Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 121 - 133
Published: Oct. 4, 2024
Language: Английский
Energy, Journal Year: 2023, Volume and Issue: 282, P. 128770 - 128770
Published: Aug. 17, 2023
Language: Английский
Citations
28
ACS ES&T Water, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 16, 2025
Climate change and cryosphere degradation may enhance the concentrations of heavy metals in high-mountain rivers. However, downstream export these contaminants to lower elevations is still overlooked. In this study, we investigated spatial temporal patterns dissolved bioavailable nickel upper Etsch/Adige river basin (1590 km2; 54 sites) during period 2005–2023. Furthermore, same seasonally (2022–2023) along a tributary (Schnals/Senales River), from glacier origin down confluence with Etsch River (13 sites). Concentrations both forms increased past decade by up 4 times, yet only reaches draining acidic metamorphic Ötztal Unit. Sulfide oxidation, more intense at sites featuring larger glaciers, rock permafrost extent their catchment, enhanced concentrations. Along Schnals River, values were elevated proglacial waters (dissolved fraction 112 μg L–1), gradually decreased moving elevations, dropped (from 20 30 2–5 L–1) large reservoir. Currently, exceed EU environmental quality standards 40% sites, demonstrating sharp implications that be extended other similar geological cryospheric settings.
Language: Английский
Citations
0
Water Resources Research, Journal Year: 2025, Volume and Issue: 61(2)
Published: Feb. 1, 2025
Abstract Excessively low stream flows harm ecosystems and societies, so two key goals of low‐flow hydrology are to understand their drivers predict severity frequency. We show that linear regressions can accomplish both across diverse catchments. analyze 230 unregulated moderate high relief catchments rainfall‐dominated, hybrid, snowmelt‐dominated, glacial regimes in British Columbia, Canada, with drainage areas spanning 5 orders magnitude from 0.5 55,000 km 2 . Summer decreasing rainfall‐dominated hybrid but have been stable remain snowmelt or glacial‐dominated. However, we find since 1950 approximately one third snowmelt‐dominated transitioned a rain‐snow regime. The declines dominantly driven by summer precipitation temperature, only weakly influenced winter storage. apply this understanding create regression models the minimum flow using monthly temperature data. These outperform distributed process‐based for every common goodness‐of‐fit metric; performance improvement is mostly result abandoning requirement simulate all parts annual hydrograph. Using these reconstruct streamflow droughts anomalies 1901 2022. reproduce recent drying trends catchments, also present conditions comparable those seen hundred years ago. anomalously last century were caused large deficits while current rising temperatures despite near‐normal precipitation.
Language: Английский
Citations
0
Journal of Hydrology, Journal Year: 2024, Volume and Issue: 635, P. 131137 - 131137
Published: March 27, 2024
Language: Английский
Citations
2
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 953, P. 175706 - 175706
Published: Aug. 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.
Language: Английский
Citations
2
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 939, P. 173525 - 173525
Published: May 27, 2024
Language: Английский
Citations
1
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 944, P. 173826 - 173826
Published: June 12, 2024
Language: Английский
Citations
1
ACS ES&T Water, Journal Year: 2024, Volume and Issue: 4(12), P. 5264 - 5274
Published: Nov. 13, 2024
Little is known to date about the processes governing natural acid rock drainage (NARD) generated by glaciers. We used paragneiss samples from a catchment with NARD glacier in Italian Alps for long-term leaching experiments under conditions that are possible within The findings clearly suggest at low neutralization capacity of rock, dissolution sulfide minerals, even if they present trace amounts, may be most important process controls groundwater acidity 1 °C, typical temperature discharge acidic increase solubility and mobility aquifer lithology-specific elements, concentrations some heavy metals geogenic origin (e.g., Mn Ni) greatly exceed health standards after six month interaction water paragneisses. Diurnal freeze–thaw cycles were found 6–7 times more effective transformation coarse fragments fine-grained debris fresh, reactive mineral surfaces, compared temperatures above freezing. Cyclic freezing favors an enhanced formation amorphous silica, highly adsorbent metal ions, its redissolution unfrozen layers glaciers represent additional source elements.
Language: Английский
Citations
1
Global and Planetary Change, Journal Year: 2024, Volume and Issue: 244, P. 104654 - 104654
Published: Nov. 26, 2024
Language: Английский
Citations
1
Published: Jan. 1, 2024
Language: Английский
Citations
0