East Asian Summer Monsoon CIS-8 event and its sub-cycle features recorded by precisely-dated high-resolution stalagmite from Xianyun Cave,western Fujian Province,China

doi:10.7605/gdlxb.2025.057

Journal of Palaeogeography（Chinese Edition） ›› 2025, Vol. 27 ›› Issue (5): 1302-1313. doi: 10.7605/gdlxb.2025.057

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East Asian Summer Monsoon CIS-8 event and its sub-cycle features recorded by precisely-dated high-resolution stalagmite from Xianyun Cave,western Fujian Province,China

LIU Xing¹^,²(), QIU Wanyin¹^,², DONG Wenyu¹^,², LI Yue¹^,², CAI Binggui¹^,², JIANG Xiuyang¹^,²()

1 Fujian Key Laboratory of Subtropical Resources and Environment, Fuzhou 350007, China
2 School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China

Received:2024-12-03 Revised:2025-01-15 Online:2025-10-01 Published:2025-09-30
Contact: JIANG Xiuyang,born in 1981,professor and doctoral supervisor in the School of Geography Science,Fujian Normal University,is mainly engaged in karst process and paleoclimate reconstruction. E-mail: xyjiang@fjnu.edu.cn.
About author:
LIU Xing,born in 2000,master degree candidate of Fujian Normal University,is mainly engaged in stalagmite paleoclimatic research. E-mail: qsx20231058@student.fjnu.edu.cn.
Supported by:
National Natural Science Foundation of China(42377440)

闽西仙云洞高分辨率石笋记录的东亚夏季风CIS-8事件及亚旋回特征^*

刘行¹^,²(), 邱万银¹^,², 董文玉¹^,², 李月¹^,², 蔡炳贵¹^,², 姜修洋¹^,²()

1 福建省亚热带资源与环境重点实验室, 福建福州 350007
2 福建师范大学地理科学学院, 福建福州 350007

通讯作者: 姜修洋,男,1981年生,福建师范大学地理科学学院教授、博士生导师,主要从事岩溶过程与古气候重建。E-mail: xyjiang@fjnu.edu.cn。
作者简介:
刘行,男,2000年生,福建师范大学硕士研究生,主要从事石笋古气候研究。E-mail: qsx20231058@student.fjnu.edu.cn。
基金资助:
*国家自然科学基金项目(42377440)

Abstract

Abstract:

The Greenland Interstadial 8(GIS-8)event during Marine Isotope Stage 3(MIS3)is characterized by significant warming at northern high latitudes. However,relatively few high-resolution geological records have been used to reveal its detailed structure and global response. In this study,nine high-precision ²³⁰Th ages and 442 oxygen isotope(δ¹⁸O)data were measured from a stalagmite(XY2-10) collected from Xianyun Cave in Fujian Province. These data enable us to reconstruct the evolution of the East Asian Summer Monsoon(EASM)intensity with an average temporal resolution of 5 years over the period of 38.20-36.10ka B.P.(Before Present,“Present”refers to 1950 AD),which covers the Chinese Interstadial 8(CIS-8)event. The δ¹⁸O time series exhibit a stable negative characteristic during the CIS-8 period,consistent with the trends observed in δ¹⁸O records from other stalagmites in the Chinese monsoon region,such as those from Hulu Cave,Yongxing Cave,and Xiaobailong Cave. However,the strengthening trend in summer monsoon intensity recorded by the stalagmite in Xianyun Cave during CIS-8 contrasts with the cooling trend evident in the Greenland ice core δ¹⁸O record. The analysis suggests that during CIS-8,enhanced cooling in Antarctica strengthened the Mascarene High and the transequatorial flow in the Southern Hemisphere,resulting in an overall stronger EASM in southern China, as reflected in the stalagmite δ¹⁸O records. Our sub-decadal resolution record also identifies 21 centennial- to interdecadal-scale summer monsoon enhancement events within the CIS-8 interval. These events correlate well with corresponding events in the Greenland NEEM(Northern Greenland Eemian Ice Drilling)ice-core δ¹⁸O record and the core albedo record from the Arabian Sea Basin. This correlation indicates that the EASM enhancement(weakening),warming(cooling)of northern high latitudes,and northward(southward)shift of the Intertropical Convergence Zone(ITCZ)are strongly linked on centennial- to interdecadal-scales. These connections are likely driven by rapid air-sea coupling mechanism,which is influenced by changes in the Atlantic Meridional Overturning Circulation(AMOC) in the North Atlantic.

