基于古湖泊数据库的晚第四纪湖泊水量空间格局分析及对古气候模拟验证研究

The research on the Lake Status Data Base in the Quaternary science and the integration of the spatial pattern of lake-status, is one of the most effective tools to validate the palaeoclimate modelling simulations. However， the early-version of the Late Quaternary Chinese Lake Status Data Base (CLSDB V1.0) was lack of data (only 42 sites involved), and the adequate spatial analysis and quantitative analysis. Therefore, this project aims to re-construct the Late Quaternary Chinese Lake Status Data Base (CLSDB V2.0) using large sources and archives of lake geological data published in recent decade. It is estimated that over 80-90 lake sites would be involved in the CLSDB V2.0, which will provide the benchmark of continental east Asia palaeoclimate and palaeoenvironment dataset in the late Quaternary. Meanwhile, the spatial data analysis from the CLSDB V2.0 and the quantitative reconstruction of the precipitation from multi-lake sites will help to make comparison study of data-modelling simulations in continental China, and to validate the state-of-art palaeoclimate modelling simulations. This project will improve the research on the Lake Status Data Base, and better serve for the dynamic palaeoclimatology.

古湖泊数据库的建设以及古湖泊水量空间变化的集成研究，是第四纪研究领域对古气候模拟进行验证的有效手段之一。早期的中国晚第四纪古湖泊数据库由于版本偏老，数据空间分析与定量研究不够，导致对古气候模拟验证能力不足。本项研究拟立足于中国近年来丰富的湖泊第四纪地质证据，选择覆盖我国不同气候区的湖泊点80-90个，重建空间系统化的中国晚第四纪古湖泊数据库，用来系统分析中国不同区域古湖泊水量与古环境演变过程，作为对比、验证和评价东亚季风区古气候模拟的基准；同时针对我国空间古湖泊数据与古气候模拟结合的薄弱环节，开展古湖泊数据库的空间数据分析，并定量重建中国多个湖泊流域不同特征时期古降水量，尝试恢复不同特征时期古气候降水的空间分布格局，以提供东亚区域大陆空间尺度上的基础性资料，提升古湖泊数据库验证古气候模拟的能力，为更好开展与古大气环流相关的古气候动力学机制研究服务。