大兴安岭月亮湖记录的高分辨率古气候变化数据集（21kaB.P.以来）

月亮湖位于季风-非季风影响的过渡地带，对气候变化的响应更为敏感；总有机碳（TOC）、总氮（TN）含量和全岩有机碳同位素（13Corg）组成是反映湖泊沉积物中有机质含量的最基本的参数，对研究和恢复古气候环境变化具有重要意义。通过月亮湖沉积物中TOC、TN含量及13Corg组成的分析，详细恢复了大兴安岭中段月亮湖21kaB.P.以来各阶段的植被分布、古气候环境的变化特征。末次冰期晚期沉积物中的有机质含量很低，有机质主要以内源水生生物为主，气候相对干冷，湖泊周围陆生植被稀疏；末次冰消期气候环境总体改善的进程中存在冷暖干湿的气候快速变化，大部分有机质来源于汇水盆地中的陆生植物，湖盆周围植被覆盖率较差，导致大量外源有机质的流入；全新世以来沉积物中的有机质含量增加，陆生植被茂盛，此阶段为全新世适宜期，且湖盆周围陆生植被变化不大。

Moon Lake is situated in the transitional zone between monsoon-influenced and non-monsoon-influenced regions, rendering it more sensitive to climate change. Total organic carbon (TOC), total nitrogen (TN) contents and bulk sediment organic carbon isotopic (¹³Corg) composition are the most fundamental parameters reflecting organic matter content in lake sediments, which are of great significance for studying and reconstructing paleoclimatic and paleoenvironmental changes. Through analysis of TOC, TN contents and ¹³Corg composition in Moon Lake sediments, we comprehensively reconstructed the vegetation distribution and characteristics of paleoclimatic and paleoenvironmental changes at each stage since 21 ka B.P. in Moon Lake, central Daxing'an Mountains. During the late Last Glacial Period, the organic matter content in sediments was very low, and most organic matter originated from endogenous aquatic organisms; the climate was relatively dry and cold, with sparse terrestrial vegetation around the lake. During the Last Deglaciation, rapid climate fluctuations between warm-cold and dry-wet conditions occurred amid the overall improvement of climate and environment; most organic matter was derived from terrestrial plants in the catchment basin, and poor vegetation coverage around the lake basin led to the influx of large amounts of exogenous organic matter. Since the Holocene, the organic matter content in sediments has increased, and terrestrial vegetation has thrived. This period corresponds to the Holocene Optimum, with little change in terrestrial vegetation around the lake basin.

搜集汇总

背景与挑战

背景概述

该数据集包含了大兴安岭月亮湖21kaB.P.以来的高分辨率古气候变化记录，通过总有机碳（TOC）、总氮（TN）含量和全岩有机碳同位素（13Corg）组成分析，反映了湖泊沉积物中有机质含量的变化，揭示了末次冰期晚期、末次冰消期和全新世以来的植被分布和古气候环境特征。数据集对研究古气候环境变化具有重要意义，尤其适用于古地理学和地理科学数据领域的研究。