Impact of Arctic shelf summer stratification on Holocene climate variability

Impact of Arctic shelf summer stratification on Holocene climate variability
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北极陆架夏季分层对全新世气候变率的影响

DOI:
10.1016/j.quascirev.2018.05.017
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发表时间:
2018
影响因子:
4
通讯作者:
J Knies
J Knies
中科院分区:
地球科学1区
文献类型:
--
作者:
Thibodeau B;Bauch HA;J Knies

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了解北极淡水和海冰输出的动态对于更好地理解近期气候变化的潜在后果至关重要。在这里,我们报告的氮同位素数据从拉普捷夫海的核心阐明全新世西伯利亚海侵对夏季分层的拉普捷夫海的影响。我们的数据表明,海洋环境是不太有利的海冰形成在拉普捷夫海早至中全新世。只有在海平面在4ka左右达到停滞后,拉普捷夫海的水柱结构才变得更加稳定。现代的条件,通常被描述为“海冰工厂”,达到约2万年前,一个强大的夏季分层后的发展。这些结果是一致的海冰重建沿着跨极漂移,突出了潜在的贡献,拉普捷夫海的淡水从北冰洋的出口。
Understanding the dynamic of freshwater and sea-ice export from the Arctic is crucial to better comprehend the potential near-future climate change consequences. Here, we report nitrogen isotope data of a core from the Laptev Sea to shed light on the impact of the Holocene Siberian transgression on the summer stratification of the Laptev Sea. Our data suggest that the oceanographic setting was less favourable to sea-ice formation in the Laptev Sea during the early to mid-Holocene. It is only after the sea level reached a standstill at around 4 ka that the water column structure in the Laptev Sea became more stable. Modern-day conditions, often described as “sea-ice factory”, were reached about 2 ka ago, after the development of a strong summer stratification. These results are consistent with sea-ice reconstruction along the Transpolar Drift, highlighting the potential contribution of the Laptev Sea to the export of freshwater from the Arctic Ocean.
过去 9 ka 期间弗拉姆海峡东部大西洋水平流与海冰前进的关系 - 两阶段全新世的多代理证据
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DOI: --
发表时间: 2005
期刊:
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