NOAA/WDS Paleoclimatology - Zhuliuping Cave Geochemical Data from 14700 to 4600 Cal Yr BP

We present two isotopic (δ18O and δ13C) sequences of a twin-stalagmite from Zhuliuping Cave, southwestern China, with 230Th dates from 14.6 to 4.6 ka. The stalagmite δ18O record characterizes orbital- to decadal-scale variability of Asian summer monsoon (ASM) intensity, with the Holocene optimum period (HOP) between 9.8 and 6.8 ka BP which is reinforced by its co-varying δ13C data. The large multi-decadal scale amplitude of the cave δ18O indicates its high sensitivity to climate change. Four centennial-scale weak ASM events during the early Holocene are centered at 11.2, 10.8, 9.1 and 8.2 ka. They can be correlated to cold periods in the northern high latitudes, possibly resulting from rapid dynamics of atmospheric circulation associated with North Atlantic cooling. The 8.2 ka event has an amplitude more than two-thirds that of the Younger Dryas (YD), and is significantly stronger than other cave records in the Asia monsoon region, likely indicating a more severe dry climate condition at the cave site. At the end of the YD event, the δ13C record lags the δ18O record by 300–500 yr, suggesting a multi-centennial slow response of vegetation and soil processes to monsoon enhancement.本研究报道了采自中国西南猪留坪洞的一枚孪生石笋的两套同位素（δ¹⁸O与δ¹³C）序列，其钍-230（²³⁰Th）测年范围为14.6至4.6千年（ka）。该石笋的δ¹⁸O记录刻画了亚洲夏季风（Asian summer monsoon, ASM）强度在轨道尺度至年代际尺度上的变化特征，其中9.8~6.8 ka BP期间的全新世适宜期（Holocene optimum period, HOP）得到了同步变化的δ¹³C数据的佐证。该洞穴δ¹⁸O记录的大幅多年代际振幅显示其对气候变化具有较高敏感性。早全新世时期共存在4次百年尺度的亚洲夏季风弱事件，分别集中于11.2、10.8、9.1和8.2 ka，这些事件可与北半球高纬度的冷期相对应，其成因可能与北大西洋冷却引发的大气环流快速变动有关。8.2 ka事件的振幅超过新仙女木事件（Younger Dryas, YD）的三分之二，且显著强于亚洲季风区其他洞穴记录，这可能指示该洞穴区域当时的干旱气候更为严峻。在新仙女木事件结束阶段，δ¹³C记录较δ¹⁸O记录滞后300~500年，表明植被与土壤过程对季风增强存在长达数百年的缓慢响应。

搜集汇总

背景与挑战

背景概述

该数据集提供了中国西南部竹溜坪洞穴的化学数据，包括δ18O和δ13C同位素序列，时间跨度为14.6至4.6 ka，用于分析亚洲夏季风强度的轨道到十年尺度变化。数据集揭示了全新世最佳期和多个百年尺度弱季风事件，并显示了δ13C记录相对于δ18O的滞后，表明植被和土壤过程对季风增强的缓慢响应，突出了其对气候变化的敏感性。