Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica

We report the results of a comparative analysis focusing on grain size, mineralogical composition and spectral reflectance values (400–2500 nm) of cryoconite samples collected from Jakobshavn Isbrae, West Greenland, and Canada Glacier, McMurdo Dry Valleys, Antarctica. The samples from the Greenland...

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Main Authors: Tedesco, Marco, Foreman, C. M., Anton, J., Steiner, N., Schwartzman, T.
Format: Text
Language:unknown
Published: Columbia University 2013
Subjects:
Online Access:https://dx.doi.org/10.7916/d8n016d5
https://academiccommons.columbia.edu/doi/10.7916/D8N016D5
id ftdatacite:10.7916/d8n016d5
record_format openpolar
spelling ftdatacite:10.7916/d8n016d5 2023-05-15T13:44:13+02:00 Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica Tedesco, Marco Foreman, C. M. Anton, J. Steiner, N. Schwartzman, T. 2013 https://dx.doi.org/10.7916/d8n016d5 https://academiccommons.columbia.edu/doi/10.7916/D8N016D5 unknown Columbia University https://dx.doi.org/10.3189/2013aog63a417 Cryoconite Spectral reflectance Geomorphology Reflectance Mineralogy Geology FOS Earth and related environmental sciences article-journal ScholarlyArticle Text 2013 ftdatacite https://doi.org/10.7916/d8n016d5 https://doi.org/10.3189/2013aog63a417 2022-03-10T12:27:56Z We report the results of a comparative analysis focusing on grain size, mineralogical composition and spectral reflectance values (400–2500 nm) of cryoconite samples collected from Jakobshavn Isbrae, West Greenland, and Canada Glacier, McMurdo Dry Valleys, Antarctica. The samples from the Greenland site were composed of small particles clumped into larger rounded agglomerates, while those from the site in Antarctica contained fragments of different sizes and shapes. Mineralogical analysis indicates that the samples from Jakobshavn Isbrae contained a higher percentage of quartz and albite, whereas those from Canada Glacier contained a higher percentage of amphibole, augite and biotite. Spectral measurements confirmed the primary role of organic material in reducing the reflectance over the measured spectrum. The reflectance of the samples from the Antarctic site remained low after the removal of organic matter because of the higher concentration of minerals with low reflectance. The reflectance of dried cryoconite samples in the visible region was relatively low (e.g. between ∼0.1 and ∼0.4) favouring increased absorbed solar radiation. Despite high reflectance values in the shortwave infrared region, the effect of the presence of cryoconite is negligible at infrared wavelengths where ice reflectance is low. Text Antarc* Antarctic Antarctica Canada Glacier glacier glacier* Greenland Jakobshavn McMurdo Dry Valleys DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic McMurdo Dry Valleys Canada Greenland Canada Glacier ENVELOPE(162.983,162.983,-77.617,-77.617)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Cryoconite
Spectral reflectance
Geomorphology
Reflectance
Mineralogy
Geology
FOS Earth and related environmental sciences
spellingShingle Cryoconite
Spectral reflectance
Geomorphology
Reflectance
Mineralogy
Geology
FOS Earth and related environmental sciences
Tedesco, Marco
Foreman, C. M.
Anton, J.
Steiner, N.
Schwartzman, T.
Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica
topic_facet Cryoconite
Spectral reflectance
Geomorphology
Reflectance
Mineralogy
Geology
FOS Earth and related environmental sciences
description We report the results of a comparative analysis focusing on grain size, mineralogical composition and spectral reflectance values (400–2500 nm) of cryoconite samples collected from Jakobshavn Isbrae, West Greenland, and Canada Glacier, McMurdo Dry Valleys, Antarctica. The samples from the Greenland site were composed of small particles clumped into larger rounded agglomerates, while those from the site in Antarctica contained fragments of different sizes and shapes. Mineralogical analysis indicates that the samples from Jakobshavn Isbrae contained a higher percentage of quartz and albite, whereas those from Canada Glacier contained a higher percentage of amphibole, augite and biotite. Spectral measurements confirmed the primary role of organic material in reducing the reflectance over the measured spectrum. The reflectance of the samples from the Antarctic site remained low after the removal of organic matter because of the higher concentration of minerals with low reflectance. The reflectance of dried cryoconite samples in the visible region was relatively low (e.g. between ∼0.1 and ∼0.4) favouring increased absorbed solar radiation. Despite high reflectance values in the shortwave infrared region, the effect of the presence of cryoconite is negligible at infrared wavelengths where ice reflectance is low.
format Text
author Tedesco, Marco
Foreman, C. M.
Anton, J.
Steiner, N.
Schwartzman, T.
author_facet Tedesco, Marco
Foreman, C. M.
Anton, J.
Steiner, N.
Schwartzman, T.
author_sort Tedesco, Marco
title Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica
title_short Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica
title_full Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica
title_fullStr Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica
title_full_unstemmed Comparative analysis of morphological, mineralogical and spectral properties of cryoconite in Jakobshavn Isbrae, Greenland, and Canada Glacier, Antarctica
title_sort comparative analysis of morphological, mineralogical and spectral properties of cryoconite in jakobshavn isbrae, greenland, and canada glacier, antarctica
publisher Columbia University
publishDate 2013
url https://dx.doi.org/10.7916/d8n016d5
https://academiccommons.columbia.edu/doi/10.7916/D8N016D5
long_lat ENVELOPE(162.983,162.983,-77.617,-77.617)
geographic Antarctic
The Antarctic
McMurdo Dry Valleys
Canada
Greenland
Canada Glacier
geographic_facet Antarctic
The Antarctic
McMurdo Dry Valleys
Canada
Greenland
Canada Glacier
genre Antarc*
Antarctic
Antarctica
Canada Glacier
glacier
glacier*
Greenland
Jakobshavn
McMurdo Dry Valleys
genre_facet Antarc*
Antarctic
Antarctica
Canada Glacier
glacier
glacier*
Greenland
Jakobshavn
McMurdo Dry Valleys
op_relation https://dx.doi.org/10.3189/2013aog63a417
op_doi https://doi.org/10.7916/d8n016d5
https://doi.org/10.3189/2013aog63a417
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