天山乌鲁木齐河源区表层雪中含氮离子季节变化特征  

SEASONAL VARIATIONS OF NITROGEN-CONTAINING IONS CONCENTRATION IN SURFACE SNOW AT THE HEADWATERS OF URUMQI RIVER,TIANSHAN MOUNTAINS

作　　者：王圣杰[1] 张明军[1,2] 王飞腾[2] 李忠勤[2,1] 李亚举[1] 

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/天山冰川站,兰州730000

出　　处：《环境化学》2011年第8期1445-1450,共6页Environmental Chemistry

基　　金：国家自然科学基金项目(40701035;40631001;40571033;40701034;J0630966);教育部新世纪优秀人才支持计划项目(NCET-10-0019);陇原青年创新人才扶持计划项目;国家重点基础研究发展规划(973)项目(2010CB951003;2007CB411501);中国科学院知识创新工程重要方向项目(KZCX2-YW-127);冰冻圈科学国家重点实验室自主研究项目;西北师范大学知识与科技创新工程创新团队项目(NWNU-KJCXGC-03-66);科研骨干培育项目(NWNU-KJCXGC-03-78)资助

摘　　要：通过2004—2007年在天山乌鲁木齐河源1号冰川积累区采集的136个表层雪样品,分析了山岳冰川表层雪中主要含氮离子(NO-3与NH+4)的季节变化特征.结果表明,湿季表层雪中的含氮离子浓度一般比干季高,由于湿季NO-3与NH4+的输入量与流失量均较大,因此湿季浓度波动比干季更强烈.气溶胶与表层雪中的NO-3浓度在干季存在显著的相关性,在湿季相关性差,而NH+4浓度则表现出相反的特征.表层雪中含氮离子浓度大多高于极地和青藏高原,原因在于本研究区受粉尘输入与人类活动的影响较大.To investigate the seasonality of nitrogen-containing ions in surface snow of mountain glacier,136 samples of surface snow were collected in a weekly frequency from 2004 to 2007 in the accumulation zone of Glacier No.1 at the headwaters of Urumqi River,eastern Tianshan Mountains,and were analyzed for NO-3 and NH＋4 concentrations.The results indicate that the concentrations in wet seasons（from April to October） were higher than those in dry seasons（from November to March）.Strong fluctuation of concentrations was observed in wet seasons due to significant input and output of nitrogen-containing ions in wet seasons.Correlation between NO-3 concentrations in aerosol and surface snow is much higher in wet seasons than that in dry seasons,while correlation for NH＋4 is the opposite.Concentrations of NO-3 and NH＋4 in the sampling sites,which are affected by dust transportation and anthropogenic activities,are usually higher than those in Polar Regions or Tibetan Plateau.

关 键 词：天山 表层雪 季节变化 氮循环 

分 类 号：X13[环境科学与工程—环境科学]