Raman spectroscopic study on the spatial distribution of nitrogen and oxygen in natural ice clathrates and their decomposition to air bubbles
Raman spectroscopic study on the spatial distribution of nitrogen and oxygen in natural ice clathrates and their decomposition to air bubbles
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DOI：
10.1029/95gl03660
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发表时间：
1996-01-15
影响因子：
5.2
通讯作者：
Kuhs, WF
中科院分区：
文献类型：
--
作者：
Pauer, F;Kipfstuhl, J;Kuhs, WF
我们展示了拉曼光谱扫描的结果，通过格陵兰岛核心项目（GRIP）深冰芯中的笼形物确定不同平面上的N-2/O-2比率，其中扫描的两个轴彼此垂直。在拉曼光谱的精度范围内，单个焦平面的光谱没有指向笼形物样品中N-2/O-2浓度的分选效应。在第二项研究中，N-2和O-2峰的频移是由于笼形物分解成气泡而定性地显示的。从它们的峰值积分来看，笼形物的氧和氮含量之间没有不同的再转化速率。我们在包合物中观察到的N-2/O-2比值以及在包合物分解的不同阶段中观察到的N-2/O-2比值保留在包合物分解产生的气泡的测量中。
We present the results of Raman spectroscopic scans to determine the N-2/O-2 ratios on different planes through a clathrate in the GReenland fee Core Project (GRIP) deep ice core, in which the two axes of the scans are perpendicular to one another. The spectra of the individual focal planes do not point to fractionation effects of the N-2/O-2 concentrations within a clathrate specimen in the range of the precision of Raman spectroscopy. In a second study, the frequency shift of the N-2 and O-2 peaks due to decomposition of a clathrate to an air bubble is shown qualitatively. From their peak integrals, there is no indication of different retransformation rates to air bubbles between the oxygen and the nitrogen contents of clathrates. The N-2/O-2 ratios we observe in clathrates and on clathrate decomposition at different stages are retained in our measurements of air bubbles resulting from clathrate decomposition.