IMHE OpenIR  > 山地表生过程与生态调控重点实验室
2012—2013年重庆雪玉洞洞穴系统碳循环特征
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
2016
Source Publication地球科学
ISSN1000-2383
Volume41Issue:8Pages:1424-1434
Other Abstract

重庆雪玉洞洞内CO2浓度之高,在国内外皆罕见,但此洞穴系统碳循环特征及控制因素仍不清楚.利用土壤二氧化碳分压(PCO2-soil)、洞内大气二氧化碳分压(PCO2-cave)、地下河水二氧化碳分压(PCO2-eq)、方解石饱和指数(SIc)、地下河水溶解无机碳同位素(δ13CDIC)等指标来研究雪玉洞洞内CO2浓度变化、控制因素以及地下河对洞内碳循环的影响.结果表明:雪玉洞上覆PCO2-soil雨季高,旱季低;降雨量是控制上覆PCO2-soil的重要因子.雪玉洞PCO2-cave变化规律明显,暖季高,冷季低;温度变化导致洞内外气流频繁交换是PCO2-cave突变的重要原因,地下河水CO2脱气能够在短时间内让PCO2-cave上升到较高值.雨季由于土壤CO2效应,地下河水具有低SIc、高PCO2-eq特性,矿化度较高,并且部分月份地下河水具有溶蚀性;旱季由于土壤CO2效应及降雨较少,地下河水呈现高SIc、低PCO2-eq特性,矿化度较低,以沉积为主.

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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
DOI10.3799/dqkx.2016.113
Indexed ByEI ; CSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5778541
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
Identifierhttp://ir.imde.ac.cn/handle/131551/18702
Collection山地表生过程与生态调控重点实验室
Affiliation1.中国地质科学院岩溶地质研究所国土资源部广西岩溶动力学重点实验室
2.联合国教科文组织国际岩溶研究中心
3.西南大学地理科学学院
4.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
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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