DETERMINATION OF ICE-SHELF BOTTOM MELTING BY TIME-DOMAIN REFLECTOMETRY

被引：2
|
作者：
GROSFELD, K
BLINDOW, N
机构：
来源：
JOURNAL OF GLACIOLOGY | 1993年 / 39卷 / 132期
关键词：
D O I：
10.3189/S0022143000016014
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
For our work in the Filchner-Ronne Ice Shelf Programme (FRISP), we have developed a new technique for measuring the bottom-melting rate with high reliability. The method is based on time-domain reflectometry (TDR) measurements of transmission lines inserted into melt holes. The TDR-data are digitally recorded on magnetic tape. System resolution has been estimated at 0.2 m. Hence, re-measuring after 1 year gives an accuracy of 10% for melting rates of 2 m a-1. Two transmission lines for TDR measurements were installed during the German FRIS Expedition 1989-90. This paper describes the design of the system. Examples of recorded wave forms are given.
引用
收藏
页码：353 / 356
页数：4
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