High-Resolution Vegetation and Climate Records from the U.S. Southeast: Glacial to Holocene Changes

ATM-9417160多萝西·拉蒙特-多尔蒂地球观测站标题：来自美国东南部的高分辨率植被和气候记录从冰川到全新世的变化该奖项支持一个旨在建立美国东南部植被变化模式的项目。植被响应的时间、规模和地理范围，加上冰层和海洋记录，将有助于将中纬度和高纬度气候制度联系起来。改进了对各种古气候记录的时间控制，将注意力集中在气候可能变化的速度上。这一提议将导致弗吉尼亚州、北卡罗来纳州和佐治亚州的高分辨率古植被记录，包括大约18,000到9000年BP的间隔。这些记录与现有的记录相结合，将揭示整个地区的植被是否具有单向反应。将通过大气环流模式(GCM)模拟来识别气候强迫，并评估它们对东南部地区的影响潜力。GCM模拟将评估该模型对太阳辐射、冰盖范围和高度以及北大西洋海洋表面温度(SST)变化的敏感性。数据模型的比较将指明观测和模型研究的未来方向。

Abstract ATM-9417160 Peteet, Dorothy Lamont-Doherty Earth Observatory Title: High-Resolution Vegetation and Climate Records from the U.S. Southeast; Glacial to Holocene Changes This award supports a project designed to establish the patterns of vegetation change across the U.S. southeast. The timing, magnitude and geographical extent of the vegetation response, in conjunction with ice and ocean records, will help link mid-latitude and high- latitude climate regimes. Improved chronological control on a variety of paleoclimate records has focused attention on the rapidity with which climate may change. This proposal will result in high-resolution paleovegetation records from Virginia, North Carolina and Georgia, encompassing an interval from approximately 18,000 to 9000 yrs BP. These records, combined with those existing, will reveal if vegetation responds unidirectionally across the region. Climate forcings will be identified and their potential to influence the southeastern region will be evaluated with general circulation model (GCM) simulations. The GCM simulations will evaluate the model's sensitivity to variations in solar insolation, ice sheet extent and height, and sea surface temperatures (SSTs) in the North Atlantic Ocean. Data-model comparisons will point to future directions of observational and model research.