Reply on RC1 DOI Creative Commons
Landon J. S. Halloran

Опубликована: Авг. 27, 2024

Abstract. Rock glaciers play a vital role in the hydrological functioning of many alpine catchments. Here, we investigate seasonal and daily freeze-thaw cycles previously undocumented Canfinal rock glacier (RG) located Val d'Ursé catchment (Bernina Range, Switzerland) RG's influence on dynamics hydrogeological system. We combine digital image correlation techniques, geochemical isotopic analyses, time-series analysis, monitoring to understand An acceleration RG creep since 1990 has occurred, with most active regions exhibiting horizontal velocities ~1 m/yr. Distinct signatures springs influenced by discharge reflect contrasting temporally-variable groundwater mixing ratios. A novel application frequency-domain analysis air temperature spring electrical conductivity enables quantitative understanding thaw subsurface flow dynamics. gradual decrease time-lag between maximum EC minimum, caused dilution from ice melt, is observed over snow-free period, implying progressively shorter residence times. Through our multi-method approach, develop conceptual models for RG-influenced systems time-scales.

Язык: Английский

Massive mobilization of toxic elements from an intact rock glacier in the Central Eastern Alps: insights into ice melt dynamics DOI Creative Commons
Hoda Moradi, Gerhard Furrer, Michael Margreth

и другие.

Опубликована: Апрель 12, 2024

Abstract. In the Central Eastern Alps, an increasing number of high-altitude streams display high concentrations toxic solutes such as Al, F-, Mn, and Ni that may strongly exceed drinking water limits. Previous studies have shown these elements are mobilized from rock glaciers occurring at origin streams. This is caused by weathering pyrite producing sulfuric acid therefore promoting leaching crystalline host rocks. After mobilization, temporally stored enriched in glacier ice. Today, climate-change-induced accelerated melting thus leads to a quick focused export summer when ice melt rates high. The temporal storage opens up opportunity use strong chemical signal track dynamics identify governing processes controlling melt. To test this assess consequences on streamwater quality, here we present two-year dataset (2021, 2022) monitoring high-alpine stream originating intact located Switzerland. includes monthly sampling discharge measurements outlet, well continuous tracking geogenic fluxes using pressure conductivity probe. Our revealed annual with seasonal variation, whereby were highest during warm months. 2021, several tons each, which remarkable given area covers only about 40’000 m2. Interestingly, 2022 30 % lower despite record-high temperatures. A similar difference was observed for recorded two years. suggests both controlled amount snowmelt precipitation infiltrating into system. dry weather low likely lead compared snow height above average. Nevertheless, years degradation significantly contributed downhill stream. Based aspects, conceptual models accumulation their driven mobilization degradation. Finally, argue solute exported promising future research direction obtaining more reliable estimates glaciers.

Язык: Английский

Процитировано

1
The influence of atmospheric deposition and climate change driven catchment internal processes on the recovery from acidification of high-altitude Alpine lakes DOI
Sandra Steingruber

The Science of The Total Environment, Год журнала: 2024, Номер 930, С. 172699 - 172699

Опубликована: Апрель 25, 2024

Язык: Английский

Процитировано

1
Cryosphere and land cover influence on stream water quality in Central Asia's glacierized catchments DOI
Andrew J. Wade, Vadim Yapiyev, Maria Shahgedanova

и другие.

The Science of The Total Environment, Год журнала: 2024, Номер 939, С. 173525 - 173525

Опубликована: Май 27, 2024

Язык: Английский

Процитировано

1
Ecological “Windows of opportunity” influence biofilm prokaryotic diversity differently in glacial and non-glacial Alpine streams DOI
Monica Tolotti, Stefano Brighenti, Maria Cristina Bruno

и другие.

The Science of The Total Environment, Год журнала: 2024, Номер 944, С. 173826 - 173826

Опубликована: Июнь 12, 2024

Язык: Английский

Процитировано

1
Permafrost Distribution in the Southern Carpathians, Romania, Derived From Machine Learning Modeling DOI Creative Commons
Răzvan Popescu, Simon Filhol, Bernd Etzelmüller

и другие.

Permafrost and Periglacial Processes, Год журнала: 2024, Номер 35(3), С. 243 - 261

Опубликована: Июнь 28, 2024

ABSTRACT Computer modeling of sporadic and isolated patches mountain permafrost distribution is difficult to implement without overestimating it. The main challenge determine the very areas where criteria for maintenance are met. This paper aims in Southern Carpathians (SC), a typical marginal periglacial range. For this purpose, collection 883 bottom temperature late winter snow cover (BTS) points was used as proxy presence or absence order train several machine learning models. performances each model were evaluated with AUC varying between 0.99 Maxent 0.74 K‐nearest neighbors most models (five) exhibiting values 0.82 0.86. Other tests such confusion matrices, sensitivity analyses, data shuffling, size reduction indicated that Maxent, AdaBoost, support vector offered best results while logistic regression, neural network, gradient boosting exhibited rather poor distributions. final ensemble median total area 19.2 km 2 occupying 1%–9% alpine studied massifs. NDVI proved crucial prediction because it allows delimiting debris surfaces probable.

Язык: Английский

Процитировано

1
Effects of deforestation on dissolved organic carbon and nitrate in catchment stream water revealed by wavelet analysis DOI Creative Commons

Kerri-Leigh Robinson,

Heye Bogena, Qiqi Wang

и другие.

