Researchers are trying to understand what drives the algal blooms that tinge ice—and have implications for the drought-stricken American West’s water supply.
The scientists used the device to record the snow’s albedo, a measure of what fraction of the sunlight beaming down is reflected back up. Red snow means lower albedo, which means more absorbed sunlight and faster snowmelt. Other factors also influence albedo, including dirt, dust and ash from wildfires. Sand from the Gobi Desert can blow all the way to the Pacific Northwest, while dust from the shrinking Great Salt Lake sometimes coats the Wasatch Mountains.
Later that day, in a lab at the University of Montana’s Flathead Lake Biological Station, Elser and Almela Gomez would use the samples to test which inputs help snow algae grow. They’ll melt the snow, mix it together, and add nutrients like nitrogen and phosphorus. Then, after five to 10 days under grow lights in a cold incubator, they’ll measure the chlorophyll levels to see how much the algae grew.
The team’s work is part of the small but growing field of snow algae research. The scientists hope to figure out what allows snow algae to thrive, and where it’s most likely to live., a citizen science initiative created by Western Washington University researchers, asked skiers, climbers and hikers to help collect pink snow samples. Scientists have also converged on surging algal blooms in the French Alps.
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