A comparison of radio-echo sounding data and electrical conductivity of the GRIP ice core

被引：56

作者：

Hempel, L

Thyssen, F

Gundestrup, N

Clausen, HB

Miller, H

机构：

[1] Univ Munster, Inst Geophys, D-48149 Munster, Germany

[2] Niels Bohr Inst Phys Astron & Geophys, DK-2100 Copenhagen, Denmark

[3] Alfred Wegener Inst Polar & Meeresforsch, D-27568 Bremerhaven, Germany

来源：

JOURNAL OF GLACIOLOGY | 2000年 / 46卷 / 154期

关键词：

D O I：

10.3189/172756500781833070

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

The depth of reflecting layers in Arctic ice sheets has been determined by electromagnetic echo sounding, using a varying distance between transmitter and receiver to determine the radar wave velocity. The depth of the radar reflecting layers is compared with a profile of electrical conductivity measurements (ECMs) from the Greenland Ice Core Project (GRIP) ice core, in order to determine the velocity of the radar waves in the ice cap. By using several reflecting layers, it is possible to isolate the firn correction of the wave velocity and to estimate the accuracy of the calculated electromagnetic wave velocity. The measured firn correction is compared with the correction calculated from the density profile, and a comparison between the depth profiles of ECM and radar based on the corrected electromagnetic wave velocity is presented. This profile shows that acid layers, which originate from major volcanic eruptions, show up as reflecting radar horizons.

引用

页码：369 / 374

页数：6

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