Many US weather stations show cooling with flat maximum temperatures, according to a new study in the Journal of Climate. According to Anthony Watts, the study confirms that warming temperatures in the U.S. over the past 100 years are “all about nighttime influence on minimum temperatures, mostly due to the heat sink effect of urbanization and nearby structures and paving.” One fascinating chart at the link shows the extent to which the artificial “adjustments” to temperature history made by NOAA have distorted the reported temperature trend.