By Mathew Barlow
The reds (on the map) indicate temperatures warmer than the 1981-2010 average and the blues indicate temperatures colder than the 1981-2010 average. (The 1981-2010 period is the current international reference period.) You’ll notice a lot of red.
While temperatures for any specific location and any particular month are strongly influenced by weather and natural climate variability, the fact that the map shows mostly warmer-than-average temperatures is due to human-caused climate change.
Read the full blog entry on the UML Weather Center blog.