Bridging Timescales of Tibetan Plateau Environmental Change: An Integration of Earth System Modeling with Modern and Paleo- environmental Proxies

弥合青藏高原环境变化的时间尺度：地球系统建模与现代和古环境代理的整合

• 批准号: 202948994
• 负责人: Professor Dr. Todd Alan Ehlers
• 金额: --
• 依托单位: School of Geographical and Earth Sciences
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/202948994?language=en
• 关键词: Bridging; Timescales; Tibetan; Plateau; Environmental

The Tibetan Plateau is the largest orogenic plateau on Earth and formed in response to continental collision over the last ~50 Million years. The formation of this high-elevation plateau surface is invoked for changes in global and regional climate, as well as in ocean chemistry. Despite their significance, the processes responsible for Tibetan Plateau formation and the evolution of global and regional climate during its formation are poorly resolved. In this proposal we build upon our previous related work on the Andean Plateau. Our focus is to quantify how global and regional climate have responded to Tibetan Plateau surface uplift over timescales ranging from millenial (e.g. last glacial maximum) to geologic (~50 Ma). More specifically, we will test the hypothesis that if Indo-Asian collision, Cenozoic plateau surface uplift, and glaciations are responsible for climate change, then appropriately parameterized paleoclimate simulations of these processes should predict the observed variability in Tibetan proxy data (e.g. δ18O in soil carbonates, lacustrine climate archives), and quantify the paleoclimate and paleoelevation history of the plateau over different time scales. We will test this hypothesis through an integration of global and regional paleoclimate models with paleoclimate proxies. These experiments will bridge spatial and temporal timescales of environmental change over the plateau thereby forming a baseline for understanding modern and potential future climate variability over the plateau.

藏族高原是地球上最大的造口高原，在过去的大约5000万年中响应连续碰撞而形成。为了改变全球和区域气候以及海洋化学的变化，调用了这种高海拔高原表面的形成。尽管具有重要意义，但造成藏族高原形成的过程以及在其形成过程中全球和区域气候的演变的解决方案很差。在此提案中，我们基于以前在安第斯高原的相关工作。我们的重点是量化全球和区域气候如何响应藏族高原表面隆起，从千禧年（例如最后一次冰川最大值）到地质学（〜50 MA）的时间标准。更具体地说，我们将检验以下假设：如果印度 - 亚洲碰撞，新生代高原表面隆起和冰川造成气候变化，那么对这些过程的适当参数化的古气候模拟应预测藏族较含有的葡萄晶和量化量的古老档案，并预测藏族的可观察到的可变性（例如高原在不同的时间尺度上。我们将通过将全球和区域古气候模型与古气候代理的整合整合来检验这一假设。这些实验将弥合高原上环境变化的空间和临时时间尺度，从而形成了理解高原上现代和潜在的未来气候变化的基准。