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Uploaded on Nov 10, 2009
Twice as many record-breaking high temperatures have been set compared to record lows across the U.S. in recent decades (see http://www.ucar.edu/news/releases/200... ). For future climate, computer models show the ratio climbing to 20:1 by 2050 and 50:1 by 2100.
Day-to-day variability means we still get record cold days, but the record highs are far exceeding the lows.
Gerald "Jerry" Meehl is an NCAR senior scientist. His research includes connecting the solar cycle to subtle changes in weather and climate on Earth; examining the consequences of global warming, including heat waves, droughts, storms, and other weather extremes; regional climate change; and El Niño and other influences of the tropics on global climate.