Investigating the origin of solutes in rock glacier springs in the Swiss Alps: A conceptual model

Frontiers in Earth Science, Год журнала: 2023, Номер 11

Опубликована: Фев. 9, 2023

In the current context of climate change, rock glaciers represent potentially important water resources due to melting ice they contain and/or their role as high mountain reservoirs. However, hydrology these high-altitude debris accumulations is poorly known. Understanding origin and quality glacier outflows essential evaluate contribution impact on headwater systems. this study, we developed a conceptual model explaining main hydro-chemical processes in active permafrost warming. This was derived from isotopic physico-chemical analyses performed six Swiss Alps during warm season. Similar chemical were sources not fed by at all study sites. The ion content (SO 4 2- , Ca 2+ Mg NO 3 − ) emerging globally higher than that glaciers. Besides, electrical conductivity springs increased season, tracking increasing perennial ground melting. We hypothesized ionic fingerprint points mainly remobilization compounds stored colder period past cryosphere (e.g., 1960s–1980s).

Язык: Английский

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Isotopic and chemical signatures of high mountain rivers in catchments with contrasting glacier and rock glacier cover

Journal of Hydrology, Год журнала: 2023, Номер 623, С. 129779 - 129779

Опубликована: Июнь 7, 2023

Glaciers and rock glaciers are key elements of mountain hydrological systems, but their relative influence on the chemical isotopic conditions streams within river continuum is still overlooked. During three consecutive years (2019–2021), we studied 24 stream sections in two catchments (Plima Schnals, Eastern Italian Alps) with varying cover glaciers. End-member mixing models based δ2H d-excess revealed a large spatial temporal variability contribution different water sources to runoff. Overall, snowmelt (77 ± 17 %) rainwater (5 5 were largest smallest runoff components, respectively. The ice melt was high fed by (23 15 (16 16 %). In highly-glacierised Plima basin, tracer-based estimation annual fraction matched reasonably well (90–167%) mean glacial loss estimated geodetic mass balance. contrast, found overestimation component derived from poorly glacierised (but glacier-rich) Schnals catchment. influenced glaciers, at both particular patterns electrical conductivity resulted unreliable estimates meltwater/groundwater fractions Depending local lithology, concentrations trace (Sr, Ni, Ba, Mn, Zn, Al) close/below limits quantification non-glacial streams. alpine areas, abundance can confound signature imparted thus hindering use methods for hydrograph separation. Under combined surpass drinking quality even downstream as observed catchment nickel.

Язык: Английский

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Drylands becoming drier: evidence from North Patagonia, Argentina

Regional Environmental Change, Год журнала: 2023, Номер 23(4)

Опубликована: Дек. 1, 2023

Язык: Английский

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Factors controlling the water quality of rock glacier springs in European and American mountain ranges

The Science of The Total Environment, Год журнала: 2024, Номер 953, С. 175706 - 175706

Опубликована: Авг. 27, 2024

Rock glaciers (RGs) provide significant water resources in mountain areas under climate change. Recent research has highlighted high concentrations of solutes including trace elements RG-fed waters, with negative implications on quality. Yet, sparse studies from a few locations hinder conclusions about the main drivers solute export RGs. Here, an unprecedented effort, we collected published and unpublished data rock glacier hydrochemistry around globe. We considered 201 RG springs ranges across Europe, North South America, using combination machine learning, multivariate univariate analyses, geochemical modeling. found that 35 % issuing intact RGs (containing internal ice) have quality below drinking standards, compared to 5 connected relict (without ice). The interaction ice bedrock lithology is responsible for springs. Indeed, higher sulfate sourcing originating RGs, mostly specific lithological settings. Enhanced sulfide oxidation elevated element concentrations. Challenges management may arise catchments rich where predisposing geology would make these hotspots. Our work represents first comprehensive attempt identify waters.

Язык: Английский

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Understanding streamflow variability over drylands in a water-scarce region: A case study in Patagonia

Hydrological Sciences Journal, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Язык: Английский

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Snowmelt and subsurface heterogeneity control tree water sources in a subalpine forest

Ecohydrology, Год журнала: 2024, Номер 17(7)

Опубликована: Июль 17, 2024

Abstract In high mountain areas, snowmelt water is a key—yet fading—hydrological resource, but its importance for soil recharge and tree root uptake understudied. these environments, heterogeneous terrains enhance highly variable availability of groundwater resources that can be accessed by plants. We conducted tracer‐based study on subalpine forest in the Italian Alps. investigated isotopic composition ( 2 H 18 O) snowmelt, precipitation, spring water, water—at different locations depths—and xylem twigs taken from alpine larch, Swiss stone pine alpenrose plants during bi‐weekly field campaigns (growing seasons 2020 2021). Mixing models based δ O revealed large contribution to particularly early summer. depths using sap flow records date back end‐member signatures. found flexible use shallow deeper plants, with more likely used larger trees late Results data were combined geophysical observations subsurface structure develop conceptual model about exploitation depending their location (shallow slope vs. saturated area). Our highlights relevance high‐elevation terrestrial ecosystems, where substrates shape at and, turn,

Язык: Английский

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Hydrochemical and isotopic composition of periglacial watersheds in Northern Patagonian Andes

Journal of South American Earth Sciences, Год журнала: 2023, Номер 123, С. 104204 - 104204

Опубликована: Янв. 28, 2023

Язык: Английский

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Variability in Nutrient Dissipation in a Wastewater Treatment Plant in Patagonia: A Two-Year Overview

Environmental Management, Год журнала: 2022, Номер 71(4), С. 773 - 784

Опубликована: Дек. 8, 2022

Язык: Английский

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Rock glacier and solifluction lobes groundwater as nutrient sources and refugia for unique macroinvertebrate assemblages in a mountain ecosystem of the North Patagonian Andes

Aquatic Sciences, Год журнала: 2023, Номер 86(1)

Опубликована: Дек. 1, 2023

Язык: Английский

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Role of Mountain Glaciers in the Hydrological Dynamics of Headwater Basins in the Wet Andes

Опубликована: Янв. 1, 2024

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Язык: Английский

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