高校地质学报2026，Vol.32Issue(2)：143-151,9.DOI:10.16108/j.issn1006-7493.2025026
末次冰消期中国南方石笋氧同位素记录与区域降水变化:基于气候模式与重建资料的对比
Last Deglaciation Stalagmite δ18Oc and Regional Precipitation Change in Southern China:Climate Model-Reconstrution Data Comparisons
摘要
Abstract
The stalagmite δ18Oc records from southern China serve as a crucial paleoclimate archive for reconstructing orbital-and millennial-scale variations of the Asian monsoon system.Nevertheless,the precise linkage between these δ18Oc signals and regional precipitation remains debated,posing challenges for both the climatic interpretation of δ18Oc variations and investigations of driving mechanisms of monsoon variations.This study synthesizes published stalagmite δ18Oc records(21-11 ka B.P.)from southern China with HadCM3B model simulations to examine the δ18Oc-precipitation relationship during the last deglaciation.Our analysis reveals distinct scale-dependent relationships:on orbital timescales,the δ18Oc variations reliably track long-term changes in summer precipitation,while millennial-scale δ18Oc fluctuations primarily reflect variations in annual precipitation.The transition from glacial to interglacial conditions is marked by progressively depleted δ18Oc values,corresponding to increasing summer rainfall.In contrast,during abrupt climate events such as YD and HS-1,enriched δ18Oc values coincide with enhanced annual precipitation.Through comparative analysis of δ18Op anomalies with the precipitation-weight and stalagmite δ18Oc anomalies,we demonstrate that while the aforementioned relationships exist across different timescales,stalagmite δ18Oc cannot be unambiguously interpreted as a direct proxy for either summer or annual precipitation amounts.关键词
中国南方/石笋δ18Oc/气候模式/降水δ18OpKey words
Southern China/stalagmite δ18Oc/climate model/precipitation δ18Op分类
天文与地球科学引用本文复制引用
贾瑞赟,邵晓华,张晓..末次冰消期中国南方石笋氧同位素记录与区域降水变化:基于气候模式与重建资料的对比[J].高校地质学报,2026,32(2):143-151,9.基金项目
国家自然科学基金项目(42172205)资助 （42172205）
