Factors controlling the electrical conductivity of ice from the polar regions-A Summary
Factors controlling the electrical conductivity of ice from the polar regions-A Summary
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控制极地冰电导率的因素-A 摘要
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
J. Paren
中科院分区：
文献类型：
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作者：
E. Wolff;W. D. Miners;J. Moore;J. Paren
总结了极地冰芯电导率与化学成分之间关系的数据。电导率测量被用作直流电导率的替代指标，而介电剖面图则提供高频电导率。直流电导率似乎完全由冰的酸度控制，伴随的阴离子的次要影响。当大量过量的海盐、铵或钙存在时，没有积极的反应，除非在存在盐水的冰中。高频电导率受酸度、铵盐和氯化物的控制。这一发现可以在贾卡德理论中得到解释，但这三种离子在高频下的相对响应似乎令人费解。直流电导穿过晶界的可能性也是不能忽视的。
Data on the relationship between the electrical conductivity and the chemistry of ice cores from the polar regions are summarized. The electrical conductivity measurement is used as a proxy for dc conductivity, while dielectric profiling gives high-frequency conductivity. The dc conductivity seems to be controlled entirely by the acidity of the ice, with a secondary effect of the accompanying anion. There is no positive response when huge excesses of sea salt, ammonium, or calcium are present, except in ice where brine is present. The high-frequency conductivity is controlled by acidity, ammonium, and chloride. This finding can be accommodated within Jaccard theory, but the relative response at high frequency to the three ions seems puzzling. The possibility that dc conduction may be through grain boundaries can also not be discounted.