【摘要】 基于2004-2009年间在天山托木尔峰青冰滩72号冰川、奎屯河哈希勒根51号冰川、乌鲁木齐河源1号冰川、博格达峰四工河4号冰川与庙尔沟平顶冰川积累区采集的雪坑样品,分析了中国天山冰川积雪中NO3-与NH4+的空间分布特征及其环境意义.结果表明,积雪中NO3-平均浓度顺序为哈希勒根51号冰川<乌鲁木齐河源1号冰川<庙尔沟平顶冰川<青冰滩72号冰川<四工河4号冰川,而NH4+平均浓度顺序为青冰滩72号冰川<哈希勒根51号冰川<庙尔沟平顶冰川<乌鲁木齐河源1号冰川<四工河4号冰川.结合HYSPLIT空气轨迹模型与局地环境状况资料分析,这种空间差异受到远源污染与沙漠粉尘传输、近源工农业生产与生活排放、冰川积累区地理环境等因素的综合影响.更多还原

【Abstract】 In order to investigate the spatial distribution and its environmental significance of nitrate(NO3)and ammonium(NH4+)in snowpack of glaciers in the Chinese Tianshan Mountains,the snow samples were collected at the accumulation zone on five typical glaciers from west to east:Glacier No.72at Qingbingtan of Tomur Peak(QG72),Glacier No.51at Haxilegen of Kuytun River(HG51),Urumqi Glacier No.1(UG1),Glacier No.4 at Sigong River of Bogda Peak(SG4),and Miaoergou Flat-topped Glacier(MG)during 2004-2009.It is found that the concentration order of NO3-in snowpack is HG51<UG1<MG<QG72<SG4,and the concentration order of NH4+ is QG72< HG51<MG<UG1<SG4.The NOAA HYSPLIT air trajectory model and local environmental data demonstrate that the spatial distribution of nitrogen-containing ions is influenced by the long-distance pollution and atmospheric dust,the local anthropogenic output including industry and agriculture,as well as the sampling conditions.更多还原