alaskan permafrost under assault from warming climate

Alaska permafrost cliff 1500 crop

THE TERM “PERMAFROST” refers to ground that re­mains frozen for at least two straight years. Per­mafrost is most common in re­gions with high moun­tains and in higher lat­i­tudes; it covers large re­gions of the Earth. Al­though the ground is frozen, per­mafrost re­gions are not al­ways cov­ered in snow. Per­mafrost is made of a com­bi­na­tion of soil, rocks, and sand that are held to­gether by ice. READ MORE