Frontiers in Water, Год журнала: 2022, Номер 4

Опубликована: Ноя. 10, 2022

Deforestation can lead to an increase in the availability of nutrients soil and, turn, have impact on quality water receiving bodies. This study assesses deforestation by evaluating in-stream concentrations dissolved organic carbon (DOC) and nitrate, their internal relationship, those with stream discharge Wüstebach headwater catchment (Germany). has monitored associated environmental parameters for over a decade as part TERENO initiative. Additionally, there is paired undisturbed forested that serves reference stream. Our approach included more advanced correlation analysis, namely wavelet assists determining changes lag time between variables interest different scales. found after deforestation, was immediate DOC concentrations, followed nitrate ~1 year later. Overall, mean concentration increased, decreased across post-deforestation. Elevated nutrient levels peaked around 2 3 years clear-cutting, returned pre-deforestation ~5 years. The had no influence anti-correlation nitrate. However, both compounds likely altered due increased result deforestation. Wavelet coherence analysis revealed “underlying” changing strengths directions main correlations DOC, scales resulting from severe forest management interventions (here deforestation). information provides new valuable insights decision making into such interventions.

Язык: Английский

Процитировано

7
Using a non-invasive multiple-method approach to characterize rock glaciers in the periglacial critical zone: An example from the San Juan Mountains, Colorado DOI
Raquel Granados-Aguilar,

John R. Giardino

Geomorphology, Год журнала: 2023, Номер 425, С. 108585 - 108585

Опубликована: Янв. 13, 2023

Язык: Английский

Процитировано

3
Comment on egusphere-2024-789 DOI Creative Commons
Hoda Moradi, Gerhard Furrer, Michael Margreth

и другие.

Опубликована: Май 9, 2024

Abstract. In the Central Eastern Alps, an increasing number of high-altitude streams display high concentrations toxic solutes such as Al, F-, Mn, and Ni that may strongly exceed drinking water limits. Previous studies have shown these elements are mobilized from rock glaciers occurring at origin streams. This is caused by weathering pyrite producing sulfuric acid therefore promoting leaching crystalline host rocks. After mobilization, temporally stored enriched in glacier ice. Today, climate-change-induced accelerated melting thus leads to a quick focused export summer when ice melt rates high. The temporal storage opens up opportunity use strong chemical signal track dynamics identify governing processes controlling melt. To test this assess consequences on streamwater quality, here we present two-year dataset (2021, 2022) monitoring high-alpine stream originating intact located Switzerland. includes monthly sampling discharge measurements outlet, well continuous tracking geogenic fluxes using pressure conductivity probe. Our revealed annual with seasonal variation, whereby were highest during warm months. 2021, several tons each, which remarkable given area covers only about 40’000 m2. Interestingly, 2022 30 % lower despite record-high temperatures. A similar difference was observed for recorded two years. suggests both controlled amount snowmelt precipitation infiltrating into system. dry weather low likely lead compared snow height above average. Nevertheless, years degradation significantly contributed downhill stream. Based aspects, conceptual models accumulation their driven mobilization degradation. Finally, argue solute exported promising future research direction obtaining more reliable estimates glaciers.

Язык: Английский

Процитировано

0
Comment on egusphere-2024-789 DOI Creative Commons

Stefano Brighenti

Опубликована: Май 9, 2024

Abstract. In the Central Eastern Alps, an increasing number of high-altitude streams display high concentrations toxic solutes such as Al, F-, Mn, and Ni that may strongly exceed drinking water limits. Previous studies have shown these elements are mobilized from rock glaciers occurring at origin streams. This is caused by weathering pyrite producing sulfuric acid therefore promoting leaching crystalline host rocks. After mobilization, temporally stored enriched in glacier ice. Today, climate-change-induced accelerated melting thus leads to a quick focused export summer when ice melt rates high. The temporal storage opens up opportunity use strong chemical signal track dynamics identify governing processes controlling melt. To test this assess consequences on streamwater quality, here we present two-year dataset (2021, 2022) monitoring high-alpine stream originating intact located Switzerland. includes monthly sampling discharge measurements outlet, well continuous tracking geogenic fluxes using pressure conductivity probe. Our revealed annual with seasonal variation, whereby were highest during warm months. 2021, several tons each, which remarkable given area covers only about 40’000 m2. Interestingly, 2022 30 % lower despite record-high temperatures. A similar difference was observed for recorded two years. suggests both controlled amount snowmelt precipitation infiltrating into system. dry weather low likely lead compared snow height above average. Nevertheless, years degradation significantly contributed downhill stream. Based aspects, conceptual models accumulation their driven mobilization degradation. Finally, argue solute exported promising future research direction obtaining more reliable estimates glaciers.

Язык: Английский

Процитировано

0
Seasonal and diurnal freeze-thaw dynamics of a rock glacier and their impacts on mixing and solute transport DOI Creative Commons

Cyprien Louis,

Landon J. S. Halloran, Clément Roques

и другие.

Опубликована: Май 14, 2024

Abstract. Rock glaciers play a vital role in the hydrological functioning of many alpine catchments. Here, we investigate seasonal and daily freeze-thaw cycles previously undocumented Canfinal rock glacier (RG) located Val d'Ursé catchment (Bernina Range, Switzerland) RG's influence on dynamics hydrogeological system. We combine digital image correlation techniques, geochemical isotopic analyses, time-series analysis, monitoring to understand An acceleration RG creep since 1990 has occurred, with most active regions exhibiting horizontal velocities ~1 m/yr. Distinct signatures springs influenced by discharge reflect contrasting temporally-variable groundwater mixing ratios. A novel application frequency-domain analysis air temperature spring electrical conductivity enables quantitative understanding thaw subsurface flow dynamics. gradual decrease time-lag between maximum EC minimum, caused dilution from ice melt, is observed over snow-free period, implying progressively shorter residence times. Through our multi-method approach, develop conceptual models for RG-influenced systems time-scales.

Язык: Английский

Процитировано

0