noun
the portions of the Earth's surface where water is in solid form, including sea ice, snow cover, glaciers, ice caps, ice sheets, and frozen ground
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The cryosphere is the frozen water part of the Earth's system, including snow, ice caps, glaciers, and permafrost.
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The cryosphere refers to all the frozen stuff on Earth, like ice and snow.
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When the cryosphere starts melting, that's when things get real messy.
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Her heart was as cold and frozen as the cryosphere, unwilling to thaw for anyone.