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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Parameterization of dust emission for the simulation of the yellow sand (Asian dust) event observed in March 2002 in Korea - art. no. 4618
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Parameterization of dust emission for the simulation of the yellow sand (Asian dust) event observed in March 2002 in Korea - art. no. 4618

机译：用于模拟2002年3月在韩国观测到的黄沙（亚洲粉尘）事件的粉尘排放的参数化-艺术。没有。 4618

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1] An extraordinarily severe yellow sand event was observed in Korea for the period of 21-23 March 2002. This event has been simulated using the three-dimensional eulerian transport model with meteorological outputs of the Regional Data Assimilation and Prediction System (RDAPS) together with the statistically derived dust emission conditions from WMO 3 hourly synoptic reporting data for seven spring seasons (March-May) from 1996 to 2002 in East Asia. The statistically derived dust-rise conditions with the help of the Chinese soil map in the source regions are found to be the threshold wind speed of 9.5, 7.5, 6.0 and 9.2 m s(-1) and the upper limit of relative humidity of 60, 35, 30% and 40% in the Gobi, Sand, Loess and Mixed soil regions, respectively. These dust-rise conditions are implemented to the eulerian long-range transport model to simulate the extraordinarily intensive yellow sand event observed in Korea in terms of temporal and spatial variations of dust concentrations, starting and ending times of the yellow sand event over the Korean peninsula. It is found that the model simulates quite well the observed concentrations of more than 1,000 mug m(-3) within the same order of magnitude and the starting and ending times of yellow sand in Korea within an hour. The spatial distribution of vertically integrated dust concentration in the model is quite well coincided with that of aerosol index obtained by total ozone mapping spectrometer (TOMS). The simulated dust particle sizes indicate that most of mass concentrations of dust in the source regions are mainly contributed by dust particles larger than PM10 whereas those at distant regions from the sources are largely attributed to the PM10 particles, suggesting the usefulness of the particle size spectrum in identifying the origin of a dust storm. The presently derived emission conditions enable to forecast the yellow sand event in Korea more reasonably than previously used conditions of threshold friction velocities. [References: 31
机译：1] 2002年3月21日至23日，韩国发生了一次非常严重的黄沙事件。该事件是使用三维欧拉运输模型和区域数据同化和预测系统（RDAPS）的气象输出共同模拟的从WMO 3小时的天气摘要报告数据统计得出的东亚从1996年至2002年的7个春季季节（3月至5月）。借助中国土壤图在源区统计得出的扬尘条件为阈值风速9.5、7.5、6.0和9.2 ms（-1），相对湿度上限为60，戈壁，沙地，黄土和混合土地区分别为35％，30％和40％。将这些扬尘条件应用到欧拉远程运输模型中，以模拟在朝鲜半岛观察到的异常密集的黄沙事件，包括沙尘浓度的时空变化，朝鲜半岛黄沙事件的开始和结束时间。结果发现，该模型很好地模拟了在相同的数量级内观察到的超过1000杯子m（-3）的浓度，以及韩国在一小时内黄砂的开始和结束时间。该模型中垂直积分粉尘浓度的空间分布与通过总臭氧图谱仪（TOMS）获得的气溶胶指数非常吻合。模拟的尘埃粒径表明，源区尘埃的大部分质量浓度主要是由大于PM10的尘埃颗粒贡献的，而与尘埃相距较远区域的尘埃颗粒主要归因于PM10颗粒，这表明粒径谱的有用性确定沙尘暴的起源。与以前使用的阈值摩擦速度条件相比，目前得出的排放条件能够更合理地预测韩国的黄沙事件。 [参考：31

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