This study was conducted in the aspects, such as, dry climatic background, circulation conditions, possible sand-dust sources, paths of sand transportation, and synoptic systems.
作者从干旱气候背景、环流状况、沙尘源、沙尘路径及天气系统等方面进行了分析，并集中对引发强沙尘暴的蒙古气旋进行了诊断分析。
The distance and the direction of sand-dust transport depend on the atmospheric circulation.
沙尘的传输距离和方向与大气环流的变化情况直接相关。
However, rising height of capillary water in the sand is seldom affected by freezing - melting circulation.
而砂土的毛细水上升高度不受冻融作用的影响。
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