The National Center for Atmospheric Research (NCAR) released a study on Friday of millions of readings, going back as far as 1950, from 1800 weather stations throughout the United States, which show a significant increase of record high temperatures in relation to record low temperatures. As noted in a press release about the findings: “[I]f temperatures were not warming, the number of record daily highs and lows being set each year would be approximately even.”
Instead, the study shows that record highs are outpacing the record low temperatures by roughly 2 to 1. The authors of the study cite this as a clear indication of climate change, which will continue if greenhouse gas emissions are not reduced.