Tag Archives: permafrost

Arctic rivers face major changes due to a warming climate, permafrost melting, and an accelerating water cycle; impacts will have global consequences

As the Arctic warms, its major rivers are changing in ways that could have major consequences not only for the Arctic region but for the world as well. Rivers represent the land arm of the earth’s hydrological cycle. As rain and snow fall, rivers carry freshwater runoff as well as dissolved organic and particulate materials,… Read More »

Ancient soil emerging from beneath a mile of ice offers warnings of the future

About 400,000 years ago, most of Greenland was ice-free. The scrubby tundra in the mountainous regions of the island’s northwest is basking in the Sun’s rays. Evidence suggests that an insect-filled spruce forest covers the southern part of Greenland. Global sea level was much higher at the time; It was between 20 and 40 feet… Read More »