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Increase in Percent of Very Warm Nights

Increase in Percent of Very Warm Nights

The graph shows the observed and projected change in percent of very warm nights from the 1950-1990 average in the United States. Under the lower emissions scenario,1 the percentage of very warm nights is projected to increase about 20 percent by 2100. Under the higher emissions scenario,1 it is projected to increase by about 40 percent.2 The shaded areas show the likely ranges while the lines show the central projections from a set of climate models. The projections appear smooth because they show the calculated average of many models.  Image Source: adapted from CCSP SAP 3.32



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