Abstract The impacts of glacier mass and area loss are assumed to affect stream hydrology and related ecosystems. We applied wavelet analysis to high frequency time series of discharge, conductivity, turbidity, air and water temperature in mountain streams influenced by a gradient of diverse glacier catchment coverages from 0 to 28%. All parameters were recorded during 200–250 day period in 24 mountain streams in Switzerland and Ecuador. We interpreted the range of glacier coverage as a proxy of glacier melt effect linked to modification in glacier cover based on a space-for-time substitution approach. We used the diurnal variation power and frequency as hydrological parameters to quantify the intensity and occurrence of significant diurnal variations in the different mountain catchments. Our results show that the reduction in glacier cover would reduce the intensity and occurrence of diurnal variations in discharge, turbidity and conductivity, and the intensity of diurnal variations in water temperature. Discharge and conductivity were affected in a similar way, while the impact on turbidity was less significant. Furthermore, due to their different climatic regimes, the diurnal discharge in the tropical Andes was more impacted than in the Alps, indicating that the impacts of global change on glacier streams would be stronger in the tropical Andes than in the Alps.

中文翻译：

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冰川退缩改变了高山和安第斯溪流水文变量的日变化强度和频率

摘要 冰川质量和面积损失的影响被认为会影响河流水文和相关生态系统。我们将小波分析应用于山区溪流中的流量、电导率、浊度、空气和水温的高频时间序列，这些时间序列受不同冰川集水覆盖率从 0% 到 28% 的梯度影响。所有参数都是在 200-250 天期间在瑞士和厄瓜多尔的 24 条山间溪流中记录的。我们将冰川覆盖范围解释为与基于时空替代方法的冰川覆盖修改相关的冰川融化效应的代表。我们使用日变化功率和频率作为水文参数来量化不同山区流域中显着日变化的强度和发生率。我们的研究结果表明，冰川覆盖的减少会降低流量、浊度和电导率的昼夜变化的强度和发生率，以及水温的昼夜变化强度。流量和电导率以类似方式受到影响，而对浊度的影响不那么显着。此外，由于气候状况不同，热带安第斯山脉的昼夜流量受到的影响大于阿尔卑斯山脉，表明全球变化对冰川流的影响在热带安第斯山脉比在阿尔卑斯山脉更大。