Climate and environmental history at Lake Levinson‐Lessing, Taymyr Peninsula, during the last 62 kyr
Climate and environmental history at Lake Levinson‐Lessing, Taymyr Peninsula, during the last 62 kyr
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DOI：
10.1002/jqs.3384
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发表时间：
2021-10
影响因子：
2.3
通讯作者：
M. Lenz;M. M. Lenz-M.;Andrei A. Andreev;S. Scheidt;R. Gromig;E. Lebas;G. Fedorov;S. Krastel;M. Melles;B. Wagner
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文献类型：
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作者：
M. Lenz;M. M. Lenz-M.;Andrei A. Andreev;S. Scheidt;R. Gromig;E. Lebas;G. Fedorov;S. Krastel;M. Melles;B. Wagner
莱文森-莱辛湖（Lake Levinson‐Lessing）的Co 1401岩芯中显示的45.95 m长的沉积物序列，使我们能够重建泰梅尔半岛过去62 kyr的大部分未被探索的环境和气候历史。对岩心进行了多学科分析，包括岩性、粒度、地球化学和花粉分析。代用数据表明，一个相对稳定的、以草本植物为主的环境，在寒冷/潮湿的海洋同位素阶段（MIS）4晚期和MIS 3早期、温和/干燥的MIS 3中期和晚期以及寒冷/干燥的MIS 2之间只有细微的变化。没有明显的气候波动表明莱文森湖-莱辛流域在此期间没有被冰盖覆盖。降水量的变化可能是由于泰梅尔半岛外的欧亚大冰盖的消长，改变了向东的水汽输送和大气环流模式。莱文森湖-莱辛湖的MIS 1与总体温暖和潮湿的条件以及Bølling-Allerød变暖，新仙女木冷却和北半球过渡期间的短期气候波动有关，这表明北大西洋气团的影响。
The 45.95 m‐long sediment succession shown in core Co1401 from Lake Levinson‐Lessing allows the reconstruction of the largely unexplored environmental and climatic history of the Taymyr Peninsula of the past 62 kyr. The core was analysed with a multidisciplinary approach including lithological, granulometric, geochemical and pollen analyses. The proxy data indicate a relatively stable, herb‐dominated environment with only subtle changes between a cold/wet late Marine Isotope Stage (MIS) 4 and early MIS 3, mild/dry middle and late MIS 3 and a cold/dry MIS 2. The absence of pronounced climate fluctuations demonstrates that the Lake Levinson‐Lessing catchment was not covered by an ice sheet during this period. Changes in precipitation were likely caused by waxing and waning of the large Eurasian ice sheets outside of the Taymyr Peninsula, which changed the eastward moisture transport and atmospheric circulation patterns. MIS 1 at Lake Levinson‐Lessing was associated with overall warmer and wetter conditions and short‐term climate fluctuations during the Bølling–Allerød warming, Younger Dryas cooling and Preboreal transition, which indicates the influence of North Atlantic air masses.