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《Journal of Soil and Water Conservation》 2017-04
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Seasonal Response Between Soil CO_2 and Karst Cave CO_2 Concentration

YIN Chao;ZHOU Zhongfa;TIAN Zhonghui;CAO Mingda;ZHANG Jie;PAN Yanxi;WANG Yanlin;School of Karst Science,Guizhou Normal University;The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province;  
In order to reveal the significance of soil CO_2 on cave environment,statistical and regression analysis were conducted on the related data of the cave environmental indexes and the overlying soil properties in2016.The results showed that the cave air CO_2 concentration and soil CO_2 concentration presented the significant seasonal variation and obvious hysteresis phenomenon.The difference between summer and winter of cave air CO_2 concentration corresponded with soil 2# was 793~884 mg/kg.The highest differences of soil water PCO_2 and drip water PCO_2 between summer and winter were 1.12 and 0.41 respectively.So the drip water PCO_2 and soil water PCO_2 also showed obviously seasonal variations.The lag phenomenon was shown among soil CO_2,cave air CO_2,drip water PCO_2 and soil water PCO_2,e.g.,the coefficients between soil water PCO_2 and drip water PCO_2 were improved from 0.123 without hysteresis to 0.596 with hysteresis.Under the hysteresis,the highest total contribution of soil CO_2 concentration to cave air CO_2 concentration was 84.6%,higher than that without hysteresis.
【Fund】: 国家自然科学基金地区项目“岩溶洞穴CO2迁移变化机制及对洞穴岩溶环境的影响研究”(41361081);; 贵州省高层次创新型人才培养计划项目——“百”层次人才(黔科合平台人才[2016]5674);; 贵州省科技计划项目“贵州省洞穴调查数据技术服务”(黔科合G字[2014]4004-2号);; 贵州省重大应用基础研究项目“喀斯特石漠化生态修复及生态经济系统优化调控研究-岩土类型格局”(黔科合JZ字[2014]200201)
【CateGory Index】: P463.2;S154.1
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