Understanding snow hydrological processes through the lens of stable water isotopes

• DOI: 10.1002/wat2.1311
• Publication Date: 2018-07-26T04:05:15Z
• Authors: Harsh Beria; Joshua R. Larsen; Natalie Claire Ce...; Anthony Michelon; Torsten Vennemann; Bettina Schaefli
• Keywords: bepress|Physical Sciences and Mathematics; bepress|Physical Sciences and Mathematics|Earth Sciences|Glaciology; EarthArXiv|Physical Sciences and Mathematics|Environmental Sciences; Glaciology; bepress|Physical Sciences and Mathematics|Earth Sciences; EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Glaciology; EarthArXiv|Physical Sciences and Mathematics|Earth Sciences; 15. Life on land; 01 natural sciences; EarthArXiv|Physical Sciences and Mathematics|Environmental Sciences|Water Resource Management; EarthArXiv|Physical Sciences and Mathematics; Water Resource Management; bepress|Physical Sciences and Mathematics|Environmental Sciences|Water Resource Management; 13. Climate action; Earth Sciences; Physical Sciences and Mathematics; bepress|Physical Sciences and Mathematics|Earth Sciences|Hydrology; bepress|Physical Sciences and Mathematics|Environmental Sciences; 910 Geography & travel; Hydrology; EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Hydrology; Environmental Sciences; 0105 earth and related environmental sciences

Snowfall may have different stable isotopic compositions compared with rainfall, allowing its contribution to potentially be tracked through the hydrological cycle. This review summarizes the state of knowledge of how different hydrometeorological processes affect the isotopic composition of snow in its different forms (snowfall, snowpack, and snowmelt), and, through selected examples, discusses how stable water isotopes can provide a better understanding of snow hydrological processes. A detailed account is given of how the variability in isotopic composition of snow changes from precipitation to final melting. The effect of different snow ablation processes (sublimation, melting, and redistribution by wind or avalanches) on the isotope ratios of the underlying snowpack are also examined. Insights into the role of canopy in snow interception processes, and how the isotopic composition in canopy underlying snowpacks can elucidate the exchanges therein are discussed, as well as case studies demonstrating the usefulness of stable water isotopes to estimate seasonality in the groundwater recharge. Rain‐on‐snow floods illustrate how isotopes can be useful to estimate the role of preferential flow during heavy spring rains. All these examples point to the complexity of snow hydrologic processes and demonstrate that an isotopic approach is useful to quantify snow contributions throughout the water cycle, especially in high‐elevation and high‐latitude catchments, where such processes are most pronounced. This synthesis concludes by tracing a snow particle along its entire hydrologic life cycle, highlights the major practical challenges remaining in snow hydrology and discusses future research directions.This article is categorized under:

Science of Water > Hydrological Processes Science of Water > Methods