Results 131 to 140 of about 442 (166)

Thinning Antarctic glaciers expose high-altitude nunataks delivering more bioavailable iron to the Southern Ocean. [PDF]

Nat Commun
Winter K, Woodward J, Dunning SA, Jordan JR, Graly JA, Westoby MJ, Henley SF, Raiswell R.   +7 more
europepmc   +1 more source

Global Assessment of Supraglacial Debris‐Cover Extents [PDF]

Geophysical Research Letters, 2018
AbstractRocky debris on glacier surfaces influences ice melt rates and the response of glaciers to climate change. However, scarce data on the extent and evolution of supraglacial debris cover have so far limited its inclusion in regional to global glacier models. Here we present global data sets of supraglacial debris‐cover extents, based on Landsat 8
Noel Gorelick, Hendrik Wulf, Dirk Scherler   +2 more
exaly   +6 more sources

Supraglacial Ponds Regulate Runoff From Himalayan Debris‐Covered Glaciers [PDF]

Geophysical Research Letters, 2017
AbstractMeltwater and runoff from glaciers in High Mountain Asia is a vital freshwater resource for one‐fifth of the Earth's population. Between 13% and 36% of the region's glacierized areas exhibit surface debris cover and associated supraglacial ponds whose hydrological buffering roles remain unconstrained.
Philip Porter, Alun Hubbard, Ann V Rowan   +2 more
exaly   +7 more sources

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First evidence of microplastic contamination in the supraglacial debris of an alpine glacier

Environmental Pollution, 2019
Contamination by plastic debris has been documented in most regions of the world, but their occurrence in high mountain areas has not been investigated to date. Here we present the first report of the occurrence and amount of microplastic in any terrestrial glacier environment. In the supraglacial debris of the Forni Glacier (Italian Alps), we observed
Guglielmina Diolaiuti, Roberto Sérgio Azzoni, Roberto Ambrosini   +2 more
exaly   +4 more sources

Morphology and evolution of supraglacial hummocks on debris‐covered Himalayan glaciers [PDF]

Earth Surface Processes and Landforms, 2021
AbstractThick supraglacial debris layers often have an undulating, hummocky topography that influences the lateral transport of debris and meltwater and provides basins for supraglacial ponds. The role of ablation and other processes associated with supraglacial debris in giving rise to this hummocky topography is poorly understood.
Felix Ng, Oliver Bartlett, Ann V Rowan
exaly   +5 more sources

CARBON GAS CYCLING IN SUPRAGLACIAL DEBRIS COVERS

Geological Society of America Abstracts with Programs, 2020
<p>Debris-covered glaciers extend over 4000 km2 in the high Asian Mountains and are significant and expanding features of most of the World’s glacierized mountain ranges. Within supraglacial debris covers, a combination of fresh mechanically-weathered rock and an abundance of water and energy during melt seasons ...
Ben Brock, Grace Brown, Paul Mann, Stuart Dunning   +3 more
openaire   +1 more source

The formation of supraglacial debris covers by primary dispersal from transverse englacial debris bands

Earth Surface Processes and Landforms, 2013
ABSTRACTGlaciological controls on debris cover formation are investigated from the perspective of primary dispersal of supraglacial debris across a melting ice surface. This involves the migration of angled debris septa outcrops across a melting, thinning glacier ablation zone.
Philip Deline, Martin Kirkbride
exaly   +3 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 ...
Bryn Hubbard, Ann V Rowan, Martin Kirkbride   +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, M K Singh
exaly   +2 more sources

Characterizing the role of supraglacial debris thickness variability on underlyingice ablation

2022
<p>Projections of future climate implicate the thickening of debris-covered glaciers. Thus it becomes<br>increasingly important to consider the influences of the debris layer on glacier melt especially<br>because of the strong non-linear relationship between debris thickness and ablation rate.
Beck, Calvin, Nicholson, Lindsey, Wirbel, Anna, Simon, Thorsten   +3 more
openaire   +2 more sources