Massive mobilization of toxic elements from an intact rock glacier in the central Eastern Alps DOI Creative Commons
Hoda Moradi, Gerhard Furrer, Michael Margreth

et al.

˜The œcryosphere, Journal Year: 2024, Volume and Issue: 18(11), P. 5153 - 5171

Published: Nov. 14, 2024

Abstract. In the central Eastern Alps, an increasing number of high-altitude streams draining ice-rich permafrost display high concentrations toxic solutes, such as Al, F−, Mn, and Ni, that may strongly exceed drinking water limits. To obtain novel insights into causes for mobilization solutes to assess environmental hazard, here we present a 2-year dataset (2021, 2022) monitoring alpine stream originating from intact rock glacier located in eastern Switzerland. The includes monthly sampling discharge measurements, well continuous tracking geogenic fluxes using pressure conductivity probe. Our revealed annual up 10 t a−1 with strong seasonal variations. particular, were highest during warm summer months showed correlations hydraulic events snowmelt heavy rainfall. These likely occurred because reflects last step complicated sequence coupled processes, including (i) oxidation sulfides producing sulfuric acid promoting dissolution host rock, (ii) temporal storage long-term enrichment dissolved ice, (iii) their final climate-change-induced accelerated degradation glaciers. studied catchment, exceeded limits down altitude 1900 m a.s.l. This depicts significant hazard farmers products catchment summer, while larger populated areas further downstream is considered limited. Since glaciers reflect solute-enriched hypothesize flux measurements serve tracer study degradation.

Language: Английский

Massive mobilization of toxic elements from an intact rock glacier in the central Eastern Alps DOI Creative Commons
Hoda Moradi, Gerhard Furrer, Michael Margreth

et al.

˜The œcryosphere, Journal Year: 2024, Volume and Issue: 18(11), P. 5153 - 5171

Published: Nov. 14, 2024

Abstract. In the central Eastern Alps, an increasing number of high-altitude streams draining ice-rich permafrost display high concentrations toxic solutes, such as Al, F−, Mn, and Ni, that may strongly exceed drinking water limits. To obtain novel insights into causes for mobilization solutes to assess environmental hazard, here we present a 2-year dataset (2021, 2022) monitoring alpine stream originating from intact rock glacier located in eastern Switzerland. The includes monthly sampling discharge measurements, well continuous tracking geogenic fluxes using pressure conductivity probe. Our revealed annual up 10 t a−1 with strong seasonal variations. particular, were highest during warm summer months showed correlations hydraulic events snowmelt heavy rainfall. These likely occurred because reflects last step complicated sequence coupled processes, including (i) oxidation sulfides producing sulfuric acid promoting dissolution host rock, (ii) temporal storage long-term enrichment dissolved ice, (iii) their final climate-change-induced accelerated degradation glaciers. studied catchment, exceeded limits down altitude 1900 m a.s.l. This depicts significant hazard farmers products catchment summer, while larger populated areas further downstream is considered limited. Since glaciers reflect solute-enriched hypothesize flux measurements serve tracer study degradation.

Language: Английский

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