Anthropogenic signals recorded in an ice core from Eclipse Icefield, Yukon Territory, Canada
Anthropogenic signals recorded in an ice core from Eclipse Icefield, Yukon Territory, Canada
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DOI：
10.1029/2001gl013037
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发表时间：
2001-12
影响因子：
5.2
通讯作者：
K. Yalcin;C. Wake
中科院分区：
文献类型：
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作者：
K. Yalcin;C. Wake
在一个新的冰芯收集在海拔3017米的日蚀冰原，东北45公里的山，硫酸盐和硝酸盐的年通量的趋势。洛根进行了检查，以确定人类活动对降水化学的影响，在偏远的西北北美对流层中层。在日食的硫酸盐和硝酸盐的年通量在20世纪40年代开始增加，第一次证明了北美北极西北部冰芯中的人为硫酸盐和硝酸盐污染。日食记录与区域总硫和氮氧化物排放量估计的比较表明，欧亚大陆是污染物到达日食的主要来源。现有的数据不允许有信心的评估欧洲与苏联排放量的相对重要性，在生产的硫酸盐和硝酸盐在日食观察到的趋势。
Trends in the annual flux of sulfate and nitrate in a new ice core collected at an elevation of 3017 m on Eclipse Icefield, 45 km northeast of Mt. Logan were examined to determine the effect of anthropogenic activity on precipitation chemistry in the remote northwest North America mid‐troposphere. The annual flux of both sulfate and nitrate at Eclipse began increasing in the 1940s, demonstrating, for the first time, the anthropogenic sulfate and nitrate pollution of the northwest North American Arctic in an ice core from this region. Comparison of the Eclipse record with regional emission estimates for total sulfur and nitrogen oxides suggests that Eurasia is the dominant source of pollutants reaching Eclipse. The available data does not permit a confident assessment of the relative importance of European versus Soviet emissions in producing the observed trends in sulfate and nitrate at Eclipse.