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中文摘要：
通过2004—2005年夏季在天山哈密庙尔沟平顶冰川采集的雪坑样品,对冰川积雪中大气粉尘的沉积特征进行了分析研究.分析结果表明,哈密庙尔沟平顶冰川粒径介于0.57〈d〈26μm微粒的平均质量浓度是3690μg.kg-1,粉尘年均沉积通量约92.3μg.cm-2;与北半球其它地区类似研究相比明显较高,哈密庙尔沟平顶冰川受中亚粉尘源区影响很大.雪坑微粒浓度剖面和离子相关性分析表明,庙尔沟平顶冰川积雪中厚污化层富含亚洲粉尘颗粒的富Ca2＋和Na＋矿物;微粒体积-粒径分布众数介于3—23μm,并且表现出明显的沙尘与非沙尘季节的分布差异.同时,用后向气团轨迹分析法验证了该区大气粉尘的传输路径,发现研究区沙尘与非沙尘季节大气粉尘来源不同,分别来源于西北和西南方向,这对研究区大气粉尘的传输和沉降造成了很大影响.
英文摘要：
Deposition of atmospheric dust was measured in snow deposited on Miaoergou Glacierin Hami in Tian shan Mountains,China.Mean mass concentration of micro-particles with 0.57d26 μm in the snowpack is 3690 μg·kg-1.Dust flux to the glacier is about 92.3 μg·cm-2a-1 for particles.Dust layers in the snow cover contain Ca-rich materials typically found in Asian dust particles.Vertical profile of Na＋concentration in the snowpack is also very similar with dust＇s.Volume size distributions of dust particles in the snow showed single-modal structures having volume median diameters from 3—23μm.Backward trajectory was also employed to examine the transport process of air mass in this region.
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