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  • Typhoon Information
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The first record of the 'Gobi' in Chinese literature is found in the Gudangseo(舊唐書) as Gwabyeok(戈壁). Gobi region covered southeastern Mongol Plateau and inner Mongolia, means 'desert grassland', that is, rough grassland. Wide grassland in Mongolia is classified as forestal stepp(Hangai)e in northern part or desert steppe(Gobi) in southeastern part by natural structure.

Gobi region is estimated inner sea(內海), and old rocky layer(高期岩層) did not affect the diastrophism except for the Great warping(大撓曲). As a result of the Great warping, lower surface was risen and became land. After then, gobi region has been formed as gravel was deposited by weathering and erosion.

G. J. Hyung (The Korean Geographical Society, Vol. 32 No. 2 265∼273pp) According to distribution charts of dust storm days, drifting dust days, and Asian dust days, day number of dust storm in western Mongolia (Altai, Khangai and Khentei Mountain) is less than 5 days while that in southern part (Gobi desert and semi-deserts) is 20~37 days. Drifting dust is the most frequent in Mongol Els.

61% of dust storm in Mongolia occurs in springtime. Dust storm lasts at an average of 3.1~6.0 hours, and 50% occurs at daytime, 20% at nighttime. Dust storm occurs more frequently in urban area, and wind speed at surface is about 6~20 m/s. Dust storm occurs under dry condition of air and soil, about 70% occurred in dry soil condition. Mean relative humidity was 20~40% during dust storm. Day number of Asian dust increases 3 times from 1960 to 1990. (Natsagdor et al., 2002)

Sand storm, Drafting dust, Floating dust