Initiation of the European deglaciation as recorded in the northwestern Bay of Biscay slope environments (Meriadzek Terrace and Trevelyan Escarpment): a multi-proxy approach
Initiation of the European deglaciation as recorded in the northwestern Bay of Biscay slope environments (Meriadzek Terrace and Trevelyan Escarpment): a multi-proxy approach
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比斯开湾西北部斜坡环境（Meriadzek 台地和 Trevelyan 悬崖）记录的欧洲冰川消融的起始：多代理方法
DOI：
10.1016/s0012-821x(01)00332-6
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发表时间：
2001
影响因子：
5.3
通讯作者：
T. Garlan
中科院分区：
文献类型：
--
作者：
S. Zaragosi;F. Eynaud;C. Pujol;G. Auffret;J. Turon;T. Garlan
根据欧洲末次冰期的历史，对比斯开湾西北坡的三个岩心进行了描述和讨论。这一综合沉积学和微体古生物学研究提供了海湾在最后冰解阶段的深层和海面条件的详细演化方案，并与大陆古环境有直接联系。早在15ka14c - bp，欧洲的前兆融化事件被记录为海峡和爱尔兰海古河流系统的清洗。“普林尼-海因里希事件条件”发生在14.4 - 13ka14c - bp之间的比斯开湾，典型的加拿大特征仅记录在14ka14c - bp，即比英国冰盖融化的第一个证据晚1 ka。我们的数据表明，在海因里希事件2之后，末次盛冰期的特征是逐渐变暖，伴随着至少两次北大西洋暖流的脉冲。这些北大西洋暖流/热量向北渗透，被认为是导致海因里希事件1崩塌的主要原因。
Three cores retrieved on the northwestern slope of the Bay of Biscay are described and discussed in the light of the European last deglaciation history. This integrated sedimentological and micropalaeontological study provides a detailed evolution scheme for the deep and sea-surface conditions of the Bay during the final deglacial step, with a direct link with the continental palaeoenvironments. As early as 15 ka14C-BP, a European precursor melting event is recorded as a purge of the Channel and Irish Sea palaeoriver systems. ‘Pleni–Heinrich event conditions’ occurred in the Bay of Biscay between 14.4 and 13 ka14C-BP with a typical Canadian signature only recorded at 14 ka14C-BP, namely 1 ka later than the first evidence of melting of the British Ice-sheet. Our data demonstrate that, following Heinrich event 2, the Last Glacial Maximum was characterised by a gradual warming accompanied by, at least, two pulses of the North Atlantic Drift. These North Atlantic Drift/heat northward penetrations are supposed to have primarily forced the Heinrich event 1 collapse.