Since AR5, evidence of changes in the temperature of lakes and rivers has continued to increase. Global warming rates for lake surface waters were estimated as 0.21°C-0.45ºC per decade between 1970 and 2010, exceeding sea-surface temperature  trends of 0.09°℃ per decade between 1980 and 2017  . Warming of lake surface water temperatures was variable within regions  but more homogeneous than deep-water temperature changes . Because temperature trends in lakes can vary vertically, horizontally and seasonally, complex changes have occurred in the amount of habitat available to aquatic organisms at particular depths and temperatures .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report