Abstract: Parameterization of dust emission flux is an important factor to accurately simulate and predict dust events. The data measured by field experiments can be used directly to evaluate the parameterization schemes. On the basis of explaining the physical mechanism, parameterization schemes and data inputs of various dust emission models, the authors investigate their similarities and differences. The field measurements of dust emission flux are critically needed for the validation, calibration and improvement of dust emission models. The gradient method and dust particle concentration measurements are two common methods to measure the dust emission flux during field experiments. The existing problems and future research directions are discussed by comparing the model parameterization schemes and results of field measurements.

Key words: streamwise sand flux, vertical emission flux, parameterization, gradient method

摘要： 沙尘释放通量的参数化是准确模拟和预报沙尘天气的重要因素, 而外场观测为参数化方案提供直接的实验验证。在对不同沙尘释放模式的物理机制、参数化方案和输入数据需求进行阐述的基础上, 讨论了不同模式的异同。沙尘释放模式的验证、校准和改进需要外场沙尘通量的实测结果, 梯度法和粒子数浓度测量是外场观测沙尘释放通量的两种常用方法。通过对模式参数化方案和外场观测结果的对比分析, 指出目前存在的问题以及今后可能进一步的研究方向。

关键词: 沙尘水平跃移通量, 垂直释放通量, 参数化, 梯度法