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Seasonal and Inter-Annual Variations of Stable Isotopic Characteristics of Rainfall and Cave Water in Shennong Cave, Southeast China, and Its Paleoclimatic Implication
Tian, Ye1; Zhang, Haiwei1,2; Zhang, Rui1; Zhang, Fan1; Liang, Zeyuan1; Cai, Yanjun1,2; Cheng, Hai1,2
Corresponding AuthorZhang, Haiwei(zhanghaiwei@xjtu.edu.cn)
2021-12-14
Source PublicationFRONTIERS IN EARTH SCIENCE
Volume9Pages:11
AbstractSpeleothem calcite stable oxygen isotope (delta O-18(C)) is one of the most widely used proxies in paleoclimate research, and understanding its seasonal-annual variability is very significant for palaeoclimate reconstruction. Five-year precipitation and karst cave water from 2016 to 2021 were monitored in Shennong cave, Jiangxi Province, Southeast China. The local meteoric water line (LMWL) is delta D = 8.20 x delta O-18 + 13.34, which is similar to the global meteoric water line. The stable hydrogen and oxygen isotope (delta D and delta O-18) characteristics of precipitation and cave water were studied. delta O-18 and delta D of precipitation and cave water show obvious seasonal variations. Lower precipitation delta O-18 and delta D generally occur during summer and autumn compared with higher delta O-18 and delta D values during winter and spring. Meanwhile, low precipitation delta O-18 values do not only appear in June-July when precipitation is the highest of the year but also appear in August-September when precipitation is limited. The back-trajectory analysis of monsoon precipitation moisture sources shows that the moisture uptake regions vary little on inter-annual scales; the water vapor of rainfall in June-July comes from the South China Sea and the Bay of Bengal, while the moisture source in August-September is mainly from the West Pacific and local area. The El Nino-Southern Oscillation is an important factor affecting the value of delta O-18 by modulating the percentage of summer monsoon precipitation in the annual precipitation and moisture source. The relationship between amount-weighted monthly mean precipitation delta O-18 and Nino-3.4 index shows that the East Asian summer monsoon (EASM) intensifies during La Nina phases, resulting in more precipitation in monsoon season (May to September, MJJAS) and lower delta O-18 values, and vice versa during El Nino phases.
Keyworddrip water hydrogen and oxygen isotope East Asian summer monsoon moisture source cave monitor
DOI10.3389/feart.2021.794762
WOS KeywordSPRING PERSISTENT RAINS ; ASIAN MONSOON PRECIPITATION ; SUMMER MONSOON ; OXYGEN ISOTOPES ; DRIP WATERS ; VARIABILITY ; DEUTERIUM ; CLIMATE ; SCALE ; CIRCULATION
Indexed BySCI ; SCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000739064000001
PublisherFRONTIERS MEDIA SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/17354
Collection现代环境研究室
Corresponding AuthorZhang, Haiwei
Affiliation1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
Recommended Citation
GB/T 7714
Tian, Ye,Zhang, Haiwei,Zhang, Rui,et al. Seasonal and Inter-Annual Variations of Stable Isotopic Characteristics of Rainfall and Cave Water in Shennong Cave, Southeast China, and Its Paleoclimatic Implication[J]. FRONTIERS IN EARTH SCIENCE,2021,9:11.
APA Tian, Ye.,Zhang, Haiwei.,Zhang, Rui.,Zhang, Fan.,Liang, Zeyuan.,...&Cheng, Hai.(2021).Seasonal and Inter-Annual Variations of Stable Isotopic Characteristics of Rainfall and Cave Water in Shennong Cave, Southeast China, and Its Paleoclimatic Implication.FRONTIERS IN EARTH SCIENCE,9,11.
MLA Tian, Ye,et al."Seasonal and Inter-Annual Variations of Stable Isotopic Characteristics of Rainfall and Cave Water in Shennong Cave, Southeast China, and Its Paleoclimatic Implication".FRONTIERS IN EARTH SCIENCE 9(2021):11.
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