Collaborative Research: Paleoenvironmental Time Series From Postglacial Lake Basins on Kola Peninsula, Russia

题目：合作研究：俄罗斯科拉半岛冰期后湖泊盆地的古环境时间序列北大西洋地区去冰和全新世气候的剧烈变化是如何传播到欧亚北极地区的，目前尚不清楚。北大西洋洋流最东端北开普流附近的科拉半岛的湖泊和河口记录，为评估冰川后和全新世湖泊、植被和林木线的变化以及推断大气和海洋环流的变化提供了档案。科拉半岛北部现存的岩心提供了至少过去12000年的河口和湖泊记录。初步分析表明，这些沉积物中含有丰富的生物残留物，是确保可靠的放射性碳年表和确定环境变化的理想选择。这个PALE/ARCSS奖项支持从苔原主导的北部海岸到科拉半岛森林中心的样带湖芯。本研究将利用一系列古生态技术，如花粉、硅藻、大化石和沉积物分析，并辅以最近在气孔、chironomid和纤维素稳定同位素分析方面的进展。为了加强岩心的古环境解释，将从湖泊中收集现代沉积物样本，将花粉、气孔、硅藻和chironomid记录与当前的气候、土壤和植被条件进行统计校准。这项研究将提供来自俄罗斯西部北极地区的新的晚冰期和全新世记录，目前在全球古气候时间序列中是空白的。该研究是与俄亥俄州立大学的Steven L. Forman博士合作进行的（ATM-9600126）。

Abstract ATM-9632926 MacDonald, Glen M. University of California, Los Angeles Title: Collaborative Research: Paleoenvironmental Time Series from Postglacial Lake Basins on Kola Peninsula, Russia It is poorly known how dramatic changes in deglacial and Holocene climates in the North Atlantic region propagated into the Eurasian arctic. Lacustrine and estuarine records from the Kola Peninsula, adjacent to the North Cape Current, the eastern-most limb of the North Atlantic current, provide archives to assess postglacial and Holocene variations in lakes, vegetation and tree line and inferred changes in atmospheric and oceanic circulation. Extant cores from northern Kola Peninsula provide estuarine and lacustrine records spanning at least the last 12,000 yrs. Preliminary analyses demonstrate that these sediments are rich in biologic remains, ideal for securing a reliable radiocarbon chronology and determining environmental changes. This PALE/ARCSS award supports lake coring on a transect from the tundra-dominated northern coast to the forested center of Kola Peninsula. This research will utilize an array of paleoecological techniques such as pollen, diatom, macrofossil and sediment analyses, augmented by recent advances in stomate, chironomid and cellulose stable isotope analyses. To strengthen the paleoenvironmental interpretations of the cores, modern sediment samples will be collected from lakes to statistically calibrate pollen, stomate, diatom, and chironomid records with present climatic, edaphic and vegetation conditions. The research will provide new late glacial and Holocene records from the western Russian arctic, currently a void in global paleoclimatic time series. The collaborative research is with Dr. Steven L. Forman at the Ohio State University (ATM-9600126).