Why does the snow in the Alps turn pink?

' Pink snow ' has been found on the Presena Glacier, part of the Alps. The snow is said to indicate the effects of climate change, and researchers are investigating the cause.

Algae turns Italian Alps pink, prompting concerns over melting | World news | The Guardian
https://www.theguardian.com/world/2020/jul/06/algae-turns-italian-alps-pink-prompting-concerns-over-melting

Mysterious Emergence of Pink Ice in The Alps Could Have Dire Consequences
https://www.sciencealert.com/italy-s-alps-have-turned-pink-prompting-an-investigation-into-the-sudden-algal-bloom

Biagio Dimauro of the National Research Council of Italy found that 'the same algae found in the dark zones of Greenland are the result of a survey of 'pink snow' observed in Presena Glacier, Italy. 'It's more likely,' 'algae are not dangerous, a natural phenomenon that occurs more often in spring and summer in mid-latitude lands, but is also found in high-latitude lands such as Poland.'

Glacial ice on Italy's Alps turn pink, caused by algae that accelerate the effects of #ClimateChange . #PinkIce pic.twitter.com/a4mhNEbNtK

— News Daily 24 (@nd24_news) July 6, 2020

The cause of 'pink snow' is a kind of alga called 'Ancylonema nordenskioeldii'. This alga is also found in Greenland. Greenland and Presena Glacier, where Ancylonema nordenskioeldii was found, have a common point: 'melting snow.'

Ice normally reflects more than 80% of the solar radiation, but the appearance of algae reduces its reflectivity and absorbs more heat, resulting in faster melting of the snow. This is the reason why the snow melts quickly in the land where 'pink snow' occurs.

The faster the ice melts, the more water and air that are essential to the growth of algae, and the more algae are produced. This is the mechanism by which pink snow grows on the Presena Glacier in Passogavi, at an altitude of 2681 meters.

In Italy Are Scientists Investigating The Mysterious Appearance Of Pink Glacial Ice In The Alps, Caused By Algae That Accelerate The Effects Of Climate Change. Https://T.Co/93GZGJakm5 Pic.Twitter.Com/3tzNH4llqx

— The Philippine Star (@PhilippineStar) July 6, 2020

'Everything that darkens the color of snow accelerates the removal of snow because it accelerates the absorption of radiant heat.' 'We are trying to quantify the impact of non-human phenomena on global warming. Masu”.

A research paper published in 2017 suggests that a collection of microorganisms, including algae, contributed to more than one-sixth of the snow removal.