scholarly journals Application of nonlinear colour enhancement on transparencies for interpretation of glacier surface characteristics

1992 ◽  
Vol 16 ◽  
pp. 190-192
Author(s):  
Cao Meisheng ◽  
Mi Desheng ◽  
Pu Yinbin ◽  
Liu Jinghaung
Keyword(s):  
Surface Characteristics ◽  
False Colour Composite ◽  
High Contrast ◽  
Glacier Surface ◽  
Ice Surface ◽  
Grey Scale ◽  
Scale Range ◽  
Colour Composite ◽  
Channel Image ◽  
False Colour

According to the analysis of grey scale range on MSS-4, -5, -6 and -7 channel image films for five snow-ice categories on glacier surface, the grey scale among snow, bare ice, ice pinnacle, moraine-covered ice surface and gully bed has been spread nonlinearly by using duplicative processing on high-contrast film. As a result of the rescaling of grey levels, the colour differences of morphological features of Rongbu Glacier in the Qpmolangma region have been increased on false colour composite photography. It is also shown that using MSS-6 to composite false colour images compared to MSS-5 will supply more information for the interpretation of the glacier area.

scholarly journals Application of nonlinear colour enhancement on transparencies for interpretation of glacier surface characteristics

1992 ◽  
Vol 16 ◽  
pp. 190-192
Author(s):  
Cao Meisheng ◽  
Mi Desheng ◽  
Pu Yinbin ◽  
Liu Jinghaung
Keyword(s):  
Surface Characteristics ◽  
False Colour Composite ◽  
High Contrast ◽  
Glacier Surface ◽  
Ice Surface ◽  
Grey Scale ◽  
Scale Range ◽  
Colour Composite ◽  
Channel Image ◽  
False Colour

According to the analysis of grey scale range on MSS-4, -5, -6 and -7 channel image films for five snow-ice categories on glacier surface, the grey scale among snow, bare ice, ice pinnacle, moraine-covered ice surface and gully bed has been spread nonlinearly by using duplicative processing on high-contrast film. As a result of the rescaling of grey levels, the colour differences of morphological features of Rongbu Glacier in the Qpmolangma region have been increased on false colour composite photography. It is also shown that using MSS-6 to composite false colour images compared to MSS-5 will supply more information for the interpretation of the glacier area.

A technique for generating natural colour images from false colour composite images

2006 ◽  
Vol 27 (14) ◽  
pp. 2977-2989 ◽  
Author(s):  
S. K. Patra ◽  
Manish Shekher ◽  
S. S. Solanki ◽  
R. Ramachandran ◽  
R. Krishnan
Keyword(s):  
False Colour Composite ◽  
Colour Composite ◽  
False Colour

scholarly journals Land-use Mapping by Satellite Imagery

Geografie ◽  
1993 ◽  
Vol 98 (3) ◽  
pp. 170-178
Author(s):  
Miroslav Koželuh
Keyword(s):  
Land Use ◽  
Satellite Imagery ◽  
Mapping Method ◽  
False Colour Composite ◽  
Landsat Tm ◽  
Visual Interpretation ◽  
Southern Moravia ◽  
Colour Composite ◽  
False Colour ◽  
Land Use Maps

The land-use mapping method based on the interpretation of satellite imagery is described. Out of various processes applied for obtaining the information on parcelation and thematic contents of the land-use map, the visual interpretation of multispectral false colour composite (FCC) of LANDSAT TM was used. The practical applicability of this method has been verified by the construction of land-use maps on the scales 1 : 50 000 and 1 : 200 000 on the territory of Southern Moravia.

