中文摘要：

通过对贵州关岭纳朵洞洞内滴水和池水及洞顶上方土壤渗透水、表层岩溶泉点和大气降水的水文水化学特征及氢氧同位素2个水文年的动态观测,结合当地气象数据,分析了纳朵洞洞穴滴水δ^18O和δD变化特征及其对地表气候变化的响应。结果表明：1纳朵洞4处滴水点的δ^18O和δD均分布在靠近当地大气降水线的右下方,说明滴水的δ^18O和δD体现了当地大气降水δ^18O和δD的平均水平;2纳朵洞大气降水和土壤渗透水中δ^18O和δD存在明显的季节变化,冬春偏重,夏秋偏轻;3纳朵洞滴水、池水和表层岩溶泉的δ（18）O和δD季节变化不明显,但变化趋势趋于一致,记录了年际降水量的变化,反映了研究区的旱涝情况。研究结果可为利用洞穴石笋研究古气候特征提供依据。

英文摘要：

Through two years monitoring on hydro- chemical characteristics and hydrogen and oxygen isotope indexes of dripping water and pool water inside Naduo Cave in Guanling County of Guizhou Province,soil infiltration water from the top of the cave roof,epikarst springs and precipitation,and based on local meteorological data,we analyzed the seasonal variation characteristics of cave dripping water hydrogen and oxygen isotope and their response to ground climate change. The results show that：（ 1） The δ^18O and δD of all the four monitoring points of dripping water are distributed at the lower right to the Local Meteoric Water Line（ LMWL）,which means that the δ^18O and δD of dripping water represented the average composition of local precipitation;（ 2） The seasonal variation of δ^18O and δD value of soil infiltration water and atmospheric precipitation are obvious in study area,getting lighter in rainy season and getting heavier in dry season;（ 3） The seasonal variation of δ^18O and δD value of cave dripping water,pool water and epikarst spring are not obvious,but their variation trend are consistent,and record the interannual variation characteristics of precipitation and reflect the drought and flood situations of the study area. The results can provide reference for the research of ancient climate characteristics by using cave stalagmite.