Warming World [newscientistapps.com], developed by Chris Amico and Peter Aldhous for the New Scientist, shows the distribution of ambient temperatures around the world, ranging from 1951 to now. The graphs and maps highlight the changes relative to the average temperatures measured between 1951 to 1980.
Users can click anywhere on the map and investigate an entire temperature record for that grid cell, retrieved via NASA's surface temperature analysis database GISTEMP, which is based on 6000 monitoring stations, ships and satellite measurements worldwide. Via the drop-down list at the top, users can also switch between different map overlays that summarize the average temperatures for different 20-year pictures. Accordingly, climate change become visible as the cool blue hues from previous decades are replaced with warm red and yellow hues around the start of the 20th Century.
Accordingly, this tool aims to communicate the reality and variability of recorded climate change, and compare that local picture with the trend for the global average temperature..
The accompanying article can be found here.