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研究了天山东部雪冰中NO 3-浓度对中亚哈萨克斯坦生物质燃烧的响应情况.在天山乌鲁木齐河源1号冰川持续采集了52组表层雪与雪坑样本,分析了雪样中NO 3-等成分的浓度,运用HYSPLIT模型模拟了空气轨迹,目的是考察雪冰中NO 3-与2002年哈萨克斯坦草原大火的关系,探讨由生物质燃烧产生的NO 3-在高海拔山岳冰川雪层中的沉降效应.1号冰川表层雪中的NO 3-可以作为某些典型生物质燃烧的辅助表征物,2002年9月中旬～10月下旬,NO 3-浓度与传统燃烧指示剂K+浓度的相关系数高达0.74,明显高于常年平均值.从哈萨克斯坦的火点传送至1号冰川附近,一般需要2～6 d.携带生物质燃烧产物的气团,能否于1号冰川表层雪中保留信息在很大程度上取决于当地的气温与降水条件.1号冰川在湿季受淋溶作用影响显著,运用冰芯恢复古气候时应充分考虑到后沉积过程的影响.
The response of NO 3 concentration in winter ice and snow to the biomass burning in Kazakhstan in central Asia was studied.The 52 groups of surface snow and snow pits were continuously collected from Urumqi glacier No 1 in the Tianshan Mountains, - and other components of the concentration, the use of HYSPLIT model to simulate the air trajectory, the purpose is to examine the snow ice ice NO 3 and the 2002 Kazakhstan grassland blaze, to explore the NO 3 produced by biomass combustion in the high altitude mountain glacier snow layer In the surface glacier NO1 can be used as an auxiliary indicator of combustion of some typical biomass. From mid-September to late October 2002, NO3- concentration was positively correlated with the K + concentration of the traditional combustion indicator The correlation coefficient is as high as 0.74, which is obviously higher than the annual average value.It takes 2 ~ 6 d to reach the glacier near Kazakhstan from the fire point in Kazakhstan.Whether the air mass carrying biomass combustion products can be retained in the surface snow of Glacier No. 1 The information largely depends on the local temperature and precipitation conditions, and glacier No. 1 is significantly affected by leaching during wet seasons, and the use of ice cores to restore paleoclimate should take full account of post-depositional processes.