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

摘要ATM-9417160 Peteet，Dorothy Lamont-Doherty地球观测台标题：美国高分辨率植被和气候记录 东南部;冰川至全新世变化 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、幅度和地理范围，加上冰和海洋记录，将有助于将中纬度和高纬度气候状况联系起来。 对各种古气候记录的年代学控制的改进使人们把注意力集中在气候变化的速度上。 这一建议将导致高分辨率的古植被记录从弗吉尼亚州，北卡罗来纳州和格鲁吉亚，包括从大约18,000到9000年BP的时间间隔。 这些记录与现有记录相结合，将揭示整个地区的植被是否单向反应。 将确定气候强迫，并利用大气环流模式模拟评估其影响东南部地区的潜力。 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面温度（SST）变化的敏感性。 数据-模型比较将指出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.