Color models used for the visual interpretation of satellite data

2021 ◽  
Vol 5 ◽  
pp. 44-51
Author(s):  
Georgi Jelev
Keyword(s):  
Satellite Imagery ◽  
False Colour Composite ◽  
Earth Surface ◽  
Visual Interpretation ◽  
Composite Image ◽  
Spectral Bands ◽  
The Earth ◽  
Different Types ◽  
Colour Composite ◽  
False Colour

This study presents the possibilities for using different colour models for visual interpretation of satellite imagery. Using the RGB model to visualise different spectral bands as a false colour composite image make it possible for different types of objects and features on the Earth surface to be highlighted and easily discerned based on their specific colour. Examples are shown based on satellite imagery from several free sources, e.g. the USGS’s Earth Explorer, the ESA’s Copernicus Open Access Hub, etc.

scholarly journals Application of a mass-balance model to a Himalayan glacier

1999 ◽  
Vol 45 (151) ◽  
pp. 559-567 ◽  
Author(s):  
Rijan Bhakta Kayastha ◽  
Tetsuo Ohata ◽  
Yutaka Ageta
Keyword(s):  
Mass Balance ◽  
Surface Albedo ◽  
Balance Model ◽  
Mass Balance Model ◽  
Mass Balances ◽  
Climatic Parameters ◽  
Glacier Surface ◽  
Temperature And Precipitation ◽  
Ice Surface ◽  
Good Agreement

AbstractA mass-balance model based on the energy balance at the snow or ice surface is formulated, with particular attention paid to processes affecting absorption of radiation. The model is applied to a small glacier, Glacier AX010 in the Nepalese Himalaya, and tests of its mass-balance sensitivity to input and climatic parameters are carried out. Calculated and observed area-averaged mass balances of the glacier during summer 1978 (June-September) show good agreement, namely -0.44 and -0.46 m w.e., respectively.Results show the mass balance is strongly sensitive to snow or ice albedo, to the effects of screening by surrounding mountain walls, to areal variations in multiple reflection between clouds and the glacier surface, and to thin snow covers which alter the surface albedo. In tests of the sensitivity of the mass balance to seasonal values of climatic parameters, the mass balance is found to be strongly sensitive to summer air temperature and precipitation but only weakly sensitive to relative humidity.

scholarly journals Current glacier recession causes significant rockfall increase: The immediate paraglacial response of deglaciating cirque walls

2020 ◽  
Author(s):  
Ingo Hartmeyer ◽  
Robert Delleske ◽  
Markus Keuschnig ◽  
Michael Krautblatter ◽  
Andreas Lang ◽  
...  
Keyword(s):  
Minor Effect ◽  
European Alps ◽  
Atmospheric Conditions ◽  
Glacier Surface ◽  
Terrestrial Lidar ◽  
Physical Weathering ◽  
Ice Surface ◽  
Recent Climate ◽  
Ample Supply ◽  
A Minor

Abstract. In the European Alps almost half the glacier volume disappeared over the past 150 years. The loss is reflected in glacier retreat and ice surface lowering even at high altitude. In steep glacial cirques surface lowering exposes rock to atmospheric conditions for the very first time in many millennia. Instability of rockwalls has long been identified as one of the direct consequences of deglaciation, but so far cirque-wide quantification of rockfall at high-resolution is missing. Based on terrestrial LiDAR a rockfall inventory for the permafrost-affected rockwalls of two rapidly deglaciating cirques in the Central Alps of Austria (Kitzsteinhorn) is established. Over six-years (2011–2017) 78 rockwall scans were acquired to generate data of high spatial and temporal resolution. 632 rockfalls were registered ranging from 0.003 to 879.4 m³, mainly originating from pre-existing structural rock weaknesses. 60 % of the rockfall volume detached from less than ten vertical meters above the glacier surface, indicating enhanced rockfall activity over tens of years following deglaciation. Debuttressing seems to play a minor effect only. Rather, preconditioning is assumed to start inside the Randkluft (gap between cirque wall and glacier) where sustained freezing and ample supply of liquid water likely cause enhanced physical weathering and high plucking stresses. Following deglaciation, pronounced thermomechanical strain is induced and an active layer penetrates into the formerly perennially frozen bedrock. These factors likely cause the observed paraglacial rockfall increase close to the glacier surface. This paper presents the most extensive dataset of high-alpine rockfall to date and the first systematic documentation of a cirque-wide erosion response of glaciated rockwalls to recent climate warming.

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