δD – δ18O Relationships in Ice Formed by Subglacial Freezing: Paleoclimatic Implications
δD – δ18O Relationships in Ice Formed by Subglacial Freezing: Paleoclimatic Implications
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冰下冻结形成的冰中 δD – δ18O 关系：古气候影响
DOI：
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发表时间：
1985
影响因子：
3.4
通讯作者：
J. M. de Groote
中科院分区：
文献类型：
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作者：
R. Souchez;J. M. de Groote
Abstract A freezing slope, distinct from that of precipitation, is displayed on a δD–δ18O diagram by basal ice in different circumstances. However, if the subglacial reservoir allowed to freeze is mixed in the course of time with an input having a lighter isotopic composition, basal ice cannot be distinguished from glacier ice in terms of slope. Such a situation is encountered at the base of Grubengletscher and is indicated by a computer simulation using the open-system model of Souchez and Jouzel (1984). Suggested implications for the paleoclimatic interpretation of deep ice cores recovered from the bottom part of polar ice sheets are given.
