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A multi-proxy reconstruction of climate during the late-Pleistocene to early Holocene transition in the northeastern, USA
Quaternary Research ( IF 2.3 ) Pub Date : 2021-03-12 , DOI: 10.1017/qua.2020.127
Laurie D. Grigg , Kevin J. Engle , Alison J. Smith , Bryan N. Shuman , Maximilian B. Mandl

A multiproxy record from Twin Ponds, VT, is used to reconstruct climatic variability during the late Pleistocene to early Holocene transition. Pollen, ostracodes, δ18O, and lithologic records from 13.5 to 9.0 cal ka BP are presented. Pollen- and ostracode-inferred climatic reconstructions are based on individual species’ environmental preferences and the modern analog technique. Principal components analysis of all proxies highlights the overall warming trend and centennial-scale climatic variability. During the Younger Dryas cooling event (YD), multiple proxies show evidence for cold winter conditions and increasing seasonality after 12.5 cal ka BP. The early Holocene shows an initial phase of rapid warming with a brief cold interval at 11.5 cal ka BP, followed by a more gradual warming; a cool, wet period from 11.2 to 10.8 cal ka BP; and cool, dry conditions from 10.8 to 10.2 cal ka BP. The record ends with steady warming and increasing moisture. Post-YD climatic variability has been observed at other sites in the northeastern United States and points to continued instability in the North Atlantic during the final phases of deglaciation.

中文翻译:

美国东北部晚更新世至全新世早期过渡期气候的多代理重建

来自佛蒙特州 Twin Ponds 的多代理记录用于重建晚更新世至全新世早期过渡期间的气候变化。花粉、介形虫、δ18O 和从 13.5 到 9.0 cal ka BP 的岩性记录。花粉和 ostracode 推断的气候重建基于个体物种的环境偏好和现代模拟技术。所有代理的主成分分析突出了整体变暖趋势和百年尺度的气候变化。在新仙女木降温事件 (YD) 期间,多个代理显示了寒冷冬季条件和 12.5 cal ka BP 后季节性增加的证据。全新世早期显示出快速变暖的初始阶段,在 11.5 cal ka BP 有短暂的冷间隔,随后是更缓慢的变暖;从 11.2 到 10.8 cal ka BP 的凉爽潮湿时期;以及从 10.8 到 10.2 cal ka BP 的凉爽干燥条件。记录以稳定的变暖和增加的水分结束。
更新日期:2021-03-12
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