Collaborative Research: Growth of the Tibetan Plateau and Eastern Asia Climate: Clues to Understanding the Hydrological Cycle

合作研究：青藏高原的增长和东亚气候：了解水文循环的线索

• 批准号: 1211397
• 负责人: Warren Beck
• 金额: $ 22.09万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1211397&HistoricalAwards=false
• 关键词: Collaborative; Research; Growth; Tibetan; Plateau

For fifty years, the Tibetan Plateau has been recognized as the largest topographic feature that perturbs atmospheric circulation. It serves as an ideal field laboratory for understanding the geodynamic processes that build high terrain. Accordingly, the growth of the plateau should have altered atmospheric circulation and therefore written an evolving paleoclimatic signature not only on eastern Asian regional climates, but on global climate as well. Despite many recent studies, we still do not know precisely when the Tibetan Plateau reached its current dimensions and how it perturbs atmospheric circulation. This project brings together geodynamicists, atmospheric scientists, and paleoclimatologists in a multidisciplinary study of the when and the how.One of the major goals of the project is to quantify the extent to which Tibet has grown by crustal thickening, by thrust faulting and folding, by flow within the crust that redistributes material there, or by replacement of cold mantle lithosphere with hotter material (all in a state of isostatic equilibrium). Such quantification will take big steps toward the understanding of how high plateaus are built and how continental lithosphere deforms, topics at the forefront of geodynamics. Determining how Tibet has grown will require determining when crustal shortening and thickening occurred, using basic field methods and modern laboratory techniques, and quantifying paleoaltitudes with new isotopic tools. Applying such paleoaltimetric techniques, however, requires an understanding not only of how the atmosphere transports isotopes, but how the evolving high terrain affected surface temperatures at times in the past.

五十年来，藏族高原一直被认为是大气循环的最大地形特征。 它是理解理想的现场实验室，用于理解建立高地形的地球动力学过程。 因此，高原的生长应该改变大气循环，因此不仅在东亚地区气候下，而且在全球气候下写了不断发展的古气候签名。 尽管最近进行了许多研究，但我们仍然不确定何时藏族高原达到其当前尺寸以及它如何消除大气循环。 该项目汇集了地球动力学家，大气科学家和古气候学家在对何时和方式的多学科研究中。平衡）。这种量化将迈出重要的步骤，以了解高原的建造高度以及大陆岩石圈的变形，主题是地球动力学的最前沿。确定西藏的生长将如何使用基本的现场方法和现代实验室技术确定何时发生地壳缩短和增厚，并使用新的同位素工具来量化古质量。但是，应用这种古占学技术不仅需要了解大气如何运输同位素，而且还需要了解过去如何影响高地形的表面温度。