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冰芯是全球气候变化研究的重要对象,通过物理和化学手段可提取其中的古气候信息。作为物理分析技术之一,冰芯导电测量技术可分为ECM和DEP 2类,已运用到多个冰芯项目中。其主要反映了冰芯电学性质受温度、压力、杂质等因素影响而产生的变化,而导致这些变化的原因可从宏观和微观方面进行解释和探究。冰芯导电测量获得的结果可应用于定年、火山事件、积累率、生物质燃烧、离子浓度恢复等多领域研究,对帮助系统认识第四纪晚更新世以来的南极气候演变过程具有重要意义。通过详细总结极地冰芯导电性质及测量技术的主要研究成果,探讨了该技术在中国Dome A深冰芯项目中的应用前景。
Ice core is an important object of global climate change research, which can extract the ancient climate information through physical and chemical means. As one of the physical analysis techniques, ice core conductivity measurement technology can be divided into ECM and DEP 2 categories, which have been applied to many ice core projects. It mainly reflects the change of electrical properties of ice core influenced by the factors such as temperature, pressure and impurities, and the reasons leading to these changes can be explained and explored from macroscopic and microscopic aspects. The results obtained from the ice core conductivity measurement can be applied in many fields such as dating, volcanic events, accumulation rate, biomass combustion and ion concentration recovery, which are of great significance in understanding the evolution of the Antarctic climate since the Late Pleistocene. The application prospects of this technology in the Dome A deep ice core project in China are discussed by summarizing the main research results of the conductive properties of polar ice cores and measuring techniques.