祁连山党河南山扎子沟29号冰川区雪、降水和地表水化学特征研究

A Study of Chemical Characteristics of Snow, Precipitation and Surface Water in the Basin of the Glacier No.29 in

党河南山地区的气候以干冷为主要特征，但这里的冰川仍属亚极地型．目前雪线较过去粗略推断有所上升．对冰川表面雪层、冰川侧融水、冰川前河水和降水样品的主要阴、阳离子分析表明，地表水主要受地表物质成分所控制，化学特征为HCO3、SO4－Ca型．将降水和雪层中离子浓度与其它地区对比后认为，大气中离子来源主要为陆地，人类污染影响很小．

The glaciers in Danghe Nanshan are developed under very dry and cold climate. The present snow-line, 4930 m a.s.l., is higher than that estimated roughly before. The measurement of main anions and canons has been made for some samples collected from surface snow on a glacier, meltwater beside the glacier, river water and rain water in front of the glacier. The result shows that the ionic composition of the surface water is controlled by the local surface chemical composition and basically belongs to HCO3, SO4-Ca type. Comparison of the ionic concentrations in snow and rain samples with those inneighbouring regions suggests that ions in atmosphere in these area are mainly from terrestrial origin and human activities have insignificant contribution.