Rapid optical method for logging dust concentration versus depth in glacial ice

被引：6

作者：

Miocinovic, P ^{[1
]}

Price, PB ^{[1
]}

Bay, RC ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

APPLIED OPTICS | 2001年 / 40卷 / 15期

关键词：

D O I：

10.1364/AO.40.002515

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe the design and simulated response of a dust logger consisting of a downward-pointing phototube, similar to2 m below side-directed light-emitting diodes (ZEDs), attached to a cable that can lower the device down a 3-in. (7.5-cm) borehole filled with butyl acetate. ZED photons that enter the ice are scattered or absorbed by dust grains, and those that reach the phototube provide a measure of dust or volcanic ash concentration at a given depth. An increased dust concentration associated with an ancient colder climate will usually result in an increase in collected light, but may decrease collected light if air bubbles are present. Centimeter-thick volcanic ash hands can also be detected. The concept is based on six years of experience with pulsed light sources used to measure optical properties of deep Antarctic ice. (C) 2001 Optical Society of America.

引用

页码：2515 / 2521

页数：7

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