind 2015 (highest), 2014 (second highest), and 2016 (third highest). The October 2017 above-average global land and ocean temperature was mainly driven by warmer ocean temperatures. October 2017 marks the 41st consecutive October and the 394th consecutive month with temperatures at least nominally above the 20th century average.
  • The October globally averaged land surface temperature was 1.78°F above the 20th century average of 48.7°F. This value was the 11th highest October land global temperature in the 1880–2017 record.
  • The October globally averaged sea surface temperature was 1.13°F above the 20th century monthly average of 60.6°F. This was the fourth highest global ocean temperature for October in the record, behind 2015 (highest), 2016 (second highest), and 2014 (third highest).

October 2017 Sea Ice and Snow Cover

Maps of Arctic and Antarctic sea ice extent in October 2017
  • The average Arctic sea ice extent for October was 633,000 square miles (19.6 percent) below the 1981–2010 average, according to analysis by the National Snow and Ice Data Center using data from NOAA and NASA. Sea ice extent was below average throughout much of the Arctic, particularly in the Chukchi, Kara, and Barents Seas. Overall, this was the fifth smallest October extent since records began in 1979.
  • Antarctic sea ice extent during October 2017 was 160,000 square miles (2.2 percent) below the 1981–2010 average, also the fifth smallest October value on record. On October 11 and 12, the Antarctic sea ice extent reached its annual maximum extent at 6.96 million square miles. This was the second smallest Antarctic sea ice extent maximum on record and tied with 2002 as the latest date of occurrence.
  • According to data from NOAA and analyzed by the Rutgers Global Snow Lab, the Northern Hemisphere snow cover extent during October was 1.4 million square miles above the 1981–2010 average. This was the ninth largest October Northern Hemisphere snow cover extent in the 50-year period of record. The North American snow cover extent was the seventh largest on record, while the Eurasian snow cover extent was the 11th largest.

Year-to-Date (January–October 2017)

Map of global temperature percentiles for January to October 2017
  • The year-to-date temperature across global land and ocean surfaces was 1.55°F above the 20th century average of 57.4°F. This was the third highest value for January–October in the 1880–2017 record, behind the record year of 2016 and 2015 (second highest). Nine of the ten warmest January–October global land and ocean temperatures occurred since 2005.
  • The year-to-date globally averaged land surface temperature was 2.39°F above the 20th century average of 48.7°F. This was the second highest for January–October in the 138-year record, behind 2016 by 0.32°F.
  • The year-to-date globally averaged sea surface temperature was 1.22°F above the 20th century average of 61.0°F. This was the third highest for January–October in the record, behind 2016 (highest) and 2015 (second highest).

For the year to date, GISS has 2017 ranked as 2nd warmest behind 2016.  They had 2015 as 3rd warmest.

About the Author:

StormTrak9 Meteorologist with WAOW-TV in Wausau, WI. Also the owner of Great Lakes Weather Service, LLC.

Leave a Reply