Collaborative Research: Nested GCM/Mesoscale Model Studies of Large, Rapid Holocene and Late-Glacial Climate Changes: Synthesis with the Greenland Ice Core Records

摘要 粤ICP备16014927号-1 地址：9614907 ALLEY，RICHARD 福塞特，PETER Pennsylvania State University新墨西哥州州立大学 本研究计画利用中尺度气候模式结合大气环流模式（GCM），探讨北方半球古气候记录中发现的两次极端快速冷却的原因。这些冷却不能用解释主要冰川事件的相同机制来解释，而这些机制是气候变化发生方式的重要线索。模拟工作将使用最近从格陵兰冰盖项目恢复的古气候记录进行验证。这项研究的结果将增进对气候系统反馈机制的了解，这种机制可能导致北方半球气温迅速急剧变化，全球海平面下降，从而影响到世界各地的人类活动。

ABSTRACT OPP-9614927 OPP-9614907 ALLEY, RICHARD FAWCETT, PETER PENNSYLVANIA STATE UNIVERSITY NEW MEXICO STATE UNIVERSITY This research project uses a mesoscale climate model in conjunction with a General Circulation Model (GCM) to examine the cause of two extremely rapid coolings that have been found in paleoclimate records of the Northern Hemisphere. Those coolings cannot be explained by the same mechanisms that account for the major glacial episodes and represent an important clue to the way that climate change occurs. The modeling effort will be validated using the paleoclimate record recovered recently from the Greenland Ice Sheet Project Two ice cores taken near the summit of the Greenland ice cap. The results of this study will enhance the knowledge of climate system feedback mechanisms that could produce a rapid, dramatic shift in Northern Hemisphere temperatures and a drop in global sealevel that would affect human activities around the world.