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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Columbia University
2013
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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) |
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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 |
_version_ |
1766198817679474688 |