Microscopic analyses of insoluble particles in an ice core of Ürümqi Glacier No. 1: Quantification of mineral and organic particles
Microscopic analyses of insoluble particles in an ice core of Ürümqi Glacier No. 1: Quantification of mineral and organic particles
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DOI：
10.1007/s12583-011-0197-2
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发表时间：
2011-07
影响因子：
3.3
通讯作者：
N. Takeuchi;Yoriko Ishida;Zhong-qin Li
中科院分区：
文献类型：
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作者：
N. Takeuchi;Yoriko Ishida;Zhong-qin Li
冰芯中的不溶性颗粒浓度通常被分析为大气矿物粉尘（气溶胶浓度）变化的替代物。然而，最近的研究表明，矿物粉尘不仅是颗粒的组成部分，而且还含有生物有机颗粒。我们在天山东部的乌鲁木齐1号冰川上钻取了一个浅冰芯，对冰芯中的不溶性颗粒进行了显微分析。我们区分了冰芯中不同形态的颗粒，并分别对其进行了定量。结果表明，冰芯中的不溶性颗粒主要由矿物颗粒、无定形有机颗粒、花粉和微生物组成。矿物颗粒是最主要的，约占总颗粒的67%，无定形有机颗粒是第二大优势，约占总颗粒的33%。在过去的11年中的颗粒的年度变化不同的矿物和无定形有机颗粒。结果表明，冰芯中不溶性颗粒物的总浓度不仅反映了大气矿物尘，而且还反映了从地面土壤吹来的有机颗粒物或冰川表面微生物产生的有机颗粒物。
Insoluble particle concentration in ice cores is commonly analyzed as a proxy for variations in atmospheric mineral dust (aerosol concentration). However, recent studies have revealed that the mineral dust is not only a constituent of the particles but that biogenic organic particles are also contained. We microscopically analyzed insoluble particles in a shallow ice core drilled on a mountain glacier, the Ürümqi Glacier No. 1, in eastern Tienshan, China. We distinguished different morphological particles in the ice core and quantified them separately. Results showed that the insoluble particles in this ice core consisted mainly of mineral particles, amorphous organic particles, pollen, and microorganisms. Mineral particles were the most dominant, accounting for approximately 67% of total particles, and amorphous organic particles were the second most dominant, accounting for approximately 33% of the total. The annual variation in the particles for the last 11 years differed between mineral and amorphous organic particles. The results suggest that the total insoluble particle concentration in the ice core reflects not only the atmospheric mineral dust but also the organic particles blown from ground soil or produced by microbes on the glacial surface.