Stable isotopes are increasingly being used in many scientific fields, including environmental sciences. In this study we measured the variation in the stable hydrogen and oxygen isotope composition of fog water, rain water (in the form of bulk falling precipitation) and throughfall water in the Šumava (the Bohemian Forest), Krkonoše (the Giant Mts.) and Jizerské hory (the Jizera Mts.) Mts. in October-November 2017. In total, 46 cumulative two-week samples were collected and analysed. Our results indicate that the overall stable hydrogen and oxygen isotope composition of fog and rain samples differed significantly, fog being isotopically enriched in the heavier isotopes 2H and 18O relative to rain. In contrast to our assumption, throughfall water was generally depleted in the heavier isotopes 2H and 18O relative to rainwater. Hence, the simple mixing model for most samples yielded an unrealistic percentage outside the reasonable range of 0–100%. For few samples, however, the estimated contribution of fog to throughfall ranged between 3 and 8% based on δ2H and 4 and 7% based on δ 18O, which is lower than that estimated for the same mountain regions by other authors using different methods and significantly lower than that reported for mountain ranges in neighbouring countries. Although using stable isotopes is a promising tool for determining the contribution of fog to the hydrological budget when assessing atmospheric deposition, the critical limitations are in the collection, manipulation and storing of the samples.

中文翻译：

---

基于稳定的氢和氧同位素组成，评估雾对捷克山区森林湿润大气沉积的贡献：初步结果

稳定同位素正越来越多地用于包括环境科学在内的许多科学领域。在这项研究中，我们测量了Šumava（波希米亚森林），Krkonoše（巨人山）和Jizerskéhory（Jizera山）。在2017年10月至11月之间。总共收集并分析了46个累积的两周样本。我们的结果表明，雾和雨样品的总体稳定氢和氧同位素组成存在显着差异，相对于雨，雾在同位素上更富于2H和18O同位素。与我们的假设相反，与雨水相比，重同位素2H和18O中的穿透水通常被消耗掉。因此，对于大多数样品而言，简单的混合模型所产生的百分比不合理，超出了0-100％的合理范围。但是，对于少数几个样品，雾对穿透的估计贡献基于δ2H为3％至8％，基于δ18O为4％至7％，这比其他作者使用不同方法和方法对同一山区的估计低。大大低于邻国山脉的报道。尽管在评估大气沉积时使用稳定同位素是确定雾对水文预算贡献的一种有前途的工具，但关键的局限性在于样品的收集，处理和存储。基于δ2H的估计雾对穿透的贡献在3％到8％之间，基于δ18O的估计在4％到7％之间，这比其他作者使用不同方法对同一山区的估计低，并且显着低于报道的邻国的山脉。尽管在评估大气沉积时使用稳定同位素是确定雾对水文预算贡献的一种有前途的工具，但关键的局限性在于样品的收集，处理和存储。基于δ2H的估计雾对穿透的贡献在3％到8％之间，基于δ18O的估计在4％到7％之间，这比其他作者使用不同方法对同一山区的估计低，并且显着低于报道的邻国的山脉。尽管在评估大气沉积时使用稳定同位素是确定雾对水文预算贡献的一种有前途的工具，但关键的局限性在于样品的收集，处理和存储。