Scientists Study an Organism That Turns Snow Red
2022-06-27
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1Scientists are trying to learn more about microorganisms that turn snow red and might cause snow to melt faster.
2Recently, researcher Eric Marechal collected what he called "snow blood" from a mountain area 2,500 meters above sea level.
3Snow blood is a kind of algae that is red. Its dark color causes snow to melt more easily.
4Scientist are concerned that the algae are spreading.
5"These algae are green. But when it's in the snow, it accumulates a little pigment like sunscreen to protect itself," said Marechal.
6He is the research director at Grenoble's Scientific Research National Center.
7He and his coworkers collected algae to study in the laboratory on Le Brevent Mountain near the town of Chamonix in France.
8The red-colored organism was formally identified and given its scientific name Sanguina nivaloides in 2019.
9Scientists are now trying to understand snow blood.
10Snow volume is decreasing because of rising global temperatures.
11This change in climate is especially affecting the Alps Mountains.
12There is a "double reason" for studying the algae, Marechal explained.
13"The first is that it's 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.
14Alberto Amato is a researcher at CEA Center in Grenoble.
15He said the volume of algae appear to be growing because of climate change.
16He said algae grow faster with higher amounts of carbon dioxide in the atmosphere.
17The research is ongoing. But the scientists say it is clear that the presence of algae speeds the melting of snow.
18This is because algae's color reduces snow's ability to reflect the sun's heat.
19Other kinds of algae, including a purple kind, as well as soot from forest fires have the same effect.
20If the algae do spread, snow and glacier melt around the world could speed up.
21"The warmer it is, the more algae there are and the more the snow melts quickly," said Amato.
22"It's a vicious circle and we are trying to understand all the mechanisms to understand this circle so we can try to do something about it," he added.
23I'm Dan Novak.
1Scientists are trying to learn more about microorganisms that turn snow red and might cause snow to melt faster. 2Recently, researcher Eric Marechal collected what he called "snow blood" from a mountain area 2,500 meters above sea level. Snow blood is a kind of algae that is red. Its dark color causes snow to melt more easily. 3Scientist are concerned that the algae are spreading. 4"These algae are green. But when it's in the snow, it accumulates a little pigment like sunscreen to protect itself," said Marechal. He is the research director at Grenoble's Scientific Research National Center. He and his coworkers collected algae to study in the laboratory on Le Brevent Mountain near the town of Chamonix in France. 5The red-colored organism was formally identified and given its scientific name Sanguina nivaloides in 2019. 6Scientists are now trying to understand snow blood. Snow volume is decreasing because of rising global temperatures. This change in climate is especially affecting the Alps Mountains. 7There is a "double reason" for studying the algae, Marechal explained. "The first is that it's 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. 8Alberto Amato is a researcher at CEA Center in Grenoble. He said the volume of algae appear to be growing because of climate change. He said algae grow faster with higher amounts of carbon dioxide in the atmosphere. 9The research is ongoing. But the scientists say it is clear that the presence of algae speeds the melting of snow. This is because algae's color reduces snow's ability to reflect the sun's heat. 10Other kinds of algae, including a purple kind, as well as soot from forest fires have the same effect. If the algae do spread, snow and glacier melt around the world could speed up. 11"The warmer it is, the more algae there are and the more the snow melts quickly," said Amato. "It's a vicious circle and we are trying to understand all the mechanisms to understand this circle so we can try to do something about it," he added. 12I'm Dan Novak. 13Dan Novak adapted this story for VOA Learning English based on reporting from Reuters. 14________________________________________________________________________ 15Words in This Story 16accumulate - n. to increase slowly over time 17pigment- n. a natural substance that gives color to animals or plants 18volume - v. the amount of something 19reflect - v. to have lights bounce a surface and travel in the opposite direction 20soot - v. the black powder that is the result of burning things 21vicious - v. bad or severe 22mechanism - n. a process that produces a specific result