Sixty-three representative sites around the world were selected to analyze the long-term variability of deuterium excess (d-excess) and its association with air temperature and precipitation amount. The results from the Mann–Kendall test showed that d-excess tended to increase at two-thirds of the sites. We demonstrated from several perspectives that high temperatures and concentrated precipitation can counteract the correlation between d-excess and these two meteorological factors. Our findings suggested that d-excess was an indicator for climate change at sites controlled by a single factor; however, at sites affected by multiple factors its role was more complicated.

选择了全球 63 个具有代表性的站点，分析了氘过量（d-excess）的长期变化及其与气温和降水量的关系。Mann-Kendall 检验的结果表明，在三分之二的站点中，d 过量趋于增加。我们从多个角度证明了高温和集中降水可以抵消 d-过剩与这两个气象因素之间的相关性。我们的研究结果表明，d-过量是受单一因素控制的地点的气候变化指标；然而，在受多种因素影响的地点，其作用更为复杂。