Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper)
Biological characteristics of dark colored material (cryoconite) collected from Canadian Arctic glaciers (Devon and Penny ice caps) are described. The cryoconite consists of mineral particles and organic matter. The amount of organic matter was 0.8-13.8% dry weight. Seven taxa of snow algae (Chlorop...
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Frontier Observational Research System for Global Change, International Arctic Research Center, University of Alaska
2001
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ftnipr:oai:nipr.repo.nii.ac.jp:00002403 2023-05-15T13:11:29+02:00 Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) Nozomu Takeuchi Shiro Kohshima Kumiko Goto-Azuma Roy M. Koerner 2001-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2403 http://id.nii.ac.jp/1291/00002403/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2403&item_no=1&attribute_id=18&file_no=1 en eng Frontier Observational Research System for Global Change, International Arctic Research Center, University of Alaska Biological Laboratory, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology National Institute of Polar Research Terrain Sciences Division, Geological Survey of Canada https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2403 http://id.nii.ac.jp/1291/00002403/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 54, 495-505(2001-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2403&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 2001 ftnipr 2022-11-12T19:43:14Z Biological characteristics of dark colored material (cryoconite) collected from Canadian Arctic glaciers (Devon and Penny ice caps) are described. The cryoconite consists of mineral particles and organic matter. The amount of organic matter was 0.8-13.8% dry weight. Seven taxa of snow algae (Chlorophyta and Cyanophyta) were observed in the cryoconite. The mineral particles, the algae, the bacteria, and amorphous organic matter formed small dark colored granules (cryoconite granules). The size of the granules was approximately 0.4mm in diameter. Microscopy of the granules revealed that the granules contain bacteria with mucus like substance, and that the surface of the granules was covered with filamentous blue-green algae. These observations suggest that the granules are formed by algal and bacterial activity on the glaciers, and that the cryoconite includes a large amount of biological products. The amount of the cryoconite per unit area on the glacier surface was generally small (mean 48g m^<-2> in dry weight). In contrast, a large amount of the cryoconite was deposited at the bottom of cryoconite holes. The small amount of cryoconite on the glacier surface means that the effect of the cryoconite on albedo reduction of the glacier surface is small. Report albedo Arctic Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Arctic |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
Biological characteristics of dark colored material (cryoconite) collected from Canadian Arctic glaciers (Devon and Penny ice caps) are described. The cryoconite consists of mineral particles and organic matter. The amount of organic matter was 0.8-13.8% dry weight. Seven taxa of snow algae (Chlorophyta and Cyanophyta) were observed in the cryoconite. The mineral particles, the algae, the bacteria, and amorphous organic matter formed small dark colored granules (cryoconite granules). The size of the granules was approximately 0.4mm in diameter. Microscopy of the granules revealed that the granules contain bacteria with mucus like substance, and that the surface of the granules was covered with filamentous blue-green algae. These observations suggest that the granules are formed by algal and bacterial activity on the glaciers, and that the cryoconite includes a large amount of biological products. The amount of the cryoconite per unit area on the glacier surface was generally small (mean 48g m^<-2> in dry weight). In contrast, a large amount of the cryoconite was deposited at the bottom of cryoconite holes. The small amount of cryoconite on the glacier surface means that the effect of the cryoconite on albedo reduction of the glacier surface is small. |
format |
Report |
author |
Nozomu Takeuchi Shiro Kohshima Kumiko Goto-Azuma Roy M. Koerner |
spellingShingle |
Nozomu Takeuchi Shiro Kohshima Kumiko Goto-Azuma Roy M. Koerner Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) |
author_facet |
Nozomu Takeuchi Shiro Kohshima Kumiko Goto-Azuma Roy M. Koerner |
author_sort |
Nozomu Takeuchi |
title |
Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) |
title_short |
Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) |
title_full |
Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) |
title_fullStr |
Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) |
title_full_unstemmed |
Biological characteristics of dark colored material (cryoconite) on Canadian Arctic glaciers (Devon and Penny ice caps) (scientific paper) |
title_sort |
biological characteristics of dark colored material (cryoconite) on canadian arctic glaciers (devon and penny ice caps) (scientific paper) |
publisher |
Frontier Observational Research System for Global Change, International Arctic Research Center, University of Alaska |
publishDate |
2001 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2403 http://id.nii.ac.jp/1291/00002403/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2403&item_no=1&attribute_id=18&file_no=1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
albedo Arctic Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2403 http://id.nii.ac.jp/1291/00002403/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 54, 495-505(2001-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2403&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766247663207972864 |