Investigations of Impurities containing in polar ice cores using laser based advanced spectroscopic techniques

该项目旨在利用基于激光的先进光谱技术研究极地冰芯中含有的杂质。(1)利用EERS和LIBS分别测量了溶液中水分子的取向和离子发射谱线。这种研究对于探测化学元素和研究冰中粒子的化学组成是有用的。(2)利用深紫外激光源的LIFS技术从微生物和有机物的荧光光谱中识别微生物和有机物，无需事先标记。我们可以通过激光激发测量荧光光谱，并证实了在冰芯中自然存在的未标记的微生物和有机物可以被光谱识别。(3)利用红外激光源研究了冰的熔化特性。在红外波段，冰强吸收，并沿激光照射路径钻出一个孔。这项技术对于冰钻和冰芯的无污染调查是非常有用的。

This project aimed to investigate impurities containing in polar ice cores using laser based advanced spectroscopic techniques.(1) The orientation of water molecules and ion emission line spectra in solutions were measured using EERS and LIBS, respectively. Such studies are useful for detecting chemical elements and investigate chemical compositions of particles in ice. (2) LIFS using deep UV laser source was applied to identify microbes and organic matter from their fluorescence spectra without prior labeling. We could measure fluorescence spectra by the laser excitation and confirmed that un-labeled microbes and organic matter naturally existing in ice cores can be spectroscopically identified. (3) We have studied the melting properties of ice using IR laser sources. In IR wavelength region ice strongly absorbs and a hole is drilled along the path of the laser irradiation. This technique could be very useful for ice drilling and contamination free investigations of ice cores.