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Multi-Timescale Variations of δ18O-δ13C in Stalagmites: Insights Into Isotopic Disequilibrium and Human Activities

文献类型：期刊论文

作者Duan, Wuhui2,3; Cai, Binggui4; Tao, Tao5; Yang, Xiao1; Tan, Ming2
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2023-12-27
卷号128期号:24页码:13
ISSN号2169-897X
关键词annually laminated stalagmites multi-timescale variations in delta O-18 and delta C-13 isotopic disequilibrium climate changes human activities
DOI10.1029/2023JD039607
英文摘要The reasons for covariations of speleothem delta C-13 and delta O-18 remain controversial, primarily due to the limited high-resolution stalagmite records that can be compared with meteorological data. This study presents delta C-13 and delta O-18 records of two coeval, annually laminated stalagmites (TS9701 and TS9501) spanning the past similar to 2000 years from Shihua cave, Beijing, northern China. The low correlation between stalagmite TS9701 records, with annual resolution, and local annual precipitation as well as mean annual temperature on interannual to decadal scales indicates that the positive covariations of delta O-18 and delta C-13 in TS9701 are partly attributed to kinetic isotope effects caused by rapid CO2 degassing. Isotopic disequilibrium between HCO3(aq)- and drip water, induced by prior calcite precipitation on cave ceiling and stalactite surface, is another potential contributing factor. delta O-18 and delta C-13 exhibits distinct patterns on multidecadal to millennial timescales. delta O-18 records show notable centennial variability, aligning with El Ni & ntilde;o-Southern Oscillation cycles. In contrast, delta C-13 profiles reveal a decreasing trend during the first similar to 750 years, followed by an increasing trend. Prior to 1588 AD, variations in delta C-13 broadly correspond to changes in warm season temperature and/or moisture on centennial scale. Both delta C-13 records show an abrupt enrichment between 1588 and 1654 AD. Historical documents indicate that this anomaly is likely attributed to coal mining and resultant deforestation around Shihua cave during late-Ming and early-Qing Dynasties. In summary, while isotopic disequilibrium can cause high-frequency covariations of speleothem delta O-18 and delta C-13, it does not erase the imprints of climate changes and human activities on multidecadal to millennial timescales.
WOS关键词PACIFIC SST VARIABILITY ; HOLOCENE ASIAN MONSOON ; STABLE-ISOTOPE ; OXYGEN-ISOTOPE ; SPELEOTHEM RECORD ; PAST MILLENNIUM ; DRIP WATER ; CAVE ; DELTA-C-13 ; CARBON
资助项目National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26020000] ; [42172208] ; [41772184]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:001121689500001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/111530]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Duan, Wuhui; Cai, Binggui; Tan, Ming
作者单位1.Natl Museum China, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
3.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China
4.Fujian Normal Univ, Key Lab Humid Subtrop Ecogeog Proc, Minist Educ, Fuzhou, Peoples R China
5.Chinese Acad Geol Sci, Inst Geomech, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Duan, Wuhui,Cai, Binggui,Tao, Tao,et al. Multi-Timescale Variations of delta18O-delta13C in Stalagmites: Insights Into Isotopic Disequilibrium and Human Activities[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2023,128(24):13.
APA Duan, Wuhui,Cai, Binggui,Tao, Tao,Yang, Xiao,&Tan, Ming.(2023).Multi-Timescale Variations of δ18O-δ13C in Stalagmites: Insights Into Isotopic Disequilibrium and Human Activities.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,128(24),13.
MLA Duan, Wuhui,et al."Multi-Timescale Variations of δ18O-δ13C in Stalagmites: Insights Into Isotopic Disequilibrium and Human Activities".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128.24(2023):13.

入库方式： OAI收割

来源：地质与地球物理研究所

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