IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Wang Xiaoxiao1; Wu Yanhong1; Shen Licheng2
Source Publicationactageochimica
AbstractCave 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 δ~(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 δ~(13)C more negative. Variation of calcite δ~(13)C (precipitated from drip water) was in reverse of monthly temperature, soil CO_2, and cave air CO_2. Therefore, calcite δ~(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.
Document Type期刊论文
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. influencesofairco2onhydrochemistryofdripwaterandimplicationsforpaleoclimatestudyinastreamdevelopedcaveswchina[J]. actageochimica,2016,35(2):172.
APA Wang Xiaoxiao,Wu Yanhong,&Shen Licheng.(2016).influencesofairco2onhydrochemistryofdripwaterandimplicationsforpaleoclimatestudyinastreamdevelopedcaveswchina.actageochimica,35(2),172.
MLA Wang Xiaoxiao,et al."influencesofairco2onhydrochemistryofdripwaterandimplicationsforpaleoclimatestudyinastreamdevelopedcaveswchina".actageochimica 35.2(2016):172.
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