Dust transport is a cross-boundary phenomenon that affects the environment and impact climate variables. The direct impact of dust transport is the increase in particulate matter concentration alongside its trajectory. The regional climate model, namely RegCM, can be used to predict the dust burden. Either Zakey’s or Kok’s dust schemes are activated in the chemistry module for the dust transport calculations. In this study, we used each dust scheme to simulate the dust transport event from the Saharan Desert that occurred on February 1, 2015. Our principal aim is to compare transported dust sizes with previously acquired cascade impactor results and evaluate the pros and cons of each scheme. The highest dust concentrations at the sampling location were 332.3 μg/m³ and 170.8 μg/m³ for Zakey’s dust scheme and Kok’s dust scheme, respectively. Zakey’s dust scheme predicted closer results to the measured value. This was due to the overestimation in the finest size bin, which is between 0.01 and 1.0 μm. For the remaining sizes, both schemes produced similar results. However, the overestimation in Zakey’s scheme deviated the size distribution to finer size, which is not in line with the measured results. The mass median diameter of the transported dust was 1.57 μm and 0.45 μm according to Kok’s and Zakey’s dust schemes, respectively. The measured mass median diameter of dust was 2.6 μm. Although Kok’s scheme predicted the dust size better, both schemes could not simulate coarse size dust transport.

粉尘运输是一种影响环境和影响气候变量的跨界现象。粉尘运输的直接影响是沿其轨迹的颗粒物浓度增加。区域气候模型，即RegCM，可用于预测沙尘负荷。Zakey's 或 Kok's 粉尘方案在化学模块中激活以进行粉尘传输计算。在本研究中，我们使用每个沙尘方案来模拟 2015 年 2 月 1 日发生在撒哈拉沙漠的沙尘传输事件。我们的主要目的是将传输的沙尘大小与先前获得的级联撞击器结果进行比较，并评估每种方案的优缺点方案。采样点的最高粉尘浓度分别为 332.3 μg/m ³和 170.8 μg/m ³分别为 Zakey 的灰尘方案和 Kok 的灰尘方案。Zakey 的尘埃计划预测的结果更接近测量值。这是由于在 0.01 到 1.0 μm 之间的最细尺寸 bin 中被高估了。对于剩余的尺寸，两种方案产生了相似的结果。然而，Zakey方案中的高估使粒度分布偏向更细的粒度，与实测结果不符。根据 Kok's 和 Zakey's 粉尘方案，输送的粉尘的质量中值直径分别为 1.57 μm 和 0.45 μm。测得的粉尘质量中值直径为 2.6 μm。尽管 Kok 的方案更好地预测了粉尘尺寸，但两种方案都无法模拟粗粒径的粉尘输送。