Scientists probe link between ‘snow blood’ and climate change

CHAMONIX , June 21 — Standing on a snowy mountainside about 2,500 metres above sea level, Eric Marechal holds up a crimson test-tube. Inside is an algae sample known as “snow blood,” a phenomenon that accelerates Alpine thaw and that scientists worry is spreading.

Alberto Amato, researcher in genetics at the Cell and Plant Physiology Laboratory at CEA, takes a sample of Sanguina nivaloides algae, also known as ‘snow blood’ and which presence accelerates snowmelt, at the Brevent in Chamonix, France, June 14, 2022. — Reuters pic “There’s a double reason” for studying the algae, Marechal explained. “The first is that’s it is an area that is little-explored and the second is that this little explored area is melting before our eyes so it’s urgent,” he said.

Research is ongoing and what is certain is that the presence of the algae accelerates snow-melt, since algae’s pigment reduces its ability to reflect the sun’s heat.

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