National Geographic: “Ice Shield” Experiment Aims to Cool Mongolian City

Mongolia hopes to beat global warming by growing an “ice shield” that would cool its capital city, Ulaanbaatar. The shield would be an enhanced version of thick ice sheets that naturally form over rivers during winter. These sheets, which can grow up to 23 feet (7 meters) thick, are known in Mongolia and Russia as naleds, and in Alaska and Scandinavia as aufeis—German for “ice on top.” The ice sheets form under certain conditions—very cold temperatures and fast-flowing rivers—when water under the existing ice cover bursts through the cracks and freezes at the surface. To read the full article, click here“Ice Shield” Experiment Aims to Cool Mongolian City

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