Lakes and climate of central Eurasia: Ostracod-based reconstructions of limnology and climate of the last 50,000 years in the Lake Baikal region

在气候迅速变暖的今天，对过去气候变化及其对环境和人口影响的研究变得越来越重要。过去5万年对欧亚大陆特别重要，因为这段时间见证了许多不同持续时间和规模的极端气候事件，以及解剖学上的现代人类从近东到西伯利亚到北极和太平洋海岸的扩散。这就对这些早期现代人的生活条件及其对短期和长期气候变化的反应提出了具有挑战性的问题。贝加尔湖地区（LBR）以其在湖泊沉积物中储存的长期花粉记录和丰富的考古数据而闻名，是研究旧石器时代早期以来气候变化和人类与环境相互作用的理想场所。该项目的目的是利用一套介形虫和稳定同位素分析，获得LBR百年分辨率的第一个可靠的气候记录，这些分析适用于奥查尔湖（西斯贝加尔湖）和科托克尔湖（外贝加尔湖）过去50，000年的沉积物岩心。这些基于介形虫的区域气候记录将有助于克服基于花粉的重建方法的限制，并解决量化季节性气候变化的现有争议。

Studies of past climate change and its impacts on the environment and population are becoming increasingly important today, during a period of rapid climate warming. The last 50,000 years are of particular importance for Eurasia, as this interval has witnessed many extreme climatic events of different duration and magnitude and the dispersal of anatomically modern humans from the Near East throughout Siberia to the Arctic and Pacific coasts. This raises challenging questions about the living conditions of these early modern humans and their responses to short- and long-term climate changes. The Lake Baikal Region (LBR), known for its long pollen records stored in lake sediments and a wealth of archaeological data, is ideal for studying climate change and human-environment interactions since the early Upper Paleolithic. This project aims to obtain the first robustly-dated climate records with centennial resolution for the LBR using a set of ostracod and stable isotope analyses applied to sediment cores from Lake Ochaul (Cis-Baikal) and Lake Kotokel (Trans-Baikal) spanning the last 50,000 years. These ostracod-based regional climate records will help overcome methodological constraints of pollen-based reconstructions and resolve existing controversies in quantifying seasonal climate changes.