贵州纳朵洞滴水离子浓度变化特征及其气候意义  

Variation Characteristics and Climatic Signifi cance of Cave Drop Water Ion Concentration in Naduo Cave of Guizhou

作　　者：王家录 李宪荣 Wang Jialu;Li Xianrong(School of Resources and Environmental Engineering,Anshun University,Guizhou,561000)

机构地区：[1]安顺学院资源与环境工程学院,贵州561000

出　　处：《当代化工研究》2022年第22期52-54,共3页Modern Chemical Research

基　　金：安顺学院博士基金项目“安顺地区全新世石笋与现代洞穴滴水监测研究”(项目编号:asxybsjj(202101)号);安顺学院产学研合作教育项目“水土保持与荒漠化防治专业产学研合作教育基地”(项目编号:asxycxy(201802)号)。

摘　　要：随着石笋古气候记录研究的不断深入,微量元素作为一种重要的气候代用指标,引起了重视。通过对贵州关岭县纳朵洞2013年1月至2015年12月期间,洞内4处滴水点(D4、D7、D9、D11)和1处池水点(DC)的离子浓度进行3个水文年的动态观测,并结合当地气象数据,分析纳朵洞滴水/池水Ca^(2+)、Mg^(2+)、Sr^(2+)浓度的变化特征及其环境意义。结果表明:纳朵洞4处滴水点(D4、D7、D9、D11)和1处池水点DC的Ca^(2+)、Mg^(2+)、Sr^(2+)浓度变化特征为冬春变化平缓,夏秋变化幅度大,对降水量响应敏感,强降雨导致Ca^(2+)和Mg^(2+)很大波动,Sr^(2+)浓度异常降低。因此,在应用微量元素作为石笋古气候记录的代用指标时,尚需多指标验证。With the deepening of the study of paleoclimatic records of stalagmites,trace elements as an important climate proxy index have attracted more and more attention.From January 2013 to December 2015,the ion concentrations of four drip sites(D4,D7,D9,D11)and one pool water(DC)in Naduo Cave in Guanling County,Guizhou Province were observed for three hydrological years.Combined with local meteorological data,the variation characteristics of Ca^(2+),Mg^(2+) and Sr^(2+) concentrations in drip/pool water of Naduo Cave and their climatic significance were analyzed.The results as follows:Ca,Mg and Sr ion concentration of four dripping water sites(D4,D7,D9,D11),and the pool water(DC)in Naduo cave is gentle changes in winter and spring,change amplitude is large in summer and autumn,sensitive to precipitation response.Heavy rains led to Ca^(2+) and Mg^(2+) concentration large fluctuations,Sr^(2+) concentration anomaly.Therefore,the application of trace elements as proxy indexes of paleoclimatic records of stalagmites needs to be verified by multiple indexes.

关 键 词：洞穴滴水 离子浓度 降水量 气候意义 贵州纳朵洞 

分 类 号：P66[天文地球—地质学]