赛里木湖SLM13-2-1孔多指标记录的气候变化数据集（过去4000年）

中亚东部水文气候变化对中纬大气环流非常敏感。为了查明该地区水文气候的长期变化及其与大气环流的关系，文章利用位于中天山深水湖泊——赛里木湖钻孔岩芯，在137Cs、210Pb和AMS14C定年基础上，对湖泊岩芯有机碳、有机氮、碳/氮比、碳酸盐含量和粒度等多指标进行了分析，重建了晚全新世以来该地区水文气候变化历史。结果显示，晚全新世以来共发生了4次降水显著增加时期(4000~3780、3590~3210、2800~2160和890~280 cal a BP)和1次降水微弱增加时期(1700~1370 cal a BP)，这与中亚东部地区已有的降水/湿度记录相吻合，表明晚全新世以来该地区具有相似的水文气候变化模式。太阳活动减弱以及整个环北大西洋地区大气环流南移，特别是中纬西风主要路径的南移，可能是中亚东部地区晚全新世水文气候变化的最主要原因。此外，赛里木湖研究结果还揭示了该地区最近100年降水显著增加，但中亚地区未来水文气候如何变化仍需更多不同载体的深入研究。
数据实体包括：
1) 赛里木湖SLM13-2-1孔多指标记录的气候变化数据

Hydrological and climatic changes in eastern Central Asia are highly sensitive to mid-latitude atmospheric circulation. To clarify the long-term variations of hydroclimate in this region and their relationships with atmospheric circulation, this study utilized drill cores from Sayram Lake, a deep-water lake in the central Tianshan Mountains. Based on 137Cs, 210Pb and AMS 14C dating, multiple proxies including organic carbon, organic nitrogen, C/N ratio, carbonate content and grain size of the lake cores were analyzed, and the hydroclimatic change history of this region since the Late Holocene was reconstructed. The results show that four periods of significant precipitation increase (4000–3780, 3590–3210, 2800–2160 and 890–280 cal a BP) and one period of slight precipitation increase (1700–1370 cal a BP) have occurred since the Late Holocene. These findings are consistent with existing precipitation/humidity records in eastern Central Asia, indicating that the region has exhibited similar hydroclimatic change patterns since the Late Holocene. Reduced solar activity and the southward shift of atmospheric circulation across the entire circum-North Atlantic region, especially the southward shift of the main path of the mid-latitude westerlies, may be the primary causes of hydroclimatic changes in eastern Central Asia since the Late Holocene. In addition, the results from Sayram Lake also reveal a significant increase in precipitation in this region over the past century, but more in-depth studies using different archives are required to clarify the future hydroclimatic changes in Central Asia. The dataset includes: 1) Climate change data with multiple proxies from core SLM13-2-1 of Sayram Lake

搜集汇总

背景与挑战

背景概述

该数据集包含赛里木湖SLM13-2-1孔钻孔岩芯的多指标分析数据，用于重建过去4000年的水文气候变化历史。数据涵盖了有机碳、有机氮、碳/氮比、碳酸盐含量和粒度等指标，揭示了该地区晚全新世以来的降水变化模式及其与大气环流的关系。