Changes in Temperature and Timing for Lake in the Contiguous U.S.

A map of CONUS using angled wheat field vectors to compare lake growing degree days between the past (1981-1990) and present (2011-2020). The vectors are mapped to the number of growing degree days earlier or later on the x-axis, and the difference in temperature on the y-axis, resulting in vector angles spanning 360 degrees. The map shows that the SE has strong directional changes towards earlier and warmer GDD. The NE and upper midwest trend towards warmer and later GDD. Western states of UT, WY, ID, and MT all have trends towards later, with colder temperatures in some areas. Along the west coast, this pattern switches to earlier and warmer. The data are from doi.org/10.5066/P9CEMS0M