IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Influences of air CO2 on hydrochemistry of drip water and implications for paleoclimate study in a stream-developed cave, SW China
Wang Xiaoxiao1,2,3; Wu Yanhong1; Shen Licheng3
Corresponding AuthorShen Licheng
2016
Source PublicationActa Geochimica
ISSN2096-0956
Volume35Issue:2Pages:172-183
Abstract

Cave air CO_2 is a vital part of the cave environment. Most studies about cave air CO_2 variations are performed in caves with no streams; there are few studies to date regarding the relationship of cave air CO_2 variations and drip water hydrochemistry in underground stream-developed caves. To study the relationship of underground stream, drip water, and cave air CO_2, monthly and daily monitoring of air CO_2 and of underground stream and drip water was performed in Xueyu Cave from 2012 to 2013. The results revealed that there was marked seasonal variation of air CO_2 and stream hydrochemistry in the cave. Daily variations of cave air CO_2, and of stream and drip water hydrochemistry, were notable during continuous monitoring. A dilution effect was observed by analyzing hydrochemical variations in underground stream and drip water after rainfall. High cave air CO_2 along with low pH and low delta~(13)C_(DIC) in stream and drip water indicated that air CO_2 was one of the dominant factors controlling stream and drip water hydrochemistry on a daily scale. On a seasonal scale, stream flows may promote increased cave air CO_2 in summer; in turn, the higher cave air CO_2 could inhibit degassing of drip water and make calcite delta~(13)C more negative. Variation of calcite delta~(13)C (precipitated from drip water) was in reverse of monthly temperature, soil CO_2, and cave air CO_2. Therefore, calcite delta~(13)C in Xueyu Cave could be used to determine monthly changes outside the cave. However, considering the different precipitation rate of sediment in different seasons, it was difficult to use stalagmites to reconstruct environmental change on a seasonal scale.

Keyword作者关键词:Carbon Dioxide Underground Stream Drip Water Paleoclimate Reconstruction Xueyu Cave
DOI10.1007/s11631-015-0085-z
Indexed ByEI ; CSCD
Language英语
CSCD IDCSCD:5729877
Funding OrganizationNational Natural Science Foundation of China ; Academician Foundation of Chongqing Science & Technology Commission
Accession numberAccession number:20162002382316
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18274
Collection山地表生过程与生态调控重点实验室
Affiliation1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.School of Geographical Sciences, Southwest University,Chongqing 400715, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wang Xiaoxiao,Wu Yanhong,Shen Licheng. Influences of air CO2 on hydrochemistry of drip water and implications for paleoclimate study in a stream-developed cave, SW China[J]. Acta Geochimica,2016,35(2):172-183.
APA Wang Xiaoxiao,Wu Yanhong,&Shen Licheng.(2016).Influences of air CO2 on hydrochemistry of drip water and implications for paleoclimate study in a stream-developed cave, SW China.Acta Geochimica,35(2),172-183.
MLA Wang Xiaoxiao,et al."Influences of air CO2 on hydrochemistry of drip water and implications for paleoclimate study in a stream-developed cave, SW China".Acta Geochimica 35.2(2016):172-183.
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