天山乌鲁木齐河源1号冰川区气溶胶水溶性离子变化特征及来源分析  

Characteristics and Sources of Soluble Ions in Aerosols from Glacier No. 1 at the Headwater of Urumqi River,Tianshan Mountains,China

作　　者：岳晓英[1] 李忠勤[1,2] 张明军[1] 周平[2] 樊晋[3] 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070 [2]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/天山冰川观测试验站,兰州730000 [3]兰州大学大气科学学院,兰州730000

出　　处：《环境科学》2013年第10期3764-3771,共8页Environmental Science

基　　金：国家自然科学基金创新研究群体项目(41121001);国家自然科学基金项目(41001040;41161012);国家自然科学基金青年基金项目(41201065);中国科学院寒区旱区环境与工程研究所青年人才基金项目(51Y251B51)

摘　　要：基于2007年4、8和10月这3个时段不同季节的野外考察取样和实验室分析测试,探讨了天山乌鲁木齐河源1号冰川区气溶胶样品中水溶性离子成分的浓度组成、变化特征及其可能来源.结果表明,气溶胶水溶性离子平均浓度为2.76μg·m-3,化学组成以Ca2+、NO-3和SO2-4为主.Ca2+、SO2-4、NH+4、Na+、Mg2+、Cl-在春、夏、秋这3个季节的变化趋势与总离子浓度的变化趋势一致,均为夏季最高、秋季次之、春季最低,而K+与NO-3却呈现出秋季最高、夏季和春季浓度次之的季节变化特征.分析认为,气溶胶中Ca2+、Na+、Mg2+、K+和Cl-主要可能来自陆源矿物;而NO-3和NH+4则很大程度上以人为源为主.并且发现,SO2-4可能同时受陆地源与人类活动来源的影响.Major soluble ions were measured in 26 aerosol samples collected at Glacier NO. 1 at the headwater of Urumqi River in Tianshan Mountains in April, August and October 2007. The concentration, seasonal change and source of aerosol were analyzed. The results showed that the mean concentration of total soluble major ions of aerosol was 2.76 μg.m-3, Ca2＋ , NO3- and SO24- were the major soluble inorganic ion components. In spring, summer and autumn, the seasonal change of the mean concentration of total soluble inorganic ions was consistent with Ca2＋ , SO24- , NH4＋ , Na＋ , Mg2＋ and Cl- , the highest concentration was in summer, followed by autumn and spring. While the maximum concentration of K ＋ and NO3- was observed in autumn, the minimum was in spring. Soluble inorganic ion source characteristics were that： Ca2＋ , Na ＋ , Mg2＋ , K ＋ and Cl- were mostly the land source; NO3- and NH4 were mainly from the anthropogenic source. SO24- was mainly originated from both crustal surface and anthropogenic sources.

关 键 词：1号冰川 气溶胶 水溶性离子 特征 来源 

分 类 号：X131[环境科学与工程—环境科学] X513