Mongolia bids to keep city cool with 'ice shield' experiment

Aa trial

winter temperatures geoengineering aims to 'shop' in a giant block of ice to cool the water and Ulaanbaatar in summer

Mongolia is to launch one of the largest glaciers in the world by experimenting later this month in an attempt to fight against the harmful effects of global warming and the effect of urban heat island .

geoengineering

The trial, which is funded by the Government of Ulaanbaatar, is to "store" the freezing temperatures of winter in a huge block of ice and water will help cool the city, as it melts slowly during the summer.

The scientists who conducted the

1 billion Tugrik (£ 460,000) for the project hope that the process will reduce the energy demand of air conditioners and drinking water supplies and regular irrigation . If successful, the model could be applied to other cities in the Far North.

• The project aims to create artificial "naleds" - Ultra thick layers of ice that occur naturally in most northern climates where rivers or springs that push through cracks in the surface of s infiltrate in the outside during the day, then add an extra layer of ice during the night. Unlike the formation of ice on the lakes of the ordinary - it just gets to a meter thick before the isolation of the water below - naleds continue to develop as long as there is enough pressure water to penetrate the surface. Many of them are over seven feet thick, which means that much later than normal melt ice.
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Mongolia engineering firm and EMI will try to recreate this process by drilling holes in the ice began to form in the Tuul River. The water is discharged across the surface where it freezes. This process - in fact the addition of layers of ice rinks - will be repeated at regular intervals throughout the winter

The qualities of naleds (also known as aufeis, German for "ice on top") have been known for hundreds of years. The North Korean army used to construct the crossing of the River reservoirs during the winter and Russia was used as drilling platforms. But engineers generally regarded in negative terms, as a threat to the railways and bridges.

The Anglo-Mongolia believe that the proposed use in Ulaanbaatar could set a positive example that allows northern cities around the world to save on air conditioning costs in summer, a steady supply of alcohol use, and create microclimates costs.

"Everyone is panicking about melting glaciers and ice caps, but no one has yet found a cheap alternative, environment," said Robin Grayson a geologist Mongolia-based. "If you know how to handle, shields naled ice permafrost can repair and construction of parks in cold cities." He said that the process works in cities where the summer is extremely hot and winters with at least a couple of months with temperatures of-20C to 5C.

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