冰芯不溶微粒中一些痕量元素是定量揭示冰芯中粉尘记录的代用指标，通过对不溶微粒中这些痕量元素记录的信息的提取，可帮助我们定量解释与冰芯中粉尘的起源、传输和沉降等方面的一些问题。格陵兰NEEM计划的目标在于详细地反演末次间冰期及其以来气候环境的变化规律。.本项目利用高分辨电感耦合等离子体质谱仪(Element ICP-MS),针对NEEM冰芯不溶微粒中痕量元素Al、Fe、Ti、Mn、Sc、Rb、Sr、Ba、Cu、Zn、Pb等的浓度，建立这些痕量元素的可溶性浓度和总浓度的样品前处理以及测试方法。降低过程空白值以及完全富集不溶微粒的方法是两个关键问题。在建立可靠方法的基础上开展2537.36mNEEM冰芯中两种痕量元素浓度的测试，通过计算获得不溶微粒中痕量元素浓度的可靠数据. 这些数据为重建末次间冰期及其以来、过去几个气候旋回期间痕量元素自然地球化学循环提供可靠基础。

Trace elements such as Al，Fe，Sc，Ti，Mn，Sr，Ba etc, in insoluble particle are alternative indicators of dust records in ice core. They can help us to interpret questions related with sources、transport and deposition of dust in ice core. .The object of NEEM ice core is to reconstruct the features of climatic environment of the last inter-glacial period and help to make knowledge of present climate of which similar feature to the last inter-glacier period. .In order to obtain concentrations of trace elements such as Al、Fe、Mn、Ti、Sc、Sr、Ba、Cu、Zn、Pb etc., in insoluble dust in NEEM ice core from Greenland, the objective of the project is at first focusing on establishing methods on treating samples for determining soluble and total concentrations of trace elements in ice core.Based on the established method, both concentrations of these trace elements from about 500 ice core samples from north Greenland 2537.36 m NEEM ice core will be determined by inductively coupled plasma sector field mass spectrometry(ICP-SFMS) .The concentrations of these trace elements in insoluble particle calculated then based on both concentrations..The preliminary established method for treating samples for total concentrations of trace elements selected through preceding experiments is sub-boiling evaporation and followed by acid-digestion. The accurate of the method for acid-digestion samples can be evaluated through treating standard reference material of soil using the same method as that for ice core samples..The key problems for determining outra-low concentrations of trace elements in ice core are how to reduce blanks of trace elements during procedures related with treating ice core samples and how to concentrate total insoluble particle.. The reliable data obtained from the established method of the project will be used to reconstruct the past geochemical cycles of trace elements at the last inter-glacial and afterwards,as well as the past several typical climatic cycles.