کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1261953 1496716 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Distinctive 13C isotopic signature distinguishes a novel sea ice biomarker in Arctic sediments and sediment traps
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Distinctive 13C isotopic signature distinguishes a novel sea ice biomarker in Arctic sediments and sediment traps
چکیده انگلیسی

A C25 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 13C 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 δ13C values for IP25 were − 22.3 ± 0.4‰ (sea ice), − 19.6 ± 1.1‰ (sediment traps) and − 19.3 ± 2.3‰ (sediments). These measurements, therefore, support further the proposed use of IP25 as an Arctic sea ice proxy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Chemistry - Volume 112, Issues 3–4, 16 December 2008, Pages 158–167
نویسندگان
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