QUICK FACTS
The place is it? Yellowstone Nationwide Park, Wyoming [44.46284445, -110.3628428]
What’s within the photograph? A superbly white blanket of snow overlaying Yellowstone Lake
Who took the photograph? An unnamed astronaut on board the Worldwide Area Station (ISS)
When was it taken? Jan. 26, 2022
This eye-catching astronaut photograph exhibits Yellowstone’s eponymous lake coated in a thick blanket of snow, making it seem like a colorless, featureless void within the surrounding panorama. However beneath this freezing, clean expanse lies a number of the most lively and hottest hydrothermal vents anyplace on Earth.
The lake freezes over each winter, round late December or early January, with an ice sheet that ranges from a number of inches to round 2 toes (0.6 m) thick. However the blanket of snow on high of this ice can attain as much as 3.5 toes (1.1 m) deep by March, in line with NASA’s Earth Observatory. The lake is often snow- and ice-free by late Might or early June.
The thick overlaying of snow means Yellowstone Lake is remarkably resilient to human-caused local weather change, sustaining its floor ice thickness regardless of rising atmospheric temperatures. This makes it a significant outlier amongst high-altitude lakes throughout the globe.
This astronaut photograph exhibits one in all these deep snowdrifts, principally undisturbed other than a number of islands, the most important of which is Stevenson Island.
Whereas the floor of Yellowstone Lake could appear chilly and lifeless throughout the winter months, the water beneath stays surprisingly gentle because of a collection of hydrothermal vents throughout its ground. This permits aquatic animals, together with the lake’s cutthroat trout (Oncorhynchus clarkii) inhabitants — the most important of its form anyplace in North America — to outlive the lengthy months beneath the ice, in line with NPS.
One of many vents, proper subsequent to Stevenson Island, releases water that’s a exceptional 345 levels Fahrenheit (174 levels Celsius), making it hotter than Outdated Trustworthy and each different geyser or sizzling spring in Yellowstone Nationwide Park.
“That is a lot hotter than any floor sizzling spring at Yellowstone as a result of the load from the overlying lake water acts like a stress cooker lid and permits temperatures increased than boiling to be reached,” representatives from the U.S. Geological Survey wrote in an article in regards to the lake’s vents. “These are the most popular hydrothermal vents measured in a lake anyplace on the earth.”
The vents are powered by a large blob of magma, round 2.6 miles (3.8 km) beneath Yellowstone Nationwide Park, which incorporates a shocking quantity of molten rock. This magma blob acts just like the cap on a huge volcanic bottle and can someday explode, unleashing a “supervolcanic” eruption that could possibly be felt throughout the continent.
Yellowstone Lake was shaped shortly after the same eruption 640,000 years in the past, which carved out the 1,500-square-mile (3,900 sq. kilometers) caldera that the lake at the moment sits inside. Round 130,000 years in the past, a smaller eruption then carved out the doorknob-shaped deal with of the lake, dubbed West Thumb (seen close to the highest of the astronaut photograph).
For extra unimaginable satellite tv for pc photographs and astronaut pictures, take a look at our Earth from area archives.
