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    초록·키워드

    Joint monitoring of yellow sand (YS) phenomena occurred from 1997 to 2000 was carried out. It was found that the YS in source regions occurred in any time during the year, while the severe dust storms occurred frequently from March to May after the spring thaw. Wind erosion occurred usually with wind greater than about 8 ms⁻¹ in the source region in any seasons. However, severe YS phenomenon found to occur with wind greater than 15 m s⁻¹ at least for 3 hours or more. In source regions, YS occurred over 60~120 days per year. In Korea, YS was found to occur 8~12 cases per year with 12-22 YS days. It was recorded that maximum concentrations of TSP were 989~1396 μg m⁻³ with PM10 values of 861~996 μg m⁻³ and with the lowest visibility of 1.4~1.6 km. In Mongolia, however, it was observed that the number of dusty days decreased due to the increase in rainy days.

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      UCI(KEPA) : I410-ECN-0101-2009-453-016357959