permafrost

2026년 8월 21일

• aufeis
• overflow-ice
• groundwater
• permafrost
• river-ice
• hydrostatic-pressure
• seasonal-landform
• arctic

2026년 8월 21일

• ice-wedge
• polygonal-ground
• permafrost
• thermal-contraction
• meltwater
• patterned-ground
• arctic
• geomorphology

2026년 8월 21일

• pingo
• permafrost
• ground-ice
• frost-heave
• thermokarst
• drained-lake
• arctic-landform
• phase-change