天山乌鲁木齐河源1号冰川大气气溶胶和新雪中可溶性离子关系研究  

Relationships Between Aerosol and Snow Chemistry on Glacier No.1 at Urumqi River Head,Eastern Tianshan Mountains,China

作　　者：张明军[1,2] 周平[1] 李忠勤[2,1] 赵淑惠[2] 金爽[1] 

机构地区：[1]西北师范大学地理与环境科学学院,甘肃兰州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站,甘肃兰州730000

出　　处：《地理科学》2010年第1期141-148,共8页Scientia Geographica Sinica

基　　金：国家自然科学基金项目(40701035;40631001;40571033);霍英东教育基金(101019);陇原青年创新人才扶持计划;西北师范大学知识与科技创新工程科研骨干培育项目(NWNU-KJCXGC-03-45)资助

摘　　要：在2007年4月、8月和10月三个时段内,分昼夜采集了23个气溶胶样品和7个新降雪样品,对样品中的可溶性离子进行了分析。结果表明,乌鲁木齐河源1号冰川(以下简称1号冰川)春、夏、秋三个季节气溶胶平均载量为86.22neq/m3,分析显示1号冰川存在NH4HSO4和(NH4)2SO4气溶胶,并有少量NH4NO3气溶胶存在。气溶胶和新雪样品中可溶性离子成分变化趋势相似,气溶胶浓度升高,新雪样品的浓度也会有所升高,反之亦然。气溶胶和新雪中Ca2+、Mg2+、Na+、Cl-、K+的相关性很好,说明雪中这些离子的浓度基本能反映大气中的状况;对气相和颗粒相并存的NH4+和NO3-来说,雪中的离子浓度和大气中的离子浓度不相关。Simultaneous samples of aerosol and fresh snow were collected at Glacier No.1 （4100 m a.s.l.）,Tianshan Mountains,between April 16 to 23,August 5 to 14,and October 10 to 24,2007.Aerosol and snow chemistry （including the species of Na＋,NH4＋,K＋,Mg2＋,Ca2＋,Cl-,NO3-and SO42-） is analyzed and discussed.Major ion concentrations in aerosol samples change heavily with the total ionic burden averaging 86.22 neq/m-3 at standard temperature and pressure （STP）.Interspecies aerosol relationships indicate the presence of NH4HSO4 and （NH4）2SO4 aerosol at Glacier No.1 also with NH4NO3.High scavenging ratio values are found for all species except SO42-.Periods of increased concentrations in the aerosol are generally reflected by increased concentrations in the snow,and vice versa.Correlation coefficients between aerosol and snow for Ca2＋,Mg2＋,Na＋,Cl-,K＋ show that snow chemistry basically reflects changes in the chemistry of the atmosphere.There are no significant correlations between aerosol and snow samples for NH4＋,NO3-and low correlation coefficient for SO42-.

关 键 词：乌鲁木齐河源1号冰川 气溶胶 气雪转换 可溶离子 

分 类 号：X142[环境科学与工程—环境科学]