Although the research station is far from major sources of human pollution, atmospheric circulation brings air from Europe and North America into the Arctic region.
虽然这个研究站远离人类主要的污染源，但是大气环流会把欧洲和北美的空气带到北极地区。
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Instead, Wickwar's explanation is that a vertical atmospheric wave discovered in their LIDAR data lowered the temperature in the region above their radar installation near Logan, Utah.
The pink to white region above the clouds appears to be the stratosphere; this atmospheric layer generally has little or no clouds and extends up to approximately 50 km above the Earth’s surface.