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Structure, Formation, and Darkening Process of Albedo-reducing Material (Cryoconite) on a Himalayan Glacier: A Granular Algal Mat Growing on the Glacier

Dark-colored material (cryoconite) covering Himalayan glaciers has been reported to greatly accelerate glacier-melting by reducing surface albedo. Structure, formation, and the darkening process of…
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Role of supraglacial ponds in the ablation process of a debris-covered glacier in the Nepal Himalayas

There are many supraglacial ponds on debris-covered glaciers in the Nepal Himalayas. The heat absorbed at the surface of a pond was estimated from heat budget observations on the Lirung Glacier in…

Optical characteristics of cryoconite (surface dust) on glaciers: the relationship between light absorbency and the property of organic matter contained in the cryoconite

  • N. Takeuchi
  • Environmental Science
    Annals of Glaciology
  • 2002
Abstract Optical characteristics of the cryoconite collected from nine glaciers in the Himalaya, Tibet and the Arctic (Canada and Svalbard) were analyzed. The spectral light reflectance (visible…
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Cryoconite: The dark biological secret of the cryosphere

Cryoconite is granular sediment found on glacier surfaces comprising both mineral and biological material. Despite long having been recognised as an important glaciological and biological phenomenon…
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Inter-Annual and Geographical Variations in the Extent of Bare Ice and Dark Ice on the Greenland Ice Sheet Derived from MODIS Satellite Images

Areas of dark ice have appeared on the Greenland ice sheet every summer in recent years. These are likely to have a great impact on the mass balance of the ice sheet because of their low albedo. We…
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The altitudinal distribution of snow algae on an Alaska glacier (Gulkana Glacier in the Alaska Range)

The altitudinal distribution of a snow algal community was investigated on an Alaska glacier (Gulkana Glacier in the Alaska Range) from 1270 to 1770 m a.s.l.. Seven species of snow and ice algae…
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3D effects of sharp boundaries at the borders of the African and Pacific Superplumes: Observation and modeling

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Climatic and atmospheric circulation pattern variability from ice-core isotope/geochemistry records (Altai, Tien Shan and Tibet)

Abstract Several firn/ice cores were recovered from the Siberian Altai (Belukha plateau), central Tien Shan (Inilchek glacier) and the Tibetan Plateau (Zuoqiupu glacier, Bomi) from 1998 to 2003. The…
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Characteristics of cryoconite holes on a Himalayan glacier, Yala Glacier Central Nepal

Cryoconite holes, water-filled cylindrical melt-holes on ice, are common features of glaciers. Morphology, distribution, stability, and organisms of cryoconite holes on a Himalayan glacier (Yala…

Optimally accurate second-order time-domain finite difference scheme for the elastic equation of motion: one-dimensional case

SUMMARY We previously derived a general criterion for optimally accurate numerical operators for the calculation of synthetic seismograms in the frequency domain (Geller & Takeuchi 1995). We then…
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