Intermittent Aeolian Saltation: A Protocol For Quantification
Intermittent Aeolian Saltation: A Protocol For Quantification
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DOI：
10.1111/gere.12249
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发表时间：
2018-04
影响因子：
2
通讯作者：
D. Sherman;Bailiang Li;J. Ellis;C. Swann
中科院分区：
文献类型：
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作者：
D. Sherman;Bailiang Li;J. Ellis;C. Swann
摘要 跃移间歇性（沙子输送发生的时间比例）的量化提供了有关风成系统性质的宝贵信息，包括有关沙子输送阈值条件的见解。许多研究都测量了间歇性，但缺乏测量标准化往往导致结果比较困难。四个方法因素影响间歇性的估计：采样频率、采样持续时间、采样面积和传感器高度。对于给定的传输速率，间歇性值可能会随着传感器高度、采样频率增加或传感器面积减小而减小；它可能会因采样持续时间而增加或减少。因此，我们模拟了这些因素的影响，并提出了一种用于测量和报告间歇性的通用协议，该协议基于在距离表面 50 毫米高程处使用 100 平方毫米传感器面积进行的 1 Hz 测量或等效值。
Abstract The quantification of saltation intermittency—the proportion of time when sand transport occurs—provides valuable information about the nature of aeolian systems, including insights concerning threshold conditions for sand transport. Intermittency has been measured in numerous studies, but a lack of measurement standardization often makes the comparison of results difficult. Four methodological factors influence estimates of intermittency: sample frequency, sample duration, sample area, and sensor elevation. For a given transport rate, the value of intermittency may decrease with sensor elevation, increased sample frequency, or decreased sensor area; it may increase or decrease as a consequence of sample duration. We therefore simulate the influences of these factors and suggest a common protocol for measuring and reporting intermittency based on measurements at 1 Hz with 100 mm2 sensor area at 50 mm elevation above the surface, or equivalent values.