Distinctive 13C isotopic signature distinguishes a novel sea ice biomarker in Arctic sediments and sediment traps
Distinctive 13C isotopic signature distinguishes a novel sea ice biomarker in Arctic sediments and sediment traps
复制标题
DOI：
10.1016/j.marchem.2008.09.002
复制
发表时间：
2008-12-16
期刊：
影响因子：
3
通讯作者：
Fortier, Louis
中科院分区：
文献类型：
--
作者：
Belt, Simon T.;Masse, Guillaume;Fortier, Louis
此前曾有人提出，一种 C-25 高度支化类异戊二烯 (HBI) 单烯烃（指定为 IP25）源自生活在北极海冰中的硅藻，而沉积物中 IP25 的存在被认为是前北极海冰出现的代表。在这里，我们表明，海冰、海冰下收集的沉积物捕集材料以及高纬度北部沉积物中 IP25 的 C-13 同位素组成是独特的（同位素“重”），并且与浮游或陆源有机物的组成不同。 IP25 的平均 delta C-13 值为 -22.3 +/- 0.4 千分之一。 （海冰），-19.6 +/- 1.1 千分之一。 （沉积物捕集器）和 -19.3 +/- 2.3 千分之一。 （沉积物）。因此，这些测量结果。进一步支持使用 IP25 作为北极海冰代理的提议。 (c) 2008 Elsevier B.V. 保留所有权利。
A C-25 highly branched isoprenoid (HBI) monoene hydrocarbon, designated IP25, has been proposed previously to originate from diatoms living in Arctic sea ice, while the presence of IP25 in sediments has been suggested to be a proxy for the occurrence of former Arctic sea ice. Here, we show that the C-13 isotopic composition of IP25 in sea ice, in sediment trap material collected under sea ice, and in high latitude northern sediments, is distinctive (isotopically 'heavy') and distinguishable from that of organic matter of planktonic or terrigenous origin. Mean delta C-13 values for IP25 were -22.3 +/- 0.4 parts per thousand. (sea ice), -19.6 +/- 1.1 parts per thousand. (sediment traps) and -19.3 +/- 2.3 parts per thousand. (sediments). These measurements, therefore. support further the proposed use of IP25 as an Arctic sea ice proxy. (c) 2008 Elsevier B.V. All rights reserved.