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

这一奖项是为了支持一个为期两年的项目，该项目继续使用根据上一笔赠款(发展伙伴关系-8922042)开发的90度激光光散射仪测量峰会冰芯沿线的粉尘浓度。作为该仪器的一部分，有一个特殊的加热器，它沿着岩心逐渐融化冰，并在90度的温度下吸入融化的水，由光电倍增管测量，并由计算机记录与融化的水中悬浮颗粒物的质量成比例的输出。用类似的技术对未融化的冰进行了激光散射的初步测量，初步结果是令人满意的。在这项研究中，激光在未融化冰上的散射技术将继续进行更多的工作。

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.