信阳师范大学学报（自然科学版）2026，Vol.39Issue(1)：19-25,7.DOI:10.3969/j.issn.2097-583X.2026.01.003
秦岭南北两侧降水稳定同位素特征与水汽来源差异分析
Analysis of the characteristics of precipitation stable isotopes and differences in water vapor sources on the northern and southern sides of the Qinling Mountains
摘要
Abstract
Hydrogen and oxygen isotope data from atmospheric precipitation were collected and analyzed at six stations located on both the northern and southern sides of the Qinling Mountains.Based on this analysis,the precipitation isotope lines,environmental effects,d-excess(deuterium excess)characteristics,and differences in water vapor sources between the two regions were elucidated.The following results were obtained:(1)The slope of the meteoric water line equation in the northern foot of the Qinling Mountains(7.84)was greater than that in the southern foot(7.52),which in turn was greater than that in the eastern monsoon region(7.46).For the intercept,the southern foot of the Qinling Mountains(13.10)was higher than the northern foot(10.10).(2)A temperature effect was identified on the northern slope during the cold season,while a strong precipitation amount effect was demonstrated on the southern slope.Significant latitude effects were exhibited on both sides,with depletion gradients that far exceeded the national average.(3)During summer,precipitation on the northern slope was determined to originate from low-latitude oceanic regions with high relative humidity,resulting in a d-excess lower than the annual average.In winter,precipitation was derived from westerly circulation carrying North Atlantic water vapor with lower relative humidity,leading to a higher d-excess.These findings provided important theoretical insights into the Qinling Mountains'role as the"Central Water Tower"and offered scientific support for water resource management on both sides of the mountain range.关键词
氢氧同位素/降水/水汽来源/秦岭Key words
hydrogen and oxygen isotopes/precipitation/water vapor sources/Qinling Mountains分类
天文与地球科学引用本文复制引用
李晓刚,赵咏琪,张艳艳..秦岭南北两侧降水稳定同位素特征与水汽来源差异分析[J].信阳师范大学学报（自然科学版）,2026,39(1):19-25,7.基金项目
国家自然科学基金项目(41701090) （41701090）
陕西省创新能力支撑计划项目(2019KJXX-026) （2019KJXX-026）
陕西省教育厅青年创新团队项目(22JP021) （22JP021）
商洛学院科研项目(18SKY002) （18SKY002）
