Results 21 to 30 of about 4,434 (254)

Glacier classification from Sentinel-2 imagery using spatial-spectral attention convolutional model

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2021
Glaciers are critical components of the cryosphere and most sources of water. The Sentinel-2 imagery provides an efficient and cost-effective way for the production of inventories of glaciers.
Shuai Yan   +7 more
doaj   +1 more source

The distribution of basal motion beneath a High Arctic polythermal glacier [PDF]

open access: yes, 2003
The longitudinal pattern of surface velocity of a large, predominantly colds polythermal glacier (John Evans Glacier, Ellesmere Island, Canada) was measured over summer and winter periods.
Nienow, Peter W.   +12 more
core   +1 more source

Subglacial drainage processes at a High Arctic polythermal valley glacier [PDF]

open access: yes, 2005
Dye-tracer experiments undertaken over two summer melt seasons at polythermal John Evans Glacier, Ellesmere Island, Canada, were designed to investigate the character of the subglacial drainage system and its evolution over a melt season. In both summers,
Nienow, Peter W.   +5 more
core   +1 more source

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

open access: yesThe 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   +1 more source

Large-Scale Debris Cover Glacier Mapping Using Multisource Object-Based Image Analysis Approach

open access: yesRemote Sensing, 2022
Large-scale debris cover glacier mapping can be efficiently conducted from high spatial resolution (HSR) remote sensing imagery using object-based image analysis (OBIA), which works on a group of pixels.
Kavita V. Mitkari   +5 more
doaj   +1 more source

Multi-sensor remote sensing to map glacier debris cover in the Greater Caucasus, Georgia

open access: yesJournal of Glaciology, 2021
Global warming is causing glaciers in the Caucasus Mountains and around the world to lose mass at an accelerated pace. As a result of this rapid retreat, significant parts of the glacierized surface area can be covered with debris deposits, often making ...
Iulian-Horia Holobâcă   +8 more
doaj   +1 more source

Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya [PDF]

open access: yes, 2015
Despite the important role of supraglacial debris in ablation, knowledge of debris thickness on Himalayan glaciers is sparse. A recently developed method based on reanalysis data and thermal band satellite imagery has proved to be potentially suitable ...
Kulkarni, Anil   +13 more
core   +1 more source

Which glaciers are the largest in the world?

open access: yesJournal of Glaciology, 2023
Glacier monitoring has been internationally coordinated for more than 125 years. Despite this long history, there is no authoritative answer to the popular question: ‘Which glaciers are the largest in the world?’ Here, we present the first systematic ...
Ann Windnagel   +6 more
doaj   +1 more source

An energy-balance model for debris-covered glaciers including heat conduction through the debris layer [PDF]

open access: yes, 2010
Extensive covers of supraglacial debris are often present in glacier ablation areas, and it is essential to assess exactly how the debris affects glacier melt rates.
Brock, B.W.   +5 more
core   +1 more source

A hierarchical knowledge-based classification for glacier terrain mapping: a case study from Kolahoi Glacier, Kashmir Himalaya

open access: yesAnnals of Glaciology, 2016
A glacierized terrain comprises different land covers, and their mapping using satellite data is challenged by their spectral similarity. We propose a hierarchical knowledge-based classification (HKBC) approach for differentiation of glacier terrain ...
Aparna Shukla, Iram Ali
doaj   +1 more source

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