摘要
为阐明昆明地区稳定同位素与大气降水的关系,对GNIP昆明站点1986～2003年δD和δ18O进行分析,初步建立当地大气降水线方程,并与中国及全球降水线方程进行对比,揭示该降水线方程的特征.研究结果表明：大气降水稳定同位素组成受到温度、蒸发、水汽源地等多种因素的复杂影响,在不同时间有很大差异.研究区大气降水稳定同位素存在明显的季节变化,雨季偏负,旱季偏重,降雨效应明显,并在很大程度上影响和掩盖了温度效应.而d受其特殊地理位置影响,呈现出雨季高旱季低的独特变化特征.
To elucidate the relationship between stable isotope and the extreme drought in Kunming area, analysis of the stable isotope data of the GNIP in Kunming site from 1986 to 2003, and the precipitation line equation is rough forward. Comparison with the national and global equation is made to reveal the characters of this equation. According to researching, the stable isotopic compositions of precipitation exhibit great diversities in different areas due to influences of multiple factors, such as temperature, evaporation, rainfall amount moisture source and others. Both δD and δ^18O values in rainwater exhibit significant seasonal variations, having lower values in the rainy season and higher one in the dry season. The amount effect of precipitation is very distinct, that concealed the temperature effect. Got the special geographical position, d present a characteristics of higher values in the rainy season and lower values in the dry season.
出处
《云南地理环境研究》
2013年第5期90-95,共6页
Yunnan Geographic Environment Research
基金
国家自然科学基金:"滇东岩溶高原峰林湖盆水源枯竭机制研究"(41261007)
云南省自然科学基金:"基于稳定同位素的滇东岩溶区云南松水分利用策略研究"(2011FZ077)共同资助
关键词
稳定同位素
大气降水
水汽来源
雨量效应
昆明
stable isotope
precipitation
moisture source
amount effect of precipitation
Kunming
