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大气中的微粒有好几种来源:(1)风从沙漠刮起的尘土;(2)火山爆发所喷出的火山灰;(3)风从海洋中刮起的海盐;(4)动植物遗体腐烂所产生的萜烃;(5)来自宇宙的微尘;(6)近数百年来燃烧散发出的烟油、烟尘、硫酸盐及硝酸盐等。 通过干空气的吹刮、降雨、降水和冲刷过程,一些微粒就被搬运和沉积在冰川和冰盖上。冰岩芯研究的目的就在于发现这样一种记录,解释微粒浓度与粒径分配随时间的变化。它有两个主要的研究对象:(1)把冰岩芯中微粒浓度与粒径变化作为大气浊度的标
There are several sources of particulates in the atmosphere: (1) wind blowing dust from the desert; (2) volcanic ash ejected from volcanic eruptions; (3) sea salt blowing from the ocean; and (4) remains of animals and plants (5) Dust from the universe; (6) Smoke, fume, sulphate and nitrate emanating from the burning of the past few centuries. Some particles are transported and deposited on glaciers and ice sheets by blowing dry air, raining, precipitation and scouring processes. The intent of the ice core study was to find such a record explaining the change in particle concentration and particle size distribution over time. It has two main research objects: (1) the ice core particle concentration and particle size changes as the standard turbidity of the air