Earth’s surface temperature has surged high into uncharted territory, thanks to a record-strength El Niño event combined with the long-term rise in temperatures due to human-caused global warming: October 2015 was Earth’s warmest month on record by a huge margin, according to data released by NOAA's National Centers for Environmental Information (NCEI) on Wednesday. October 2015 was the second consecutive month with a new all-time warmest month record: September 2015 previously held the record for the largest positive departure of temperature from average of any month among all 1630 months in the historical record that began in January 1880.
| Bulletin of the American Meteorological Society
EEE 2015: Multimodel Assessment of Anthropogenic Influence on Record Global and Regional Warmth During 2015
Jan 13, 2017 | NASA, NOAA
NASA, NOAA Analyses Reveal Record-Shattering Global Temperatures
Jan 11, 2017 | BBC News
Climate change: 2015 'shattered' global temperature record by wide margin
Jan 10, 2017 | Mashable
2015 was officially the warmest year. 2016 will likely be hotter.