Key words: Chinese Interstadial 8 event, stalagmite, East Asian summer monsoon, Xianyun Cave of Fujian Province, sub-cycles

摘要：

基于福建仙云洞石笋(XY2-10)的9个高精度²³⁰Th年龄和442个氧同位素数据,重建了38.20—36.10ka B.P.平均分辨率达5 yr的东亚夏季风(East Asian Summer Monsoon,EASM)强度演变历史。福建仙云洞石笋 δ¹⁸O 值在CIS-8(Chinese Interstadial 8)时期整体呈现出稳定的偏负特征,与同一时期中国季风区内葫芦洞、永兴洞、小白龙洞石笋 δ¹⁸O 记录趋势较为一致,但该石笋 δ¹⁸O 记录的夏季风强度在CIS-8期间整体偏强的趋势,与格陵兰冰芯 δ¹⁸O 记录的降温趋势不同。分析表明,在CIS-8事件期间,南极变冷,其通过增强南半球马斯克林高压(Mascarene High,MH)和越赤道气流,使中国南方地区石笋 δ¹⁸O 记录的EASM整体保持较强态势。此外,仙云洞石笋 δ¹⁸O 记录还揭示了CIS-8事件内部存在21次百年至十年际尺度的夏季风增强事件,这与格陵兰NEEM(Northern Greenland Eemian Ice Drilling)冰芯 δ¹⁸O 记录、阿拉伯海海盆岩心反照率记录的亚旋回事件相对应,表明EASM增强(减弱)、北高纬温度升高(降低)和赤道辐合带(Intertropical Convergence Zone,ITCZ)北移(南移)在百年至十年际尺度上存在紧密的联系,而这种联系可能是源于北大西洋经向翻转环流(Atlantic Meridional Overturning Circulation,AMOC)变化引起的北半球高纬与低纬地区的快速海气耦合。

关键词: CIS-8事件, 石笋, 东亚夏季风, 福建仙云洞, 亚旋回

CLC Number:

P532

LIU Xing, QIU Wanyin, DONG Wenyu, LI Yue, CAI Binggui, JIANG Xiuyang. East Asian Summer Monsoon CIS-8 event and its sub-cycle features recorded by precisely-dated high-resolution stalagmite from Xianyun Cave,western Fujian Province,China[J]. Journal of Palaeogeography（Chinese Edition）, 2025, 27(5): 1302-1313.

刘行, 邱万银, 董文玉, 李月, 蔡炳贵, 姜修洋. 闽西仙云洞高分辨率石笋记录的东亚夏季风CIS-8事件及亚旋回特征^*[J]. 古地理学报, 2025, 27(5): 1302-1313.

