What is Clear?
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility. Clear sky. In meteorology, this term is also used when the cloud cover is less than 1/8 during the day or at the observation hour.
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A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.
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The narrow region between 35-40 ° N and S latitudes in the Northern and Southern Hemispheres, lying between the tropical...
The belt between 50-70 ° N and S latitudes in the Northern and Southern Hemispheres, adjacent to the Polar Region. Although...