Holocene Climate Reconstruction in the Upper Midwest Using Pollen Analogs

ATM-9809848，玛格丽特·戴维斯，玛格丽特·B明尼苏达大学题目：使用花粉类似物重建中西部上地区的全新世气候该奖项支持一个项目，该项目使用现代模拟方法，从化石花粉数据中得出对上五大湖地区全新世气候的定量估计。这一地区存在异常密集的化石花粉图、地表样本和预定居时代的样本。通过将这些数据按湖泊大小、底物和其他变量进行分层，这项研究将能够确定这些因素对气候重建的影响。在年代控制良好的地点将重建连续的气候轨迹，以观察千年和短期气候变化。为了确定从湖泊水位变化模式识别的气候省的边界，将在整个全新世每隔500-1000年为整个地区绘制重建的温度和降水量地图。

Abstract ATM-9809848 Davis, Margaret B. University of Minnesota Title: Holocene Climate Reconstruction in the Upper Midwest Using Pollen Analogs This award supports a project to use the modern analog method to derive quantitative estimates of Holocene climate in the Upper Great Lakes region from fossil pollen data. An unusually dense grid of fossil pollen diagrams, surface samples, and samples of presettlement age exist in this region. By stratifying these data by lake size, substrate, and other variables, this study will be able to determine the influence of these factors on climate reconstructions. Continuous climate trajectories will be reconstructed at sites with good dating control to observe millennial and short-term climate variation. To define the boundaries of climatic provinces recognized from patterns of change in lake levels, maps of reconstructed temperature and precipitation will be prepared for the entire area at 500-1000 year intervals throughout the Holocene.