The chronology of palaeoenvironmental changes during the Last Glacial-Holocene transition: towards an event stratigraphy for the British Isles
The chronology of palaeoenvironmental changes during the Last Glacial-Holocene transition: towards an event stratigraphy for the British Isles
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末次冰期-全新世过渡期间古环境变化的年表：走向不列颠群岛的事件地层学
DOI：
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发表时间：
1999
影响因子：
2.7
通讯作者：
M. Walker
中科院分区：
文献类型：
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作者：
J. Lowe;H. H. Birks;S. J. Brooks;G. Coope;D. Harkness;F. E. Mayle;C. Sheldrick;C. Turney;M. Walker
TIGGER IIb项目的总体目标是增加我们对末次冰期-全新世过渡期间生态系统对气候变化的响应方式和速率的理解。TIGGER项目的主要目标是：（1）弥补传统放射性碳测年的局限性，以提供更可靠的事件年表;（2）提高古气候重建的分辨率和精度;（3）扩大定点古生态调查的范围。在本文中，我们专注于这些战略的第一个，并描述了在制定一个更连贯的时间尺度的晚冰期气候历史的进展。这是通过使用一些独立的方法，包括校准AMS放射性碳年代从陆生植物宏化石，MCR估计夏季温度的基础上鞘翅目记录，稳定的碳同位素比值分析陆生植物宏化石和灰岩年代学。继Björck et al.的1998年的建议，我们整合新的结果，构建一个临时的事件地层的末次冰期-全新世过渡在不列颠群岛，这是基于一系列的功能，被认为是时间平行的。这种方法被认为是提供了一个更连贯的框架，直接比较的古环境证据从英国从其他地方。
The overall aim of the TIGGER IIb project is to increase our understanding of the manner and rates by which ecosystems responded to climate changes during the Last Glacial-Holocene transition. Success in this venture requires better constrained palaeoenvironmental reconstructions than have been achieved thus far, and the TIGGER project focused, in particular, on three main aims: (1) off-setting the limitations of conventional radiocarbon dating, in order to provide a more secure chronology of events; (2) increasing the resolution and precision of palaeoclimatic reconstructions; (3) widening the scope of site-specific palaeoecological investigations. In this paper we focus on the first of these strategies, and describe the progress made in developing a more coherent timescale for the climate history of the Lateglacial period. This has been achieved by using a number of independent methods, including calibration of AMS radiocarbon dates obtained from terrestrial plant macrofossils, MCR estimates of summer temperatures based on coleopteran records, analysis of stable carbon isotope ratios in terrestrial plant macrofossils and tephrochronology. Following Björck et al.'s 1998 recommendations, we integrate the new results to construct a provisional event stratigraphy for the Last Glacial-Holocene transition in the British Isles, which is based on a sequence of features that are believed to be time-parallel. This approach is considered to provide a more coherent framework for direct comparison of the palaeoenvironmental evidence from Britain with that from elsewhere.