美国亚利桑那州中部索诺兰沙漠与北美季风相关的沙尘事件的地形屏蔽和漏斗效应

IF 2.6 3区 环境科学与生态学 Q2 ECOLOGY Journal of Arid Environments Pub Date : 2024-07-30 DOI:10.1016/j.jaridenv.2024.105233
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引用次数: 0

摘要

沙尘暴与中部索诺兰沙漠的大规模事故和死亡有关,特别是在北美季风期间的美国中部吉拉河谷。本研究分析了底层地形对夏季大型沙尘暴及其移动产生影响的三个事件。所有三个例子都显示了与底层地形相关的屏蔽或反向漏斗效应。白坦克山、埃斯特拉山脉、萨卡顿山脉、圣坦山脉和南山群等孤立山脉群之间的漏斗效应会共同造成更高的沙尘浓度。反之,沙尘流进入这些孤立的山地复合体也会导致沙尘的屏蔽或阻挡,使地形特征后面的地区沙尘较少,而屏障的迎风面则沙尘浓度较高。这些沙尘暴/地形研究为确定地形对亚利桑那州中部沙尘暴的影响提供了首次机会。本研究的目的是确定美国西南部亚利桑那州中部索诺兰沙漠影响沙尘暴移动的地形要素。通过使用 IDW 插值法分析 PM10 浓度水平和风速,我们发现独立的山地复合体可以提供显著的沙尘屏蔽和漏斗效应,从而影响该地区沙尘暴的整体轨迹。
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Topographic shielding and funneling for dust events associated with the North American Monsoon in the Sonoran Desert, central Arizona, USA

Dust storms are linked to large scale accidents and fatalities in the Central Sonoran Desert, specifically in the central Gila River Valley of the United States during the North American Monsoon. This study analyzes three events where the underlying topography impacts large summertime dust storms and their movement. All three examples demonstrate the shielding or, conversely, funneling effects associated the underlying terrain. The funneling between isolated mountain complexes, such as White Tank Mountains, the Sierra Estrella, the Sacaton Mountains, the San Tan Mountains, and the South Mountain Complex can combine to create substantially higher dust concentrations. Conversely, dust flow into these isolated mountain complexes can also lead to shielding, or blocking, of the dust such that area behind the topographic features experiences less dust while the windward side of the barriers have accented dust concentrations. These dust storm/topography studies provide a first opportunity to identify topographic influences on central Arizona dust storms.

Significance statement

The purpose of this study is to identify Topographic elements of the central Sonoran Desert located in the Arizona region of the Southwestern United States that impact the movement of dust storms. Using IDW interpolation to analyze PM10 concentration levels and wind speeds, we find that stand-alone mountain complexes can provide significant dust shielding and funneling that effect the overall trajectory of a dust storm in this region.

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来源期刊
Journal of Arid Environments
Journal of Arid Environments 环境科学-环境科学
CiteScore
5.70
自引率
3.70%
发文量
144
审稿时长
55 days
期刊介绍: The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments. As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their past, present and future use.
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