Evolution of Atmospheric Circulation Patterns over Continental Interior Asia during the Past 1.4 Ma from Millennial-Scale Carbonate-Based Proxy Records from Lake Hovsgol, Mongolia

该奖项支持蒙古西北部霍夫斯戈尔湖千年尺度气候记录的发展。该湖位于亚洲内陆的亚极急流的夏季路径上，控制着水汽的西风输送进入该地区。这项研究的目的是促进对北半球大尺度大气环流模式的理解，并记录间冰期期间经向热梯度的变化。具体地说，研究人员将检查从该湖中发现的140万年前的湖泊沉积岩芯，覆盖了中更新世的过渡。这一转变的重要性在于轨道可变性从一个由倾角(4万年轨道周期)主导的系统转变为一个由偏心率(10万年轨道周期)主导的系统。这一高度跨学科和国际化的研究项目将帮助支持硕士研究生，并支持南卡罗来纳大学、俄罗斯科学院西伯利亚分院以及日本和韩国的几个研究机构和大学之间的国际伙伴关系。

This award supports the development of millennial scale climate records from Lake Hovsgol in Northwest Mongolia. The Lake is located along the present summer pathway of the subpolar jet stream over interior Asia that controls the westerly transport of moisture into the region. The goals of the research are to advance the understanding of large-scale atmospheric circulation patterns in the Northern Hemisphere and document changes in meridional heat gradient during interglacials. Specifically, the researchers will examine a 1.4 million year lacustrine sediment core recovered from the Lake and covering the Mid-Pleistocene Transition. The importance of this Transition is the apparent change in orbital variability from a system dominated by obliquity (40,000-year orbital cycles) to one dominated by eccentricity (100,000-year orbital cycles). This highly interdisciplinary and international research project will help support a Master's level graduate student and support international partnerships among the University of South Carolina, the Siberian Branch of Russian Academy of Sciences, and several research institutions and universities in Japan and South Korea.