https://phys.org/news/2019-01-colorado-lake-dillon-rapidly.html

"The warming of Lake Dillon is a result of climate change but, in contrast with warm lakes, which respond in undesirable ways to warming, Lake Dillon shows no environmental response to warming," said William Lewis, Director of the CIRES Center for Limnology and lead author of the new paper published today in AGU's Water Resources Research. "The explanation for the lake's ecological stability lies in its low temperature, which serves as a buffer against ecological effects of warming."

Since 1981, Lewis and colleagues in the CIRES Center for Limnology have collected detailed information not only on Lake Dillon's temperature, but also on its water quality and aquatic life. Full vertical profiles of water temperature document changes in vertical distribution of heat over time. The record shows that warming of tributary water contributes to warming of the lake's deepest waters.