Precise dielectric profiling of ice cores: a new device with improved guarding and its theory

被引:67
作者
Wilhelms, F
Kipfstuhl, J
Miller, H
Heinloth, K
Firestone, J
机构
[1] Alfred Wegener Inst Polar & Marine Res, D-27568 Bremerhaven, Germany
[2] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
关键词
D O I
10.3189/S002214300000246X
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Dielectric profiling (DEP), a capacitive method for measuring an ice core's electrical conductivity and permittivity, has been in use for several years. We have built an improved DEP instrument with a modified guarded-electrode geometry whose capacitance can be determined from potential theory The new instrument can measure an ice core's conductivity and permittivity to within a few per cent error, a high enough accuracy to infer its density using well-known models.
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页码:171 / 174
页数:4
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