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Chinese sand found in the Alps

09.11.2003

Geographers from the University of Bordeaux (France), analyzing the dust on the snow that fell in the Alps and the Pyrenees, found grains of sand brought by the wind from the Taklamakan desert in northwest China. Moreover, this sandy dust flew in a roundabout way, east of the desert.

Having flown 20 thousand kilometers, it crossed the Pacific Ocean, the North American continent, the Atlantic and was deposited on the snow in the mountains of Europe. The grains of sand were carried by high-altitude winds, the speed of which reaches 200-300 kilometers per hour, the flight took two weeks.

Scientists analyzed a layer of snow that fell in the winter of 1991 and was buried under layers that have been deposited since then. It was possible to determine the origin of sand grains by their mineralogical and isotopic composition. And their path was calculated according to information about global wind flows in the winter of 1991.

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