Collaborative Research: Testing Earth System Models with Paleoenvironmental Observations

摘要ATM-952385 Webb，III，Thompson Brown University 标题：测试地球系统模型与古环境 观察结果（克里思） 该奖项支持USGCRP地球系统历史（ESH）计划下的一个项目。 该奖项的目的是提高模型模拟地球系统巨大变化的能力，并了解系统组成部分之间的相互作用和反馈。 地球的气候系统及其植被、湖泊、湿地和海洋在过去发生了巨大的变化，这些大变化的数据为测试地球系统模型的准确性提供了“地面实况”。 该研究小组将开发一个综合平衡生物圈模型、一个湖泊/大陆水文模型以及将这些模型离线连接到大气环流模型和海洋环流模型的耦合程序。 还将使用一个区域细网格气候模式来研究地形复杂地区的地球系统变化。 有了这些耦合模式，就有可能探索各种潜在的地球系统反馈，包括：a）与北方森林取代苔原或热带萨凡纳取代沙漠有关的大气-生物圈相互作用; B）与湖泊和湿地面积增加或减少有关的大气/陆地-地表-水文相互作用;与北极海冰、北大西洋温盐环流以及沿海和赤道上升流变化有关的大气/海洋/陆地-植被相互作用。 将汇编6000年和21,000年前的全球古植被和湖泊状况数据集，这些数据集将与海洋环流数据和以前的星际数据一起沿着使用，以便与耦合的地球系统模型进行比较。

Abstract ATM-952385 Webb, III, Thompson Brown University Title: Testing Earth System Models with Paleoenvironmental Observations (TEMPO) This award supports a project under the Earth System History (ESH) Program of the USGCRP. The objective of this award is to improve the ability of models to simulate large changes in the earth system and to understand the interactions and feedbacks among components of the system. The earth's climate system with its vegetation, lakes, wetlands, and oceans has changed dramatically in the past, and the data about these large changes provide "ground truth" for testing the accuracy of the earth system models. The research team will develop an integrated equilibrium biosphere model, a lake/continental-hydrology model, and coupling procedures to link these models off-line to atmospheric general circulation models and an ocean general circulation model. A regional fine-mesh climate model will also be used for studying earth system changes in regions of complex topography. With these coupled models, it will be possible to explore a wide variety of potential earth system feedbacks including: a) atmosphere-biosphere interactions associated with boreal forest replacing tundra, or tropical savannah replacing desert; b) atmosphere/land-surface-hydrology interactions associated with increases or decreases in the area extend of lakes and wetlands; atmosphere/ocean/terrestrial- vegetation interactions associated with changes in Arctic sea-ice, the North Atlantic thermohaline circulation, and coastal and equatorial upwelling. Global paleovegetation and lake status data sets will be compiled for 6000 and 21,000 years ago, and these data sets will be used along with data for ocean circulation and from the previous intergalcial to make comparisons with the coupled earth system models.