Calibration of laser-light scattering measurements of dust concentration for Wisconsinan GISP2 ice using instrumental neutron activation analysis of aluminum : Results and discussion
Calibration of laser-light scattering measurements of dust concentration for Wisconsinan GISP2 ice using instrumental neutron activation analysis of aluminum : Results and discussion
复制标题
使用铝的仪器中子活化分析对威斯康星州 GISP2 冰的灰尘浓度进行激光散射测量的校准：结果和讨论
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Koenig
中科院分区：
文献类型：
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作者：
M. Ram;J. Donarummo;M. Stolz;G. Koenig
在过去的工作中，我们使用无泡冰的激光散射(LLS)来测量格陵兰中部的格陵兰冰盖项目2(GISP2)冰芯威斯康星州(冰川)段的尘埃浓度是如何变化的。在这篇文章中，我们展示了我们如何使用铝的仪器中子活化分析(INAA)来校准这一尘埃剖面。在定标过程中，我们发现，除NO_3−外，冰中存在的所有主要杂质(可溶和不溶)都呈线性变化。对于沙尘浓度，我们发现2600m以下冰的LLS信号与浅冰的LLS信号遵循不同的线性趋势。我们将其归因于大量微泡(直径0.3毫米)的存在，这些气泡在岩心提取后出现在更深的冰层中。
In past work we used laser-light scattering (LLS) from bubble-free ice to measure how the dust concentration varied along the Wisconsinan (glacial) section of the Greenland Ice Sheet Project 2 (GISP2) ice core from central Greenland. In this paper we show how we calibrated this dust profile using instrumental neutron activation analysis (INAA) of aluminum. In the course of the calibration, we found that excluding NO3−, all the major impurities (soluble and insoluble) present in the ice covaried linearly. With respect to the dust concentration, we find that the LLS signal from ice below a depth of 2600 m follows a different linear trend than the LLS signal from shallow ice. We attribute this to the presence of numerous microbubbles (diameter <0.3 mm) that emerged in the deeper ice following core extraction.