Abstract Wind is a dynamic force in deserts and is responsible for wind erosion when its speed exceeds a given threshold velocity (ut). This study classified these wind speeds (≥ ut) at intervals of 1 m/s and aimed to determine the characteristics of wind erosion events (horizontal dust flux and duration of the wind erosion event) at different wind speed levels (WSLs) based on continuously measured meteorological data recorded from 2009 to 2018 at 12 meteorological stations. In addition, their relationships with the WSL were analyzed in the Tarim Basin. The results indicated that 82.57% of the total wind erosion events occurred at WSL 1 and 2 (ut to ut + 2 m/s). As the WSL increased, the duration of wind erosion events decreased rapidly. More than 50% of the total horizontal dust flux presented at WSL 2 and 3 (ut + 1 m/s to ut + 3 m/s), and all stations showed a maximum value at WSL 2 except RQ, which was at WSL 3. We also found that at WSL 1, the contribution of duration to the total amount was much greater than that of the horizontal dust flux, and it was basically consistent at WSL 2. With the increase in WSL, the contribution of duration to the total amount became gradually smaller than that of the horizontal dust flux. Furthermore, according to the spatial distribution, the high incidence of wind erosion events occurred in the southeast and central of TB at each WSL. Moreover, the regression model that best described the relationship between the WSL and the characteristics of wind erosion events was an exponential function (T = A × e-BVL and F = C × e-DVL, respectively). The results obtained from this study could provide a new insight for the evaluation of wind erosion in arid and semi-arid areas.

中文翻译：

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塔里木盆地不同风速级风蚀事件

摘要 风是沙漠中的一种动力，当其速度超过给定的阈值速度 (ut) 时，就会引起风蚀。本研究以 1 m/s 的间隔对这些风速 (≥ ut) 进行分类，旨在确定不同风速水平 (WSL) 下的风蚀事件特征（水平沙尘通量和风蚀事件持续时间）。 2009 年至 2018 年在 12 个气象站记录的实测气象数据。此外，在塔里木盆地分析了它们与 WSL 的关系。结果表明，总风蚀事件的 82.57% 发生在 WSL 1 和 2（ut 到 ut + 2 m/s）。随着 WSL 的增加，风蚀事件的持续时间迅速减少。在 WSL 2 和 3（ut + 1 m/s 到 ut + 3 m/s）出现的总水平尘埃通量的 50% 以上，除RQ为WSL 3外，所有站点均在WSL 2处出现最大值。我们还发现，在WSL 1处，持续时间对总量的贡献远大于水平沙尘通量的贡献，基本上是WSL 2 一致。随着WSL 的增加，持续时间对总量的贡献逐渐小于水平尘埃通量的贡献。此外，根据空间分布，风蚀事件的高发发生在每个 WSL 的 TB 东南部和中部。此外，最能描述 WSL 与风蚀事件特征之间关系的回归模型是指数函数（分别为 T = A × e-BVL 和 F = C × e-DVL）。