The Input / Evaporation inferred by mineral composition and stable isotope and climatic implications in Serling Co sediment of Tibet, China since last deglacial period

作者：Xinghuan Zhu, Liping Zhu, Junbo Wang, Jianting Ju, Minghui Li, Qiangqiang Kou, Qingfeng Ma · 发表于：Palaeogeography Palaeoclimatology Palaeoecology · 年份：2025 · DOI：10.1016/j.palaeo.2025.113484 · 被引用次数：1 · 研究领域：Geology and Paleoclimatology Research、Paleontology and Stratigraphy of Fossils、Geochemistry and Elemental Analysis

The Tibetan Plateau hosts the world's highest-altitude lake cluster, which constitutes a critical component of regional hydrological cycles and plays a vital role in regulating regional climate and maintaining ecological balance. The lake water balance dominated by the input(Precipitation +glacial meltwater)/evaporation (I/E) reflect regional water cycle changes and climatic changes. This study reconstructs the regional hydroclimate evolution and explored its driving mechanisms over the past 25.1 cal ka BP using high-resolution mineralogical composition (XRD analysis) and authigenic carbonate stable isotope records (δ 13 C carb and δ 18 O carb ) from sediment cores in central Tibetan Plateau's Serling Co. Our findings reveal that Serling Co remained relatively small and shallow under cold-arid conditions throughout the last deglacial period, experiencing multiple climatic fluctuations. During the Early-Mid Holocene, the lake expanded significantly under warm-humid conditions with stable hydrological status, followed by rapid contraction and frequent dry-wet alternations in the Late Holocene. Orbital-scale variations in solar insolation controlling thermal conditions and monsoonal precipitation emerge as primary drivers of climatic changes, while AMOC and ENSO variations induced centennial-millennial scale hydrological fluctuations. Notably under low insolation conditions during the Last Deglacial and Late Holocene periods, the lake exhibited reduced stability and enhanced hyd...