Results 11 to 20 of about 1,001 (145)

Numerical Simulation of Supraglacial Debris Mobility: Implications for Ablation and Landform Genesis

Frontiers in Earth Science, 2021
Supraglacial debris does not remain fixed atop ablating ice, but can move across the ice surface as supraglacial topography evolves. This active debris movement (distinct from passive movement due to underlying ice motion) affects landform genesis as ...
Peter L. Moore
doaj   +4 more sources

Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya [PDF]

Journal of Glaciology, 2021
Rock debris covers ~30% of glacier ablation areas in the Central Himalaya and modifies the impact of atmospheric conditions on mass balance. The thermal properties of supraglacial debris are diurnally variable but remain poorly constrained for monsoon ...
Ann V. Rowan, Lindsey I. Nicholson, Duncan J. Quincey, Morgan J. Gibson, Tristram D.L. Irvine-Fynn, C. Scott Watson, Patrick Wagnon, David R. Rounce, Sarah S. Thompson, Philip R. Porter, Neil F. Glasser   +10 more
doaj   +4 more sources

Geochemical characterization of supraglacial debris via in situ and optical remote sensing methods: a case study in Khumbu Himalaya, Nepal [PDF]

The Cryosphere, 2012
Surface glacier debris samples and field spectra were collected from the ablation zones of Nepal Himalaya Ngozumpa and Khumbu glaciers in November and December 2009.
K. A. Casey, A. Kääb, D. I. Benn
doaj   +3 more sources

Representing moisture fluxes and phase changes in glacier debris cover using a reservoir approach [PDF]

The Cryosphere, 2014
Due to the complexity of treating moisture in supraglacial debris, surface energy balance models to date have neglected moisture infiltration and phase changes in the debris layer.
E. Collier, L. I. Nicholson, B. W. Brock, F. Maussion, R. Essery, A. B. G. Bush   +5 more
doaj   +2 more sources

Pond Dynamics and Supraglacial-Englacial Connectivity on Debris-Covered Lirung Glacier, Nepal [PDF]

Frontiers in Earth Science, 2017
The hydrological systems of heavily-downwasted debris-covered glaciers differ from those of clean-ice glaciers due to the hummocky surface and debris mantle of such glaciers, leading to a relatively limited understanding of drainage pathways ...
Evan S. Miles, Evan S. Miles, Jakob Steiner, Jakob Steiner, Ian Willis, Pascal Buri, Walter W. Immerzeel, Anna Chesnokova, Anna Chesnokova, Francesca Pellicciotti, Francesca Pellicciotti   +10 more
doaj   +6 more sources

Microplastic contamination of supraglacial debris differs among glaciers with different anthropic pressures

Science of the Total Environment, 2022
Microplastic (MP) contamination is ubiquitous and widespread in terrestrial and aquatic ecosystems, including remote areas. However, information on the presence and distribution of MPs in high-mountain ecosystems, including glaciers, is still limited. The present study aimed at investigating presence, spatial distribution, and patterns of contamination
Crosta A., De Felice B., Antonioli D., Chiarcos R., Perin E., Ortenzi M. A., Gazzotti S., Azzoni R. S., Fugazza D., Gianotti V., Laus M., Diolaiuti G., Pittino F., Franzetti A., Ambrosini R., Parolini M.   +15 more
exaly   +6 more sources

Provenance and transport of supraglacial debris revealed by variations in debris geochemistry on Khumbu Glacier, Nepal Himalaya

Earth Surface Processes and Landforms, 2023
AbstractThe origin of supraglacial debris covers is often conceptualised as the formation of a surface lag by melt‐out of englacial debris from slow‐moving ice, where complexity arises from feedback between debris thickness and sub‐debris ice melt. Here, we examine the origin of a debris cover from the perspective of debris provenance and changing ...
Martin P Kirkbride, Sophie C Sherriff, Ann V Rowan   +2 more
exaly   +5 more sources

Applicability of Landsat 8 data for characterizing glacier facies and supraglacial debris

International Journal of Applied Earth Observation and Geoinformation, 2015
Abstract The present work evaluates the applicability of operational land imager (OLI) and thermal infrared sensor (TIRS) on-board Landsat 8 satellite. We demonstrate an algorithm for automated mapping of glacier facies and supraglacial debris using data collected in blue, near infrared (NIR), short wave infrared (SWIR) and thermal infrared (TIR ...
Anshuman Bhardwaj, Snehmani, Lydia Sam
exaly   +2 more sources

Quantifying Spatiotemporal Changes in Supraglacial Debris Cover in Eastern Pamir from 1994 to 2024 Based on the Google Earth Engine

Remote Sensing
Supraglacial debris cover considerably influences sub-debris ablation patterns and the surface morphology of glaciers by modulating the land–atmosphere energy exchange.
Shiyin Liu, Jing Ding, Haoran Su
exaly   +3 more sources

Optimising NDWI supraglacial pond classification on Himalayan debris-covered glaciers [PDF]

Remote Sensing of Environment, 2018
The ability of medium-resolution (10–30 m) satellite imagery to delineate the size and persistence of ponds on debris-covered glaciers is a topic of recent interest as it has become apparent through the use of fine-resolution products that smaller ponds have often been neglected.
C Scott Watson, Owen KING, Evan S Miles
exaly   +3 more sources