2021-12-06

The 1000 meter high active advection volcano staged a “volcanic track” that is difficult to distinguish between true and false

By yqqlm yqqlm

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47ae84b25b27896 - The 1000 meter high active advection volcano staged a "volcanic track" that is difficult to distinguish between true and false

as mentioned above, some of the most common “performances” are wave clouds – triangular, banded clouds formed by the destruction of airflow around volcanoes. However, in this picture taken by the operational land imager (OLI) on Landsat 8 on November 7, 2021, the more striking feature is the bright white air flow visible downwind of the island

this feature may be a cloud called volcanic trajectory. These “tracks” occur when passing clouds interact with gases and particles from volcanoes. Additional particles from the volcano produce more and smaller cloud droplets, which makes the clouds look brighter. NASA atmospheric scientist gass ó said: “when the cloud moves over the volcano, the marks of those smaller cloud droplets will remain in the cloud. When viewed from above, they are similar to a flow or a track of different textures.” he found this feature and often looked for this volcanic track in satellite images

in natural color images, volcanic tracks may be difficult to distinguish. This image is a false color combination of short wave infrared and blue light (OLI band 7-6-2) to help distinguish the orbit from the rest of the cloud. Eye catching lens clouds are also noted, which have nothing to do with volcanic activity. These clouds can be formed at the crest of atmospheric waves. These clouds will be formed when the wind encounters topographic obstacles and is forced to rise

volcanic trajectories are a useful tool for scientists trying to detect less intense volcanic activity. This activity — the simple “whistling” sound of water vapor, particles and gases — is common, but it is often not detected in time, because these emissions usually stay below (or inside) clouds. By studying the clouds around these volcanic vents, scientists have been deeply understanding how clouds form and evolve

it is also possible that the plume from Mt. Michael rose above the clouds on November 7, which means that the feature will be a typical volcanic plume rather than a volcanic track. “There are so many details in the Landsat Image. I can see several shadows, indicating that the volcanic track I’m talking about is actually a plume close to the cloud, low enough to cast a small shadow,” gass ó said. “But at the same time, it is unusual to have such an organized plume above the clouds without being easier to dissipate or thin.”

without lidar data to measure the height of the feature, it is impossible to know whether the feature is a volcanic orbit or a plume. Anyway, gass ó points out. “It looks beautiful, doesn’t it? Similarly, it arouses people’s curiosity and wants to find more things.”