The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
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大西洋伊比利亚山脉冰消期的时间：对埃什特雷拉山脉（葡萄牙）湖泊序列的地层分析的见解
DOI：
10.1002/esp.5536
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发表时间：
2023
影响因子：
3.3
通讯作者：
Hernández A
中科院分区：
文献类型：
--
作者：
Hernández A
了解位于大西洋伊比利亚山脉等过渡性气候带的地区对末次冰期终止的环境响应，对于估计受当前冰川融化影响地区的潜在变化至关重要。我们提供了一份8.5米长的固体末次消冰和全新世年代地层记录，其中包括来自Serra da Estrela（葡萄牙中部）的前冰川湖泊peix<e:1>湖的详细沉积物分析。年龄深度模型依赖于贝叶斯方法，包括16个AMS14C日期和210pb - 137cs测量，可靠地确定了湖泊形成的时间为14.7±0.32 cal。ka BP。这种年代重建显示平均沉积速率约为0.07 cm yr - 1(15 yr cm - 1)，从而能够在年代际时间尺度上进行代用分析。沉积层序由5个岩性单元组成：（U1）粗质、未分选的河流-冰川湖相沉积；（U2）块状河流冰川湖相沉积（863-790 cm以下）[bsf]; 14.7±0.32-13.8±0.12 cal。ka BP);（U3）水流冰川湖相沉积（790-766 cm bsf; 13.8±0.12-12.9±0.29 cal）。ka BP);（U4）层状/带状湖泊沉积，以冰湖期陆源沉积和偶发性冰雪融化事件为特征（766 ~ 752 cm bsf; 12.9±0.29 ~ 11.7±0.15 cal）。ka BP);（U5）块状泥质湖相沉积（752-0 cm bsf; 11.7±0.15 cal）。ka BP-present)。U2 - U4矿床的出现标志着冰期冷（U1）向冰期后净暖（U5）的转变。这些气候变化的特征是沉积物的变化和极低沉积速率时期的存在，可能与新仙女木期和新仙女木期最冷的时期有关。我们的研究结果支持先前提出的Serra da Estrela冰川退缩的时间约为13.8±0.12 cal。ka BP。peix<e:1>湖强有力的年代学显示了伊比利亚前冰川湖泊在定年脱冰过程中的潜力，并将导致该地区自末次冰期-间冰期过渡以来前所未有的十年至百年时间尺度的古气候重建。
Understanding the environmental response to the last glacial termination in regions located in transitional climate zones such as the Atlantic Iberian mountains is crucial to estimate potential changes in regions affected by current glacial melting. We present an 8.5 m‐long, solid last deglaciation and Holocene chronostratigraphic record including detailed sediment analysis from Lake Peixão, a pro‐glacial lake in the Serra da Estrela (Central Portugal). The age–depth model relies on a Bayesian approach that includes 16 AMS14C dates and210Pb–137CS measurements, robustly dating the lake formation at 14.7 ± 0.32 cal. ka BP. This chronological reconstruction shows an average sedimentation rate of ca. 0.07 cm yr−1(15 yr cm−1), enabling proxy analyses at decadal timescales. The sediment sequence is composed of five lithological units: (U1) coarse and unsorted fluvioglacial lacustrine deposits; (U2) massive fluvioglacial lacustrine deposits (863–790 cm below surface [bsf]; 14.7 ± 0.32–13.8 ± 0.12 cal. ka BP); (U3) water current fluvioglacial lacustrine deposits (790–766 cm bsf; 13.8 ± 0.12–12.9 ± 0.29 cal. ka BP); (U4) laminated/banded lacustrine deposits characterized by terrigenous deposits from ice‐covered lake periods and episodic events of ice and snow melting (766–752 cm bsf; 12.9 ± 0.29–11.7 ± 0.15 cal. ka BP); and (U5) massive muddy lacustrine deposits (752–0 cm bsf; 11.7 ± 0.15 cal. ka BP–present). The occurrence of U2 to U4 deposits defines the transition from glacial cold (U1) to net warm postglacial conditions (U5). These climate transitions are marked by changes in sediments and the presence of very low sedimentation rate periods, possibly related to the Intra‐Allerød Cold Period and the coldest phase of the Younger Dryas. Our results support the previously proposed timing of the retreat of the Serra da Estrela glaciers ca. 13.8 ± 0.12 cal. ka BP. The robust chronology of Lake Peixão highlights the potential of Iberian pro‐glacial lakes for dating deglaciation processes and will lead to unprecedented decadal‐to‐centennial timescale palaeoclimate reconstructions in this region since the last glacial–interglacial transition.
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Bølling-Allerød 暖期期间发生的三起两栖大西洋世纪级寒冷事件
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
Zicheng Yu;U. Eicher
通讯作者：
U. Eicher
密歇根州上半岛海狸湖岩芯中记录的冰消和湖水位波动历史
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
T. Fisher;R. Whitman
通讯作者：
R. Whitman
伊比利亚西北部及其边缘末次冰消期的气候变化
影响因子：
2.2
作者：
F. Naughton;M. F. S. Goñi;T. Rodrigues;E. Salgueiro;S. Costas;S. Desprat;J. Duprat;E. Michel;L. Rossignol;S. Zaragosi;A. Voelker;F. Abrantes
通讯作者：
F. Abrantes
影响因子：
4
作者：
Ausin, Blanca;Hodell, David A.;Eglinton, Timothy I.
通讯作者：
Eglinton, Timothy I.
葡萄牙埃什特雷拉山脉晚冰期和早全新世植被演替、植被海拔分带和气候变化
影响因子：
1.9
作者：
W. O. Knaap;J. Leeuwen
通讯作者：
J. Leeuwen