Independent observations corroborate surface air temperature record



One of the most important foundations of scientists' understanding of global climate change is the land surface air temperature record, the long-term observations of air temperature measured 2 meters above the ground. These observations have been made around the world, for more than a century in some places. The air temperature records have shown a long-term warming trend due mainly to anthropogenic climate change, and variability seen in the air temperature record is used to guide models of the future climate.