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首页> 外文期刊>Science of the total environment >An investigation into climatic and terrestrial drivers of dust storms in the Sistan region of Iran in the early twenty-first century
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An investigation into climatic and terrestrial drivers of dust storms in the Sistan region of Iran in the early twenty-first century

机译：二十一世纪初期伊朗中山地区气候和陆地司机的调查

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Dust storms cause a wide range of impacts on environment, economy and human health in the Sistan region of southeastern Iran. This paper investigates long-term variability of dust activity over 23 years (1997-2019) using the Dust Storm Index (DSI) and the frequency of dust-storm days (DSD, visibility ＜1000 m) and assesses the associated importance of various terrestrial and climatic drivers. A dust storm corridor was identified, based on the prevailing wind direction at Zabol, including parts of the Hamoun lakes and surrounding desert in order to study the effects of vegetation cover and lake water levels on dust activity. The results show maximum intensity of dust storms occurred at 10:30 a.m. and in the summer, consistent with the highest wind speeds - associated with the regionally important Levar wind - and highest air temperatures and lowest precipitation and relative humidity. Strong positive correlations were demonstrated between DSI and wind speed, particularly in summer. The 2000-2004 period saw severe dust-raising activity with a DSI of 530.6. Mean wind speeds were greater and precipitation, humidity, vegetation and water coverage were lower during this severe dust-activity period than in other periods. Comparing 2000-2004 with 1997-1999, DSI was five times higher and DSD eight times higher. The dust storms with the longest duration occurred in July 2001 and June 2008 (114 h and 78 h respectively). The July 2001 event, in which wind speed peaked at 25 m/s and visibility dropped to 100 m on several occasions, may be the longest continuous dust storm on record. The key role of water and vegetation cover in the Hamouns was highlighted, indicating the importance of protecting the Hamoun ecosystems and sustainably managing their water resources in efforts to mitigate dust storm hazards in the Sistan region.
机译：沙尘暴导致对伊朗东南部地区的环境，经济和人类健康产生广泛的影响。本文研究了使用沙尘暴指数（DSI）和粉尘日（DSD，可见性<1000米）的粉尘活动超过23年（1997-2019）的长期变化（1997-2019），并评估了各种陆地的相关重要性和气候司机。根据Zabol的普遍风向，包括Hamoun湖泊和周围沙漠的一部分，确定了一艘沙尘暴走廊，以研究植被覆盖和湖水水平对粉尘活动的影响。结果表明，夏季发生的最大尘暴强度发生在10:30，与最高风速 - 与区域重要的左风和最高的空气温度和最低沉淀和相对湿度相关。 DSI和风速之间的表现出强烈的正相关性，特别是在夏季。 2000 - 2004年的时间为530.6的DSI看到严重的粉尘饲养活动。在这种严重的粉尘活动期间，平均风速较大，沉淀，湿度，植被和水覆盖率低于其他时期。比较2000-2004与1997-1999，DSI高五倍，DSD八倍高。持续时间最长的尘暴发生在2001年7月和2008年6月（分别为64小时和78小时）。 2001年7月的事件，其中风速以25米/秒达到达到峰值，并且在几次下降到100米，可能是记录最长的连续尘暴。突出了水和植被覆盖在哈蒙斯中的关键作用，表明保护哈蒙生态系统和可持续管理其水资源的重要性，以减轻西斯坦地区的沙尘暴危险。

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