收稿日期: 2006-04-07
修回日期: 2006-10-09
网络出版日期: 2006-11-15
基金资助
中国科学院寒区旱区环境与工程研究所引进国外杰出人才基金项目（编号CACX2003101）；国家自然科学基金项目“天山乌鲁木齐河源1号冰川与奎屯河哈希勒根51号冰川冰雪过程观测与研究”（编号：40371028）和“干旱区周边山地冰芯中不溶微粒与粉尘记录研究”（编号：40301009）和“2000年来高分辨率气候环境记录研究”（编号：90102005）；国家自然科学基金创新群体项目资助.
Seasonal Evolution of Insoluble Microparticles Stratigraphy in Glacier No.1 Percolation Zone, Eastern Tianshan, China
Received date: 2006-04-07
Revised date: 2006-10-09
Online published: 2006-11-15
王飞腾 , 尤晓妮 , 李忠勤 , 朱宇曼 . 乌鲁木齐河源1号冰川不溶微粒的季节变化特征[J]. 地球科学进展, 2006 , 21(11) : 1164 -1170 . DOI: 10.11867/j.issn.1001-8166.2006.11.1164
The atmospheric dust is one of the most important factors in the global climate changes. Its effects include the scatter and reflect of solar insolation, the supply to the Iron fertilizer to ocean, and its restrain to rain. The microparticles record in ice cores is an excellent proxy for atmospheric dust. Therefore，the processes involved in the evolution of vertical profiles of microparticle concentrations as well as their seasonal variation in surface snow were studied by weekly sampling a snow pit from September 2003 to September 2004 on Glacier No.1 in the eastern Tianshan. The development of the microparticle stratigraphy in the snow pit is closely related to the physical development of the snow-firn pack. The sampling site is located at 4130 m asl in the percolation zone of the glacier, and in addition to the effects of sublimation and wind erosion, melting plays a crucial role in both the physical and chemical evolution processes. During the winter season, aerosol concentrations in the surface layers are altered slightly by sublimation and wind erosion, and the concentrations are further modified as the wet season begins in late April. In contrast, aerosol stratigraphy in the deeper layers remains relatively unchanged through the winter. In early summer, as melting occurs in the upper part of the snow-firn pack, meltwater carries microparticles to different depths in the underlying snow-firn layers. At the end of the ablation season, all of the surface elements might be leached out from the upper layers.
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