 Left panel: map of temperatures of rivers . Note that the trends of river water temperatures are not directly comparable within rivers or to lakes, since time periods are not consistent across river studies. Right panels  and  depict water temperature trends along a latitudinal gradient highlighting the above average warming rates in northern Polar Regions . Data sources for lakes: . Data sources for rivers: .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report