期刊
JOURNAL OF GLACIOLOGY
卷 54, 期 186, 页码 463-468出版社
CAMBRIDGE UNIV PRESS
DOI: 10.3189/002214308785837020
关键词
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资金
- European Space Agency
- UK Natural Environment Research Council [NER/O/S/2003/00620]
- Norwegian Research Council
- NERC [cpom20001] Funding Source: UKRI
- Natural Environment Research Council [cpom20001] Funding Source: researchfish
On an 11 m firn/ice core from Kongsvegen, Svalbard, we have used dielectric profiling (DEP) to measure electrical properties, and digital photography to measure a core optical stratigraphy (COS) profile. We also used a neutron-scattering probe (NP) to measure a density profile in the borehole from which the core was extracted. The NP- and DEP-derived density profiles were similar, showing largescale (>30cm) variation in the gravimetric densities of each core section. Fine-scale features (<10cm) are well characterized by the COS record and are seen at a slightly lower resolution in both the DEP and NP records, which show increasing smoothing. A combination of the density accuracy of NP and the spatial resolution of COS provides a useful method of evaluating the shallow-density profile of a glacier, improving paleoclimate interpretation, mass-balance measurement and interpretation of radar returns.
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