Organic carbon in Antarctic snow
Organic carbon in Antarctic snow
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DOI：
10.1029/2006gl028150
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发表时间：
2007-01
影响因子：
5.2
通讯作者：
W. Lyons;K. Welch;J. K. Doggett
中科院分区：
文献类型：
--
作者：
W. Lyons;K. Welch;J. K. Doggett
关于南极降水中有机成分的浓度和时间变化的信息很少。本文介绍了南极洲南维多利亚地泰勒谷高山冰川雪坑的TOC（总有机碳）分析结果。雪坑代表了20世纪90年代的积雪，TOC浓度非常低;大多数分析得出的值低于8 μM。这些值是有史以来报告的降水或积雪的最低值，表明南极洲沿海冰川雪中的TOC受陆地和人为有机碳排放的影响很小。TOC的来源仍然不清楚，但是TOC的变化与雪中的Cl−和其他主要离子呈负相关，这表明与海洋气溶胶和陆地尘埃不同的沉积源或沉积时间。
Little information exists about the concentration and temporal variations of organic components in Antarctic precipitation. We present results of TOC (total organic carbon) analyses from snowpits that were sampled on alpine glaciers in the Taylor Valley, Southern Victoria Land, Antarctica, at ∼78°S. The snowpits represent snow accumulation from the 1990s and the TOC concentrations are very low; most of the analysis yielded values below 8 μM. These values are some of the lowest ever reported for precipitation or snowpack and indicate that TOC in glacial snow in coastal Antarctica is little influenced by terrestrial and anthropogenic emissions of organic carbon. The sources of the TOC are still not known, however the TOC variation is negatively correlated to Cl− and the other major ions in the snow suggesting a different source or timing of deposition than the seasalt aerosols and terrestrial dust.