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首页> 外文期刊>Geophysical Research Letters >Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007
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Tracer-derived freshwater composition of the Siberian continental shelf and slope following the extreme Arctic summer of 2007

机译:2007年极端北极夏季之后,西伯利亚大陆架和斜坡的示踪剂来源的淡水成分

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摘要

We investigate the freshwater composition of the shelf and slope of the Arctic Ocean north of the New Siberian Islands using geochemical tracer data (δ~(18)O, Ba, and PO_4~*) collected following the extreme summer of 2007. We find that the anomalous wind patterns that partly explained the sea ice minimum at this time also led to significant quantities of Pacific-derived surface water in the westernmost part of the Makarov Basin. We also find larger quantities of meteoric water near Lomonosov Ridge than were found in 1995. Dissolved barium is depleted in the upper layers in one region of our study area, probably as a result of biological activity in open waters. Increasingly ice-free conditions compromise the quantitative use of barium as a tracer of river water in the Arctic Ocean.
机译:我们使用2007年极端夏季之后收集的地球化学示踪数据(δ〜(18)O,Ba和PO_4〜*)调查了新西伯利亚群岛北部北冰洋陆架和斜坡的淡水成分。我们发现异常的风型在某种程度上解释了此时的海冰最小值,也导致了马卡罗夫盆地最西部的大量源自太平洋的地表水。与1995年相比,我们在罗蒙诺索夫山脊附近还发现了更多的大气水。溶解的钡在我们研究区域的一个区域的上层被耗尽,这可能是由于开放水域中的生物活性所致。越来越多的无冰条件损害了北冰洋中钡作为河水示踪剂的定量使用。

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