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10 cards from this deck
Polar, alpine, periglacial (tundra), glacial
Ground below 0°C for at least 2 consecutive years
Melted ice exposes dark surfaces; absorb heat; more melting
Can exceed 200 km/hr
Below 150 mm per year
50 to 60 days
80-90% of incoming radiation reflected
About 10% (15 million km²)
About one-third of Earth's surface
Treeless plain
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