Ice shelf density reconstructed from optical televiewer borehole logging
Ice shelf density reconstructed from optical televiewer borehole logging
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根据光学电视钻孔测井重建冰架密度
DOI：
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发表时间：
2013
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通讯作者：
J. Freitag
中科院分区：
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作者：
B. Hubbard;J. Tison;Morgane Philippe;B. Heene;F. Pattyn;T. Malone;J. Freitag
将光学电视光度测井与南极洲 Roi Baudouin 冰架上年温度相似（约 -14°C）和积累率对比（每年 0.23 和 0.43 m 水当量）的 520 个雪、冰和冰样本的重力测量密度进行比较。在≥10−1 m的尺度上，密度和光度之间记录了反指数关系（R2 = 0.96），这表明（i）光学电视光度为此类冰架的密度提供了有效的代表，并且（ii）密度可以从其他地方用热水钻出的钻孔重建，而不需要岩心材料。我们的分析还表明，这种关系可能适用于新形成的冰以及雪和雪。在 ≤10−1 m 的尺度上，光度和密度都显示出相似的模式，但精确的相关性因两个记录之间的详细差异而受到干扰。
Optical televiewer luminosity logs are compared with densities measured gravimetrically on 520 snow, firn, and ice samples from two locations of similar annual temperature (~ −14°C) and contrasting accumulation rates (0.23 and 0.43 m water equivalent per year) on the Roi Baudouin Ice Shelf, Antarctica. At the scale of ≥10−1 m, an inverse exponential relationship (R2 = 0.96) is recorded between density and luminosity, indicating (i) that optical televiewing luminosity provides an effective proxy for density at such ice shelves and (ii) that densities may be reconstructed from boreholes drilled elsewhere by hot water without the need for core material. Our analysis also suggests that this relationship may hold for newly formed ice as well as for snow and firn. At the scale of ≤10−1 m, both luminosity and density show similar patterns, but precise correlation is confounded by detailed differences between the two records.