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ESTIMATION OF DRY DEPOSITION OF DUST IN ASSOCIATION WITH A WINTER-TIME YELLOW SAND EVENT OBSERVED OVER SOUTH KOREA DURING 25 TO 28 JANUARY 1999

机译:1999年1月25日至28日在韩国观察到的冬季黄色沙尘事件中粉尘的干沉降估算

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摘要

Dry deposition of TSP in association with a Yellow Sana event observed over South Korea during 25 to 28 January 1999 has been estimated using the inferential method with the use of measured TSP concentrations at 25 sites and the surface meteorological data observed at 64 stations scattered over South Korea. Before the dust storm moves into the Korean peninsula, the TSP concentration in Korea is less than 100 μg m~(-3) . However, the dust storm boosts the TSP concentration level by a factor of 5 ~ 10 within several hours, with peaks up to 960 μg m~(-3) . During the chosen episodic period, the first dust storm causes the total TSP dry deposition of 49,960 t for a day and the second dust storm produces the TSP dry deposition of 63,190 t for two days in the whole region(117,810 km~2) of South Korea. These values are respectively 5.5 and 3.5 times higher than the mean TSP deposition amount (9,040 t day~(-1) ) during the non Yellow Sand period, suggesting potential impact of Yellow Sand on the eco-environmental system in Korea.
机译:使用推论方法,结合在25个站点测得的TSP浓度和在韩国南部分散的64个站点观测到的地面气象数据,推算了与1999年1月25日至28日在韩国观察到的黄色Sana事件相关的TSP干沉降韩国。在沙尘暴进入朝鲜半岛之前,韩国的TSP浓度小于100μgm〜(-3)。然而,沙尘暴在数小时内将TSP浓度水平提高了5〜10倍,峰值达到960μgm〜(-3)。在选定的时期内,第一次沙尘暴导致TSP干沉降量为每天49,960吨,第二次沙尘暴在南部整个地区(117,810 km〜2)产生TSP干沉降量为两天的63,190 t韩国。这些值分别比非黄沙时期的平均TSP沉积量(9,040 t day〜(-1))高5.5倍和3.5倍,表明黄沙对韩国的生态环境系统有潜在的影响。

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