一次黄沙天气过程的分析

AN ANALYSIS OF ASANDSTORM WEATHER

中文摘要:

      本文通过天气图、气象要素、气象卫星云图和轨迹的分析,探讨了造成1988年4月9日至16日一次强黄沙过程的天气形势、气候背景;追朔了沙尘的源地及沙尘的输送方向、途径和影响范围。测定和分析了沙尘微粒的浓度、元素、组分等物理和化学特征。结果表明:沙尘的质量浓度较平时大10多倍,沙尘中的元素以亲石元素为主,主要来自于自然源,受人为污染的影响很小。

英文摘要:

      The favourable synoptic situation and climate background for a sandstorm process, which occurred in the period from the 9th to the 16th of April 1988, has been studied through analyzing weather maps, meteorological elements, satellite cloud pictures and sandstorm trajectories. The sand dust origin area, the directions and the paths of sand dust transportation and the extent the sand dust reached were also investigated. The results of measurments and analysis indicate that the concentration of sand dust particles is 10 times greater tb.an the normal. It is also shown that the elements in the sand dust are lithophile and come from natural source through the chemical composition analysis of the sand dust, so that the sand dust has not been seriously polluted by human activities.