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Asian dust depositions over the Asian region during March 2010 estimated by ADAM2

机译：ADAM2估计2010年3月亚洲地区的亚洲尘埃沉积

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摘要

Abstract The Asian Dust Aerosol Model 2 with the MM5 meteorological model has been employed to estimate the dust emission, dust concentration, and wet and dry deposition of dust in the Asian region for the month of March in 2010. It is found that the model simulates quite reasonably the dust (PM_10) concentrations both in the dust source region and the downstream region of Korea. The starting and ending times of most dust events and their peak concentration occurrence times are well simulated. The monthly mean maximum surface dust concentration (PM_10) is found to be 267 μg m~-3 in the domain of central northern China (CNC). Monthly total maximum dust emission of more than 32 t km~-2 and that of deposition of more than 25.4 t km~-2 (dry deposition of 24 t km~-2 and wet deposition of 1.4 t km~-2) are found to occur in the domain CNC, whereas the monthly mean minimum surface dust concentration (PM_10) is found to be 0.2 μg m~-3 in the domain of the Tibetan Plateau, where the monthly total dust emission (4 kg km~-2) and the monthly total dust deposition (9 kg km~-2) are found to be minimum. This monthly total dust deposition of 9 kg km"2 (dry deposition of 7 kg km~-2 and wet deposition of 2 kg km~-2) is as large as 2.25 times of that of emission (4 kg km~-2), suggesting net dust influx toward the Tibetan Plateau from the surrounding dust source regions. It is also found that the ratio of the total dust deposition to the total dust emission in the source region increases toward the downstream direction from 0.4 in the upstream source region of Taklimakan to 0.80 in the downstream source region of northeastern China. More than 90% of the total dust deposition is found to be contributed by dry deposition due to the lack of precipitation in the dust source region. The monthly mean dust concentration (PM_10) is found to decrease with distance away from the dust source region. The monthly mean dust concentration of 62 μg m~-3 over the Yellow Sea (YES) decreases to 4.3 μg m~-3 over the Northwestern Pacific Ocean (NWP). The monthly total dust deposition in the downstream region is also found to decrease away from the source region from 2.33 t km~-2 (dry deposition of 1.36 t km~-2 and wet deposition of 0.97 t km~-2) over the domain YES to 1.45 t km~-2 (dry deposition of 0.16 t km~-2 and wet deposition of 1.30 t km~-2) over the domain NWP. A large amount of the total dust deposition over the seas is contributed by wet deposition (more than 90%), causing a small decreasing rate of the total dust deposition with distance from the source region. The estimated dust deposition could adversely impact the eco-environmental system significantly in the downstream regions of the Asian dust source region, especially over the seas.
机译：摘要利用具有MM5气象学模型的亚洲粉尘气溶胶模型2，对2010年3月亚洲地区的粉尘排放，粉尘浓度以及干湿粉尘沉积进行了估算。在韩国的粉尘源区域和下游区域，粉尘（PM_10）的浓度都相当合理。很好地模拟了大多数粉尘事件的开始和结束时间及其峰值浓度发生时间。在华北中部地区（CNC），月平均最大表面尘埃浓度（PM_10）为267μgm〜-3。发现每月总的最大粉尘排放量超过32 t km〜-2，沉积物的总排放量超过25.4 t km〜-2（干沉降为24 t km〜-2，湿沉降为1.4 t km〜-2）。发生在CNC区域，而在青藏高原地区，月平均最低表面粉尘浓度（PM_10）被发现为0.2μgm〜-3，那里的每月总粉尘排放量（4 kg km〜-2）每月的总尘埃沉积量（9 kg km〜-2）最小。每月的总尘埃沉积量为9 kg km“ 2（干沉降为7 kg km〜-2，湿沉降为2 kg km〜-2），是排放量（4 kg km〜-2）的2.25倍。 ，表明净尘埃从周围的尘埃源区流向青藏高原，并且还发现，尘埃源区的总尘埃沉积量与总尘埃排放量之比从上游的尘埃源区的0.4朝下游方向增加。东北下游源区塔克拉玛干达到0.80，由于粉尘源区缺乏降水，干粉沉积占粉尘总量的90％以上，月平均粉尘浓度（PM_10）为在离尘源区越远的地方，尘埃浓度会降低；黄海的月平均尘埃浓度为62μgm〜-3（YES），西北太平洋的月平均尘埃浓度降至4.3μgm〜-3（NWP）。下游区域的总尘埃沉积还发现在YES域上远离源区的距离从2.33 t km〜-2（1.36 t km〜-2的干沉降和0.97 t km〜-2的湿沉降）减小到1.45 t km〜-2（在NWP域上的干沉降为0.16 t km〜-2，湿沉降为1.30 t km〜-2）。湿气沉积（超过90％）是造成海洋上大部分粉尘沉积的主要原因，随着距离源区的距离的增加，粉尘沉积的减少率很小。估计的粉尘沉积可能会对亚洲粉尘源区域的下游地区，特别是海洋上的生态环境产生严重影响。

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  • 来源
    《Theoretical and applied climatology》 |2011年第2期|p.129-142|共14页
  • 作者

    Soon-Ung Park; Anna Choe; Moon-Soo Park;

  • 作者单位

    Seoul National University Research Park, Center for Atmospheric and Environmental Modeling, RM. 515, San 4-2, Bongcheon-dong, Gwanak-gu, Seoul 151-919, South Korea;

    Seoul National University Research Park, Center for Atmospheric and Environmental Modeling, RM. 515, San 4-2, Bongcheon-dong, Gwanak-gu, Seoul 151-919, South Korea;

    Seoul National University Research Park, Center for Atmospheric and Environmental Modeling, RM. 515, San 4-2, Bongcheon-dong, Gwanak-gu, Seoul 151-919, South Korea;

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