Role of mountain glaciers in the hydrological dynamics of headwater basins in the Wet Andes DOI
Elizabet Lizama, Marcelo Somos‐Valenzuela, Diego Rivera

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132413 - 132413

Published: Dec. 1, 2024

Language: Английский

On the hydrological significance of rock glaciers: A case study from Murtèl rock glacier (Engadine, eastern Swiss Alps) using below-ground energy-flux measurements, ground-ice melt observations and hydrological measurements DOI Creative Commons
Dominik Amschwand,

Seraina Tschan,

Martin Scherler

et al.

Published: April 18, 2024

Abstract. Intact rock glaciers, a permafrost landform common in high-mountain regions, are often conceptualized as (frozen) water reserves. In warming climate with slowly degrading permafrost, the large below-ground ice volumes might suggest buffering effect on summer streamflow that due to resiliency of glaciers only increases rapidly receding glaciers. this case study, we assess role and functioning active Murtèl glacier hydrological cycle its small (17 ha) periglacial unglacierized watershed located Upper Engadine (eastern Swiss Alps). Our unprecedentedly comprehensive hydro-meteorological measurements include heat flux 3–5 m thick coarse-blocky layer (AL), direct observations seasonal evolution ground-ice table, discharge isotopic signature outflow at rock-glacier front. The detailed active-layer energy water/ice balance quantifies precipitation, evaporation, snow melt, ground catchment surface outflow. stores releases over three different time scales varying magnitudes residence times: (1) Liquid storage short-term (sub-monthly) scale is permafrost-underlain coarse-debris catchment, shown by ‘flashy’ hydrograph during thaw season little sustained baseflow (<3 L min-1) dry months. (2) Seasonal accumulation melt AL substantial: Independent an budget suggests rates 1−4 mm w.e. day-1, amounting 150−300 season. comparatively cool–wet year 2021, represented ca. 13 % annual precipitation outflow, but 28 hot–dry 2022. superimposed sourced refreezing snowmelt spring (annually replenished), protracts into late (intermediate-term storage), cannot increase total yearly runoff. (3) Meltwater release from ‘old’ climate-induced degradation ≤50 yr-1 or ~ 5−10 times smaller than meltwater contribution order few overall fluxes (long-term storage). study hydrologically relevant turnover occurs addition released slow ice-rich permafrost. acts coupled thermal buffer some degree protects underlying core converting More should tell how generalisable our single-site findings are.

Language: Английский

Citations

0
Comment on egusphere-2024-844 DOI Creative Commons
Dominik Amschwand,

Seraina Tschan,

Martin Scherler

et al.

Published: May 14, 2024

Abstract. Intact rock glaciers, a permafrost landform common in high-mountain regions, are often conceptualized as (frozen) water reserves. In warming climate with slowly degrading permafrost, the large below-ground ice volumes might suggest buffering effect on summer streamflow that due to resiliency of glaciers only increases rapidly receding glaciers. this case study, we assess role and functioning active Murtèl glacier hydrological cycle its small (17 ha) periglacial unglacierized watershed located Upper Engadine (eastern Swiss Alps). Our unprecedentedly comprehensive hydro-meteorological measurements include heat flux 3–5 m thick coarse-blocky layer (AL), direct observations seasonal evolution ground-ice table, discharge isotopic signature outflow at rock-glacier front. The detailed active-layer energy water/ice balance quantifies precipitation, evaporation, snow melt, ground catchment surface outflow. stores releases over three different time scales varying magnitudes residence times: (1) Liquid storage short-term (sub-monthly) scale is permafrost-underlain coarse-debris catchment, shown by ‘flashy’ hydrograph during thaw season little sustained baseflow (<3 L min-1) dry months. (2) Seasonal accumulation melt AL substantial: Independent an budget suggests rates 1−4 mm w.e. day-1, amounting 150−300 season. comparatively cool–wet year 2021, represented ca. 13 % annual precipitation outflow, but 28 hot–dry 2022. superimposed sourced refreezing snowmelt spring (annually replenished), protracts into late (intermediate-term storage), cannot increase total yearly runoff. (3) Meltwater release from ‘old’ climate-induced degradation ≤50 yr-1 or ~ 5−10 times smaller than meltwater contribution order few overall fluxes (long-term storage). study hydrologically relevant turnover occurs addition released slow ice-rich permafrost. acts coupled thermal buffer some degree protects underlying core converting More should tell how generalisable our single-site findings are.

Language: Английский

Citations

0
Comment on egusphere-2024-844 DOI Creative Commons

Ryan Webb

Published: May 20, 2024

Abstract. Intact rock glaciers, a permafrost landform common in high-mountain regions, are often conceptualized as (frozen) water reserves. In warming climate with slowly degrading permafrost, the large below-ground ice volumes might suggest buffering effect on summer streamflow that due to resiliency of glaciers only increases rapidly receding glaciers. this case study, we assess role and functioning active Murtèl glacier hydrological cycle its small (17 ha) periglacial unglacierized watershed located Upper Engadine (eastern Swiss Alps). Our unprecedentedly comprehensive hydro-meteorological measurements include heat flux 3–5 m thick coarse-blocky layer (AL), direct observations seasonal evolution ground-ice table, discharge isotopic signature outflow at rock-glacier front. The detailed active-layer energy water/ice balance quantifies precipitation, evaporation, snow melt, ground catchment surface outflow. stores releases over three different time scales varying magnitudes residence times: (1) Liquid storage short-term (sub-monthly) scale is permafrost-underlain coarse-debris catchment, shown by ‘flashy’ hydrograph during thaw season little sustained baseflow (<3 L min-1) dry months. (2) Seasonal accumulation melt AL substantial: Independent an budget suggests rates 1−4 mm w.e. day-1, amounting 150−300 season. comparatively cool–wet year 2021, represented ca. 13 % annual precipitation outflow, but 28 hot–dry 2022. superimposed sourced refreezing snowmelt spring (annually replenished), protracts into late (intermediate-term storage), cannot increase total yearly runoff. (3) Meltwater release from ‘old’ climate-induced degradation ≤50 yr-1 or ~ 5−10 times smaller than meltwater contribution order few overall fluxes (long-term storage). study hydrologically relevant turnover occurs addition released slow ice-rich permafrost. acts coupled thermal buffer some degree protects underlying core converting More should tell how generalisable our single-site findings are.

Language: Английский

Citations

0
Factors Controlling the Water Quality of Rock Glacier Springs in European and American Mountain Ranges DOI
Thomas Wagner, Stefano Brighenti,

N. Colombo

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
Current understanding, knowledge gaps, and challenges of mountain permafrost research in the Chilean and Argentinean Andes DOI

Hans Fernández-Navarro,

Carla Tapia Baldis, Claudia Rojas

et al.

Journal of South American Earth Sciences, Journal Year: 2024, Volume and Issue: unknown, P. 105165 - 105165

Published: Sept. 1, 2024

Language: Английский

Citations

0
Glacial and periglacial geomorphology of the eastern flank of the North Patagonian Andes: Quaternary morphoclimatic evolution. DOI
Agustina Reato, Oscar A. Martínez, Alexander Cottescu

et al.

Journal of South American Earth Sciences, Journal Year: 2024, Volume and Issue: 149, P. 105211 - 105211

Published: Oct. 30, 2024

Language: Английский

Citations

0
Role of mountain glaciers in the hydrological dynamics of headwater basins in the Wet Andes DOI
Elizabet Lizama, Marcelo Somos‐Valenzuela, Diego Rivera

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132413 - 132413

Published: Dec. 1, 2024

Language: Английский

Citations

0