IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Alternative TitleCarbon Cycle Characteristics in Karst Cave System of Xueyu Cave from 2012 to 2013
任坤1,2,3; 沈立成3; 袁道先1,2,3; 王晓晓4; 徐尚全3
Corresponding Author任坤
Source Publication地球科学
Other Abstract



The high CO2 concentration in Xueyue cave, Chongqing, is rare at home and abroad. However, the circulation characteristics of carbon and its controlling factors in this cave system remain unknown. PCO2-soil, PCO2-cave, PCO2-eq, SIc, and δ13CDIC of subterranean stream were analyzed to investigate the laws of CO2 concentration variations in Xueyu cave and its contolling factors, as well as the impact on carbon cycle in this cave by subterranean stream. It is found that soil PCO2 mainly controlled by precipitation in subtropical areas was higher in rainy season than that of dry season. Cave air PCO2 exhibited seasonal variations, high cave air PCO2 typically occurred during warm periods, and low cave air PCO2 were typical of cold periods. It was ventilation driven by the temperature difference between cave and outside air that resulted in a sharp transition of cave air PCO2. Meanwhile, cave air PCO2 could rise to high level in a short period of time because of CO2 degassing from subterranean stream. Due to soil CO2 effect, groundwater became more mineralized water with low SIc and high water PCO2-eq, and dissolution in some months in rainy season. With the reduction of soil CO2 and precipitation, groundwater had low degree of mineralization with high SIc and low water PCO2-eq in dry season

Keyword岩溶洞穴系统 碳循环 二氧化碳分压 方解石饱和指数 雪玉洞 气候变化
Subject AreaP59
Indexed ByEI ; CSCD ; 北大中文核心
Funding Organization国家自然科学基金项目(No.41103068) ; 中国地质科学院基本科研业务费专项项目(No.2016005) ; 中国地质调查局项目(No.DD20160285) ; 中央高校基本科研业务费专项项目(No.XDJK2015D003) ; 重庆市院士专项项目(No.CSTC2013jcyjys20001)
Accession numberAccession number:20163602766430
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
任坤,沈立成,袁道先,等. 2012—2013年重庆雪玉洞洞穴系统碳循环特征[J]. 地球科学,2016,41(8):1424-1434.
APA 任坤,沈立成,袁道先,王晓晓,&徐尚全.(2016).2012—2013年重庆雪玉洞洞穴系统碳循环特征.地球科学,41(8),1424-1434.
MLA 任坤,et al."2012—2013年重庆雪玉洞洞穴系统碳循环特征".地球科学 41.8(2016):1424-1434.
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