将地面卫星观测与HYSPLIT反向轨迹建模相联系以确定影响伊朗西部的尘源:以Lorestan省为例研究

IF 1.3 Q4 ENVIRONMENTAL SCIENCES
Elham Borna, M. Kiani Sadr, S. Hosseini
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引用次数: 1

摘要

背景:本研究将地面和卫星观测与HYSPLIT模型的结果相结合,以确定影响伊朗西部的沙尘暴(SDS)的起源、传输和沉积。方法:获得2000-2014年期间的现场测量粉尘暴露数据,分析年、月和日尺度上的粉尘浓度和粉尘强度的变化。本研究中的遥感测量包括对总共八块(1B级校准辐射1公里(MOD021KM))MODIS瓦片的分析,这些瓦片是根据解释地面观测结果选择的,以捕捉2000年至2014年间发生的主要SDS事件。结果:这些结果表明,自2008年以来,沙尘天数急剧增加,并被用作使用8张MODIS图像确定中东中部和研究省SDS的空间覆盖率和强度的基础。根据混合单粒子拉格朗日综合轨迹模型(HYSPLIT)的后向轨迹分析,发现MODIS导出的SDS既有国内来源,也有国际来源。最普遍和最强大的来源可能是来自地中海的气团从叙利亚和伊拉克的沙漠开始,并在扎格罗斯山脉链阻挡东风的伊朗西部终止。结论:尽管区域SDS的时间与现场观测之间存在明显联系,但也应调查该省西部当地尘源的贡献,以深入了解影响伊朗西部,特别是洛雷斯坦省的SDS事件的发展和传播。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Linking ground-satellite observations with HYSPLIT Back trajectory modeling to identify dust sources affecting Western Iran: A case study in Lorestan province
Background: This study combined ground and satellite observations with the results of HYSPLIT model to identify the origin, transport, and deposition of sand and dust storms (SDSs) affecting Western Iran. Methods: Field-measured dust exposure data were obtained during 2000-2014 to analyze variability of dust concentration and dust intensity at annual, monthly, and daily scales. Remote sensing measurements in this research include the analysis of a total of eight (Level 1B Calibrated Radiances 1 km (MOD021KM)) MODIS tiles selected based on interpreting the results of ground observations to capture the major SDS events occurred between 2000 and 2014. Results: The results, indicating a sharp rise in the number of dusty days from 2008 onwards, were used as a basis to identify the spatial coverage and intensity of SDSs over the central part of the Middle East and the study province using a number of eight MODIS images. According to the back trajectory analysis of Hybrid Single-Particle Lagrangian Integrated Trajectory Model (HYSPLIT), the MODIS-derived SDSs were found to have both national and international sources. The most prevalent and powerful source was likely to initiate from deserts of Syria and Iraq by air masses coming from the Mediterranean Sea and terminate in Western Iran where the Zagros Mountains Chain blocks easterly winds. Conclusion: Despite the evident link between timing of regional SDSs and in situ observations, the contribution of local dust sources in the west of the province should be also investigated to provide insights into the development and spread of SDS events affecting Western Iran, especially Lorestan Province.
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来源期刊
CiteScore
2.40
自引率
37.50%
发文量
17
审稿时长
12 weeks
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