polar stratospheric cloud
(meteorology) A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation
plural of wagonful
plural of integration
plural of rockpool
厳しい冬の間、科学者たちは北極上空の成層圏に発生した鮮やかな極域成層圏雲を撮影した。
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