This animation shows annual temperatures each year since 1880 compared to the twentieth-century average, ending with record-warm 2016. Because of global warming due to increasing greenhouse gases, the maps from the early years in the animation are dominated by shades of blue, indicating temperatures were up to 3°C (5.4°F) cooler than the twentieth-century average. Recent years’ maps are dominated by shades of red.
The data come from NOAA’s climate.gov which …
“provides science and information for a climate-smart nation. Americans’ health, security, and economic well-being are closely linked to climate and weather. People want and need information to help them make decisions on how to manage climate-related risks and opportunities they face. NOAA Climate.gov is a source of timely and authoritative scientific data and information about climate. Our goals are to promote public understanding of climate science and climate-related events, to make our data products and services easy to access and use, to provide climate-related support to the private sector and the Nation’s economy, and to serve people making climate-related decisions with tools and resources that help them answer specific questions.”