Continuous Measurements of Dust Concentration and Stratigraphy Along the Summit Ice Core

这个奖项是为了支持一个为期两年的项目， 使用以下方法测量沿着萨米特冰芯的灰尘浓度： 90 °激光散射（LLS）仪器是根据 以前的补助金（DPP-8922042）。 作为该文书的一部分， 一种特殊的加热器，它可以使冰沿着核心沿着逐渐融化， 用光电倍增管测量90度的融水 和输出，这是成比例的质量悬浮 融水中的微粒物质，被电脑记录下来。 未融冰激光散射的初步测量 使用类似的技术已经取得了初步成果， 很有希望 更多关于激光技术的工作 在这项研究中，将继续在未融化的冰上进行散射。

This award is for support of a two year project to continue measurements of dust concentration along the Summit ice core using the 90o Laser-Light-Scattering (LLS) instrument developed under the previous grant (DPP-8922042). As part of this instrument there is a special heater that melts ice in increments along the core and sucks the meltwater at 90o is measured by a photomultiplier tube and the output, which is proportional to the mass of suspended particulate matter in the meltwater, is recorded by a computer. Preliminary measurements of laser light scattering on unmelted ice using a similar technique have been made and the initial results are promising. More work on the technique of laser light scattering on unmelted ice will be pursued in this study.