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首页> 外文期刊>Atmospheric environment >Contribution of the Middle Eastern dust source areas to PM_(10) levels in urban receptors: Case study of Tehran, Iran
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Contribution of the Middle Eastern dust source areas to PM_(10) levels in urban receptors: Case study of Tehran, Iran

机译：中东尘埃源地区对城市受体PM_（10）含量的贡献：伊朗德黑兰的案例研究

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摘要

The origins and evolution of the Middle Eastern dust storms which frequently impact the residents of this arid region were studied. A methodology was adapted and developed to identify the desert regions of potential dust sources and determine their contributions to PM_(10) concentrations in the highly-populated receptor city of Tehran, Iran. Initially, the episodes of regional dust intrusion and the resulting amounts of increase in the particulate concentrations during these episodes were determined using a statistical analyzing methodology. The dust episodes were also inspected with the aerosol index information from the Ozone Monitoring Instrument (OMI). The Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model was used as the main tool to determine the proportions of dust originating from different deserts during the dusty episodes of 2009-2010. Daily 5-day back trajectories were obtained from the receptor stations during the dust outbreaks in order to find and confirm the location of potential sources. After the boundaries of the potential sources were determined by 5-day backward trajectories, this region was divided into different areas to quantify their contributions to the measured PM_(10) levels. The proximity between the measured and simulated data confirmed the ability of HYSPLIT in modeling the Middle Eastern dust intrusion and estimating the particulate concentration in the downwind receptor sites. Results showed that the deserts in Iraq and Syria are the main contributing dust sources which comprise more than 90% of the dust related PM_(10) concentrations in Tehran, during the studied dust episodes. The sources in northern Iraq and eastern Syria respectively represented 44% and 32% contributions on average.
机译：研究了经常影响该干旱地区居民的中东沙尘暴的起源和演变。修改并开发了一种方法，以识别潜在尘埃来源的沙漠地区，并确定它们对伊朗德黑兰人口密集的接收城市PM_（10）浓度的贡献。最初，使用统计分析方法确定了区域性粉尘入侵事件以及这些事件期间颗粒物浓度增加的结果。还使用来自臭氧监测仪器（OMI）的气溶胶指数信息检查了灰尘事件。混合单粒子拉格朗日综合轨迹（HYSPLIT）模型被用作确定2009-2010年尘土飞扬期间来自不同沙漠的尘埃比例的主要工具。在粉尘暴发期间，每天从受体站获得5天的后退轨迹，以发现并确认潜在源头的位置。在通过5天后退轨迹确定潜在来源的边界后，将该区域划分为不同区域，以量化其对测得的PM_（10）水平的贡献。实测数据和模拟数据之间的接近性证实了HYSPLIT具有建模中东尘埃入侵和估算顺风接收点中颗粒物浓度的能力。结果表明，在研究的沙尘天气中，伊拉克和叙利亚的沙漠是主要的尘埃来源，占德黑兰90％以上的尘埃相关PM_（10）浓度。伊拉克北部和叙利亚东部的消息来源平均分别贡献了44％和32％。

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