Quaternary Environments and Climate Change in the Eastern Canadian Arctic, Constructed from Sediment Cores

该奖项是为了支持苍白活动的一个因素(北极湖泊和河口的古气候)。研究的重点是加拿大北极东部的一个湖泊取心计划，目标是恢复过去10到15 000年来环境变化的连续记录。巴芬岛位于一个关键位置，对气候数据的分析表明，该地区是环北极气候系统的风向标。该项目将根据岩心下方花粉和硅藻组合的变化、稳定的同位素比率和岩心沉积物的物理特征来重建过去的气候。这些湖泊将位于北部/S温度样带的战略位置，并横跨东西海洋/大陆气候梯度。来自这些湖泊的岩芯将使人们能够审查与气候变化有关的问题，包括区域冰川历史(最后一次大陆冰推进的时间和程度以及冰川消融的模式)、海平面变化(冰后浮现和最近的淹没)，以及全新世晚期环状和山脉冰川的重新发展(新冰川作用)。采样的密度将与苍白的目标相称，即根据不同湖盆内的积累率，从十年到几个世纪的分辨率。

This award is in support of one element of the PALE activity (Paleoclimates from Arctic Lakes and Estuaries). Research is focused on a lake coring program in the Eastern Canadian Arctic with the goal of recovering continuous records of environmental change for the last 10 to 15 thousand years. Baffin Island lies in a key location and analyses of climatic data indicate that this region serves as a bellwether for the circum-arctic climate system. This project will reconstruct past climates from down- core changes in the pollen and diatom assemblages, stable isotopic ratios and physical characteristic of the sediment in cores. The lakes will be strategically located along a N/S temperature transect, and across the E/W marine/continental climate gradient. Cores form these lakes will allow examination of questions related to climate change, including regional glacial history (timing and extent of the last continental ice advance and the pattern of deglaciation), sea level change (both postglacial emergence and the more recent submergence), and renewed development of cirque and mountain glaciers in the late Holocene (Neoglaciation). Sampling will be undertaken with a density commensurate with PALE objectives, i.e. decadal to centuries resolution depending on the accumulation rates within the different lake basins.