Ruth Urs, Barbante Carlo, Bigler Matthias, Delmonte Barbara, Fischer Hubertus, Gabrielli Paolo, Gaspari Vania, Kaufmann Patrik, Lambert Fabrice, Maggi Valter, Marino Federica, Petit Jean-Robert, Udisti Roberto, Wagenbach Dietmar, Wegner Anna, Wolff Eric W
Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven, Germany.
Environ Sci Technol. 2008 Aug 1;42(15):5675-81. doi: 10.1021/es703078z.
To improve quantitative interpretation of ice core aeolian dust records, a systematic methodological comparison was made. This involved methods for water-insoluble particle counting (Coulter counter and laser-sensing particle detector), soluble ion analysis (ion chromatography and continuous flow analysis), elemental analysis (inductively coupled plasma mass spectroscopy at pH 1 and after full acid digestion), and water-insoluble elemental analysis (proton induced X-ray emission). Antarctic ice core samples covering the last deglaciation from the EPICA Dome C (EDC) and the EPICA Dronning Maud Land (EDML) cores were used. All methods correlate very well among each other, but the ratios of glacial age to Holocene concentrations, which are typically a factor approximately 100, differ between the methods by up to a factor of 2 with insoluble particles showing the largest variability. The recovery of ICP-MS measurements depends on the digestion method and is differentfor different elements and during different climatic periods. EDC and EDML samples have similar dust composition, which suggests a common dust source or a common mixture of sources for the two sites. The analyzed samples further reveal a change of dust composition during the last deglaciation.
为了改进冰芯风尘记录的定量解释，我们进行了系统的方法比较。这涉及到水不溶性颗粒计数方法（库尔特计数器和激光传感颗粒探测器）、可溶性离子分析（离子色谱法和连续流动分析）、元素分析（pH值为1时以及完全酸消解后的电感耦合等离子体质谱法）以及水不溶性元素分析（质子激发X射线发射）。我们使用了来自欧洲项目冰芯气候档案（EPICA） Dome C（EDC）和EPICA毛德皇后地（EDML）冰芯的覆盖末次冰消期的南极冰芯样本。所有方法之间的相关性都非常好，但冰川期与全新世浓度的比值（通常约为100倍）在不同方法之间相差高达2倍，其中不溶性颗粒的变化最大。电感耦合等离子体质谱测量的回收率取决于消解方法，并且对于不同元素以及在不同气候时期有所不同。EDC和EDML样本具有相似的粉尘成分，这表明这两个地点有共同的粉尘来源或共同的混合来源。分析的样本进一步揭示了末次冰消期期间粉尘成分的变化。