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样品编号深度-mm	²³⁸U^a /^μg·${g}^{{-}^{1}}$	²³²Th /^pg·g^-1	δ²³⁴U 测量值^a	δ²³⁴U_初始值（校正值^b）	[²³⁰Th/²³⁸U] （活度比^c）	[²³⁰Th/²³²Th]^d /^μg·g^-1	²³⁰Th年龄/^yr （未校正）	²³⁰Th年龄/^yr （校正值^c^，^e）	年龄/a B.P.
XY2-¹0-⁴1	8.722±0.0004	12924.1±80.4	1413.3±0.4	1552.3±0.4	0.65125±0.00049	7246±45	33246±29	33231±30	33157±30
XY2-¹0-⁷3	18.981±0.0226	1739.7±7.3	1399.9±3.0	1550.3±3.3	0.69728±0.00119	125436±547	36177±89	36176±89	36111±89
XY2-¹0-¹10	19.625±0.0011	58.6±72.7	1360.0±0.4	1506.7±0.5	0.68764±0.00022	3799201±4718819	36309±15	36309±15	36235±15
XY2-¹0-¹49	23.727±0.0383	152.4±13.9	1355.4±3.7	1502.9±4.1	0.69116±0.00126	1774237±161319	36607±102	36607±102	36534±102
XY2-¹0-²26	27.185±0.0229	76.3±13.2	1363.9±1.9	1513.4±2.2	0.69813±0.00091	4100810±710641	36875±66	36875±66	36803±66
XY2-¹0-²65	29.608±0.0273	515.5±13.7	1374.7±2.0	1526.4±2.3	0.70528±0.00071	667942±17695	37111±57	37111±57	37039±57
XY2-¹0-³26	26.339±0.0015	147.5±83.5	1376.2±0.4	1529.3±0.4	0.71022±0.00018	2091107±1183322	37384±13	37384±13	37310±13
XY2-¹0-³87	20.788±0.0012	140.2±74.1	1372.7±0.4	1526.4±0.5	0.71274±0.00021	1742326±921214	37601±15	37601±15	37527±15
XY2-¹0-⁴49	21.949±0.0221	33.5±12.5	1364.2±2.1	1518.6±2.3	0.71672±0.00079	7748831±2887942	38005±62	38005±62	37933±62
XY2-¹0-⁵09	23.449±0.0310	1622.3±7.6	1355.9±3.6	1510.5±4.0	0.71821±0.00127	171162±828	38255±104	38255±104	38190±104
XY2-¹0-⁵30	17.124±0.0011	696.6±120.2	1339.7±0.5	1495.8±0.6	0.72624±0.00035	294362±50806	39071±24	39070±24	38996±24

样品编号深度-mm	²³⁸U^a /^μg·${g}^{{-}^{1}}$	²³²Th /^pg·g^-1	δ²³⁴U 测量值^a	δ²³⁴U_初始值（校正值^b）	[²³⁰Th/²³⁸U] （活度比^c）	[²³⁰Th/²³²Th]^d /^μg·g^-1	²³⁰Th年龄/^yr （未校正）	²³⁰Th年龄/^yr （校正值^c^，^e）	年龄/a B.P.
XY2-¹0-⁴1	8.722±0.0004	12924.1±80.4	1413.3±0.4	1552.3±0.4	0.65125±0.00049	7246±45	33246±29	33231±30	33157±30
XY2-¹0-⁷3	18.981±0.0226	1739.7±7.3	1399.9±3.0	1550.3±3.3	0.69728±0.00119	125436±547	36177±89	36176±89	36111±89
XY2-¹0-¹10	19.625±0.0011	58.6±72.7	1360.0±0.4	1506.7±0.5	0.68764±0.00022	3799201±4718819	36309±15	36309±15	36235±15
XY2-¹0-¹49	23.727±0.0383	152.4±13.9	1355.4±3.7	1502.9±4.1	0.69116±0.00126	1774237±161319	36607±102	36607±102	36534±102
XY2-¹0-²26	27.185±0.0229	76.3±13.2	1363.9±1.9	1513.4±2.2	0.69813±0.00091	4100810±710641	36875±66	36875±66	36803±66
XY2-¹0-²65	29.608±0.0273	515.5±13.7	1374.7±2.0	1526.4±2.3	0.70528±0.00071	667942±17695	37111±57	37111±57	37039±57
XY2-¹0-³26	26.339±0.0015	147.5±83.5	1376.2±0.4	1529.3±0.4	0.71022±0.00018	2091107±1183322	37384±13	37384±13	37310±13
XY2-¹0-³87	20.788±0.0012	140.2±74.1	1372.7±0.4	1526.4±0.5	0.71274±0.00021	1742326±921214	37601±15	37601±15	37527±15
XY2-¹0-⁴49	21.949±0.0221	33.5±12.5	1364.2±2.1	1518.6±2.3	0.71672±0.00079	7748831±2887942	38005±62	38005±62	37933±62
XY2-¹0-⁵09	23.449±0.0310	1622.3±7.6	1355.9±3.6	1510.5±4.0	0.71821±0.00127	171162±828	38255±104	38255±104	38190±104
XY2-¹0-⁵30	17.124±0.0011	696.6±120.2	1339.7±0.5	1495.8±0.6	0.72624±0.00035	294362±50806	39071±24	39070±24	38996±24

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