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The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible.
Stratocumulus cloud consists of large, rounded masses of stratus that form groups, lines or waves.
The thin, layered Cirrostratus cloud is composed of ice crystals and forms a veil that covers all or part of the sky.
Impacts on defence and global security
Please note that when changing units, only forecasts and maps will be affected.