Late- and post-glacial vegetation and climate history of the south-western Taymyr Peninsula, central Siberia, as revealed by pollen analysis of a core from Lake Lama
Late- and post-glacial vegetation and climate history of the south-western Taymyr Peninsula, central Siberia, as revealed by pollen analysis of a core from Lake Lama
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通过对拉马湖核心的花粉分析揭示了西伯利亚中部泰梅尔半岛西南部的晚冰期和冰期后植被和气候历史
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Melles
中科院分区：
文献类型：
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作者：
J. Hahne;M. Melles
在西伯利亚中部的泰米尔半岛和塞维纳亚地岛群岛，德国/俄罗斯联合开展了一个多学科研究项目，重点研究晚第四纪气候和环境的历史。在这个项目的范围内，孢粉学研究是在位于研究区域西南部的Lama湖的10.8米岩心上进行的。岩心没有到达湖泊沉积物的底部，揭示了过去17000年的植被和气候历史，并证明该地区在那段时间没有冰川。与北半球其他地区一样，更新世/全新世转变的特征是在Bølling、Allerød和Preboreal期间温度升高，在更老（后Bølling）和新仙女木事件期间中断。喇玛湖全新世气候适宜期可能发生在北方寒带时期，当时发育了茂密的落叶松林。大西洋时期的特点是温暖的气候有利于落叶松云杉林的形成，尽管也有气候恶化的记录。在亚北纬时期，云杉的重要性有所波动，在此基础上提出了两个冷期，中间有一个暖期。自公元前3000年以来，气候变得相当凉爽，森林退化。在过去的1000年里，不利的气候条件导致了喇嘛湖地区森林苔原和广泛的苔原群落的发展。
On the Taymyr Peninsula and Severnaya Zemlya Archipelago, Central Siberia, a joint German/Russian multidisciplinary research project focuses on the Late Quaternary history of climate and environment. Within the scope of this project, palynological studies were carried out on a 10.8-m core from Lama Lake, situated in the south-west of the research area. The core, which did not reach the base of the lacustrine sediments, reveals the vegetation and climate history of the last 17 000 years and demonstrates that this area was not glaciated during that time. The Pleistocene/Holocene transition is, as elsewhere in the northern hemisphere, characterized by increased temperatures during the Bølling, Allerød and Preboreal with interruptions during the Older (post-Bølling) and Younger Dryas events. The Holocene climate optimum at Lama Lake probably occurred within the Boreal period, when dense larch forests developed. The Atlantic period was characterized by warm conditions that favoured the establishment of larch-spruce forests, though a climatic deterioration is also recorded. During the Subboreal, spruce fluctuated in importance, on the basis of which it is suggested that there were two cool periods with an intervening warm period. Since 3000 B.P., the climate has become considerably cooler and forests have degenerated. During the last 1000 years, unfavourable climate conditions have resulted in a forest tundra and widespread tundra communities developing in the Lama Lake region.