Urban particle size distributions during two contrasting dust events originating from Taklimakan and Gobi Deserts
Urban particle size distributions during two contrasting dust events originating from Taklimakan and Gobi Deserts
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源自塔克拉玛干和戈壁沙漠的两次对比沙尘事件期间的城市颗粒尺寸分布
DOI：
10.1016/j.envpol.2015.08.052
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发表时间：
2015
影响因子：
8.9
通讯作者：
Li Fang
中科院分区：
文献类型：
--
作者：
Zhao Suping;Yu Ye;Xia Dunsheng;Yin Daiying;He Jianjun;Liu Na;Li Fang
利用HYSPLIT轨迹模式以及MODIS和CALIPSO卫星资料识别了这两次沙尘的来源，以了解塔克拉玛干沙漠和戈壁沙尘过程中沙尘的粒度分布。在沙尘过程中，超微粒子显著增加。来自戈壁沙漠的沙尘事件对大于2.5μm的颗粒物影响显著，而来自塔克拉玛干沙漠的沙尘事件对大于1.5~2.5μm的颗粒物影响明显，发现不同沙尘来源的沙尘粒子的粒度分布及其模式参数VMD(体积中值直径)有显著差异。塔克拉玛干沙漠的沙尘比戈壁沙漠的沙尘要细，这可能是由于沙尘与城市排放的混合等其他影响因素造成的。我们的发现说明了结合现场、卫星数据和轨迹模型来描述具有各种气溶胶参数的大尺度尘埃羽流的能力。
The dust origins of the two events were identified using HYSPLIT trajectory model and MODIS and CALIPSO satellite data to understand the particle size distribution during two contrasting dust events originated from Taklimakan and Gobi deserts. The supermicron particles significantly increased during the dust events. The dust event from Gobi desert affected significantly on the particles larger than 2.5 μm, while that from Taklimakan desert impacted obviously on the particles in 1.0–2.5 μm. It is found that the particle size distributions and their modal parameters such as VMD (volume median diameter) have significant difference for varying dust origins. The dust from Taklimakan desert was finer than that from Gobi desert also probably due to other influencing factors such as mixing between dust and urban emissions. Our findings illustrated the capacity of combiningin situ, satellite data and trajectory model to characterize large-scale dust plumes with a variety of aerosol parameters.