Recent reports confirm the presence of extraordinary “rainbow clouds,” also known as polar stratospheric clouds (PSC), in the Arctic region. This phenomenon first appeared on December 18th due to an extremely cold wave and delighted observers until December 20th. However, experts say that similar events may occur in the coming months.
PSC clouds have been observed in various locations, including Norway, Sweden, Finland, Alaska, and even Scotland. The vibrant colors observed in the sky have been described as truly spectacular. Photographer Ramunė Šapailaitė captured the essence of these intense colors in her photographs taken over the Gran region in Norway. Speaking about the event, Šapailaitė exclaimed, “Clouds were visible throughout the day, but the colors exploded just before sunset.” The rainbow appearance of PSC, along with their flickering iridescence, left observers in awe.
These rare atmospheric phenomena are the result of specific conditions in the stratosphere. PSC clouds form when water vapor enters the stratosphere and the temperature is cold enough to cause condensation. During winter, the polar night phenomenon leads to a significant drop in temperature at high latitudes due to minimal solar radiation. It is under these circumstances that PSC clouds can develop and act as a barrier to atmospheric cooling.
NASA reports an increasing frequency of PSC cloud occurrences in the Arctic. There are two types of PSC clouds, and the latest observations correspond to the second type. These clouds consist of pure ice, which leads to more intense and stunning colors. The first type, which includes both ice crystals and nitric acid, produces less spectacular displays.
While the recent observations of these rainbow clouds are a spectacle for viewers, researchers continue to monitor and study these phenomena to better understand atmospheric dynamics. The beauty and rarity of this phenomenon serve as a reminder of the wonders of nature and the enduring mysteries held within our atmosphere.
Source: example.com
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