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- This paper aims to make a discussion and analysis of the sand dust aerosols, their origin and their propagation and sinking process. 从沙尘气溶胶的源地、输送及清除等几方面,讨论了沙尘天气发生的基本条件,即强风、大尺度环流形势和中尺度天气系统。
- Sand dust aerosol 沙尘气溶胶
- Onqin Daga Sandland is one of important sources of dust aerosol in China. 浑善达克沙地是我国主要沙尘气溶胶源地之一,但对其沙尘气溶胶特征一直缺乏研究。
- Finally, both the raising vertical velocity and dust aerosol concentration increased. 该机制在沙尘体中上部随着短波辐射的累积,逐步使沙尘浓度和垂直速度共同增大;
- Radiative forcing is affected sensitively by the change of single scattering albedo of dust aerosol. 辐射强迫数值对矿物尘气溶胶单次散射反照率的变化较敏感.
- Sand dust storm is a catastrophically climate mainly occurring in arid or semi-arid region. 摘要沙尘暴是主要发生于乾旱、半乾旱地区的一种危害极大的灾害性天气。
- In the special terrain and weather case, radiative effects of dust aerosol can changethe wind direction, and transport the dust back. 在特殊的地形、气象场下,沙尘辐射效应的累积可能会引起风向的变化,使堆积的沙尘重新逆着原方向输送。
- Based on the scattering properties of nonspherical dust aerosol, a new method is developed for retrieving dust aerosol optical depths of dusty clouds. 本文基于非球形沙尘气溶胶的散射特性，发展了一种能够反演沙尘云中沙尘气溶胶光学厚度的方法。
- The sand of Yanchi station during sand dust storm not only come from the background source but also the local supply. 形成盐池站多沙尘暴天气的沙源，除背景沙源外，本地沙源的补充也有重要作用。
- Meets the thunderstorm, the sand dust and so on the heavy weather is, should windward machine finish the preparation in these aspects? 遇到雷雨、沙尘等恶劣天气是，应对风机在那些方面作好准备？
- Recently, north part of our country the region frequently had the gale sand dust weather. What is called the sand dust weather?... 近日，我国北方地域频繁发生大风沙尘天气。什么叫沙尘天气呢？...
- Today blowing sand dusts the town and silts its harbor. 如今，飞扬的沙尘弥漫了小镇，掩盖了港口。
- However, 70 X 104 km2 of grassland became sources of sand dust because of soil wind erosion, which account for 30.4% of all sand dust sources, and 38% of all grassland in China. 但有近75万km~2的草地发生风力侵蚀并为沙尘暴提供物质来源，占总物质来源地的30.;4%25，占全国草地面积的38%25。
- According to the origin,sand dust weather in Qingdao region is classified as outlandish drifting type,inlandish forming type and outlandish drifting-inlandish strengthening type. 按照沙尘的源地和起因,将青岛地区的沙尘天气大体分为外地漂移型、本地生成型以及外地漂移在本地加强型。
- When the "turbid wind" with almost a saturated sand concentration changes to a refreshing breeze after getting rid of the sand dust around the protective net, it exhibits an even more powerful wind abrasion when blowing across the cliff region. 当含沙量几乎饱和的"浑浊之风"在防护网前后卸下沙尘变成清风，在吹过崖区时便显出更强的风蚀作用。
- THE STUDY ON THE TRANSPORT OF DUST AEROSOL IN CHINA 中国地区沙尘气溶胶输送过程的数值模拟
- When the "turbid wind" with almost a saturated sand concentration changes to a refreshing breeze after getting rid of the sand dust around the protective net,it exhibits an even more powerful wind abrasion when blowing across the cliff region. 当含沙量几乎饱和的“浑浊之风”在防护网前后卸下沙尘变成清风，在吹过崖区时便显出更强的风蚀作用。
- Keywords dust aerosol;stability;stratus; 沙尘;稳定度;层云;
- In the sand dust environment, the wear rate of polymer tapes are on the magnitude of 10-6-10-4 and 10-5-10-3 (mm3/N.m) respectively.The wear rate of PEN tape is 4-14 times higher than PI tape. 沙尘环境中PI、PEN薄带的磨损率大小分别处于10-6-10-4、10-5-10-3数量级范围，PEN薄带的平均磨损率是PI薄带的4-14倍。
- Based on the data of sunshine, cloud amount, haze, fog, sand dust, from 1954 to 2005, at Dezhou, Shandong Province, the climate tendency is calculated with the least square method. 摘要通过分析德州市1954-2005年日照、云量、霾、雾、沙尘等资料，用最小二乘法计算气候倾向率。
