新生代关键地质时期亚洲内陆干旱气候的模拟研究

新生代亚洲内陆干旱气候演化及机制属于过去气候变化研究中的前沿和热点。以往研究主要基于地质记录重建，而气候模拟研究较少，亚洲内陆干旱气候演化的动力学机制仍不明确。本项目拟利用通用地球系统模式CESM1.2，开展新生代关键地质时期亚洲内陆干旱气候的数值模拟研究，充分考查多种边界条件（包括地形、海陆分布、大气CO2含量以及两极冰盖）变化对亚洲内陆干旱气候演化的影响。研究新生代亚洲内陆干旱气候分别对不同边界条件变化的响应特征、物理过程和动力学机制，区分不同强迫因子的气候影响，查明多强迫因子的协同作用，并辨识出新生代亚洲内陆干旱气候演化的主导强迫因子。本项目的开展有望从古气候模拟角度在新生代亚洲内陆干旱气候演化的规律及动力学机制方面取得创新性成果，并为深入理解亚洲内陆干旱气候的演化历史提供科学依据。

The evolution and mechanism of the Asian inland aridity during the Cenozoic is a hot topic in paleoclimate research. Previous studies are mainly based on geological record reconstruction, and climate modeling studies are limited. The mechanism of the Asian inland aridity during the Cenozoic is still unclear. This project is expected to use CESM1.2 to simulate the Asian inland climate in the key geological periods of the Cenozoic and examines the effects of different boundary conditions (including topography, land-sea distribution, atmospheric CO2 content and polar ice sheet) on the evolution of the Asian inland climate. This project will study the response characteristics, physical processes and mechanisms of the Asian inland climate to the changes of different boundary conditions, distinguish the climatic effects of different forcing factor, and identify the synergy of multiple forcing factors and the dominant forcing factors of the evolution of Asian inland aridity during the Cenozoic. This project is expected to achieve innovative results in the mechanism of Asian inland aridity from the perspective of paleoclimate modeling and provides a scientific basis for understanding the evolution history of Asian inland aridity.