An Italian Glacier Is Turning Pink
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A glacier in Italy is turning pink because of algae.

Pink snow has appeared at the Presena glacier in northern Italy, researcher Biagio Di Mauro, of the Institute of Polar Sciences at Italy’s National Research Council, told CNN Monday.

While “watermelon snow,” as it is sometimes known, is fairly common in the Alps in spring and summer, it has been more marked this year.

When Di Mauro went to the glacier on Saturday to investigate, “there was quite an impressive bloom of snow algae,” he said.

pink colored snow
An aerial picture taken above the Presena glacier near Pellizzano, shows pink colored snow, supposedly due to the presence of colonies of algae of the species Ancylonela nordenskioeldii from Greenland, Italy, on July 3, 2020. (Miguel Medina/AFP via Getty Images)

He told CNN he believes an alga named Chlamydomonas nivalis is responsible for the change in color.

This spring and summer have seen low snowfall and high atmospheric temperatures, Di Mauro said, adding, “This creates the perfect environment for the algae to grow.”

Algal blooms are bad news for the health of the glacier as darker snow absorbs more energy, meaning it melts faster.

“It is for sure bad for the glacier,” Di Mauro said.

The phenomenon has been particularly common this year, said Di Mauro, who plans to study it in more detail to work out the concentration of the algae and map the blooms using satellite data.

pink snow-Italy
Biagio di Maio, researcher at CNR (National Research Council) takes samples of pink colored snow on the top of the Presena glacier near Pellizzano, Italy, on July 4, 2020. (Miguel Medina/AFP via Getty Images)

Di Mauro has previously studied the Morteratsch glacier in Switzerland, where an alga called Ancylonema nordenskioeldii has turned the ice purple.

This alga has also been found in southwestern Greenland as well in as the Andes and Himalayas.

The CNN Wire contributed to this report