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环境化学  2015 

天山乌鲁木齐河源区表层雪中含氮离子季节变化特征

Keywords: 天山,表层雪,季节变化,氮循环

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Abstract:

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(NO3-与NH4+)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NO3-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NO3-浓度在干季存在显著的相关性,在湿季相关性差,而NH4+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.

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