Milan Radisics / Aerial shot of a mass of calved ice in a meltwater lake beneath Fjallsarlon Glacier, southern Iceland, August 2018.

Michel Roggo / Meltwater channel through icefield in the Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Erlend Haarberg / Meltwater from Engenbreen glacier, Meloy, Nordland, Norway, August.

Terry Whittaker / Timelapse of icebergs moving in Jokulsarlon glacial lagoon at twilight, formed from meltwater from the retreating Vatnajokull glacier, Iceland, July 2012.

Terry Whittaker / Timelapse of icebergs moving in Jokulsarlon glacial lagoon at twilight, formed from meltwater from the retreating Vatnajokull glacier, Iceland, July 2012.

Terry Whittaker / Timelapse of icebergs moving in Jokulsarlon glacial lagoon formed from meltwater from the retreating Vatnajokull glacier, Iceland, July 2012.

Matthias Breiter / Meltwater lakes on Hubbard Glacier, Wrangell-St. Elias National Park, Alaska

Bryan and Cherry Alexander / Meltwater pouring off iceberg above hole. Scoresbysund Fiord, East Greenland, September 2005.

Juan Carlos Munoz / River patterns from melting glacier. Olfusa river, Southwest Iceland, July 2009

Juan Carlos Munoz / River patterns from melting glacier. Olfusa river, Southwest Iceland, July 2009

Juan Carlos Munoz / River patterns from melting glacier. Olfusa river, Southwest Iceland, July 2009

Juan Carlos Munoz / River patterns from melting glacier. Markarfljot river, South Iceland, July 2009