1991-2000年中国北方地面起尘The Dust Emission of Northern China in 1991-2000
刘国梁
摘要(Abstract):
利用美国EPA的起尘公式,本文计算了1991-2000年间中国北方的地面起尘(PM50,粒经小于50μm的颗粒物)分布。结果表明:1991-2000年整体上中国北方的起尘是从西到东减小,起尘的量级变化幅度达5个量级,年起尘总量为9.24×106t。春季是起尘最多的季节,占年起尘总量的一半以上。和1951-1980年的起尘相比,1991-2000的年起尘总量只有1951-1980的年起尘总量的21.5%,最大值所处的位置也由塔克拉玛干沙漠中心向东移动到青海和新疆的交界地区,为0.51 t/(a.hm2)。
关键词(KeyWords): 中国北方;起尘;细粒子;空间分布
基金项目(Foundation):
作者(Author): 刘国梁
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