Every early summer, the snow in the Alps turns red. A phenomenon known as ‘blood snow‘ behind which is a algathe ‘sanguina nivaloides’, which changes its original green color to red “to protect yourself from the intensity of radiation according to researcher Eric Marechal, who details that the algae “accumulates a red pigment that surpasses the green one”.
Scientists are now busy collecting samples because the glacier is melting and they have discovered that the algae does not bring good news. “When the level of CO2 increases in the atmosphere, we find more. It is probably related to global warming“, says the researcher Alberto Amato.
In addition, experts believe that the reddish color accelerates the defrosting process, because the pigment reduces the snow’s ability to reflect the sun. Thus, the ‘blood snow’ is one of the visible wounds of the climate emergency. “We see it more and more and more,” warns Marechal.
A mysterious phenomenon that raises questions such as where these algae come from and since when do they dye glaciers red. Already a book of 1786 of trips through the Alps collected this phenomenon, strange then, and now, more and more frequent.