【摘要】 沙尘暴是一种强烈的风蚀过程,同时又加剧了荒漠化进程。沙尘气溶胶的生态环境及气候效应已成为国际社会关注的焦点问题。采用"IMGRASS"春季野外实验期间在内蒙古浑善达克沙地东南部的桑根达来观测点得到的沙尘气溶胶的粒谱,计算了该沙地10m高度的沙粒启动速度,并估算了该沙地沙尘气溶胶的传输距离。更多还原

【Abstract】 Sand-dust storm is an intense wind erosion process and it simultaneously exacerbates the land desertification process.The ecological environmental effect and climatic effect of dust aerosol in sand-dust storm have become the focus of attention of the international community of science.In this paper,the dust aerosol number concentration and its transmission characters during spring sand-dust storms were analyzed based on the observation data in Hunshandake sand-land.It was calculated that the dust-emitting wind speed on the sand-land is 5.9 m\5s-1 at 10 m high,and the transmission distance of dust particles in sand-dust storm weather condition is about 7.6 104~7.6×105 km.更多还原