Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland
Cryoconite holes are water-filled cylindrical holes formed on ablation ice surfaces and commonly observed on glaciers worldwide. Temporal changes of cryoconite holes characteristically <5 cm in diameter were monitored with a time-lapse interval camera over 15 d during the melting season on Qaanaa...
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Cambridge University Press
2018
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ftdoajarticles:oai:doaj.org/article:5ece8e17581d4ccaba9c3c0c2afd7731 2023-05-15T13:29:36+02:00 Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland Nozomu Takeuchi Ryutaro Sakaki Jun Uetake Naoko Nagatsuka Rigen Shimada Masashi Niwano Teruo Aoki 2018-12-01T00:00:00Z https://doi.org/10.1017/aog.2018.19 https://doaj.org/article/5ece8e17581d4ccaba9c3c0c2afd7731 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305518000198/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2018.19 0260-3055 1727-5644 https://doaj.org/article/5ece8e17581d4ccaba9c3c0c2afd7731 Annals of Glaciology, Vol 59, Pp 21-30 (2018) energy balance glacier ablation phenomena ice biology melt-surface microbiology Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/aog.2018.19 2023-03-12T01:31:55Z Cryoconite holes are water-filled cylindrical holes formed on ablation ice surfaces and commonly observed on glaciers worldwide. Temporal changes of cryoconite holes characteristically <5 cm in diameter were monitored with a time-lapse interval camera over 15 d during the melting season on Qaanaaq Glacier in northwest Greenland. The holes drastically changed their dimensions and synchronously collapsed twice during the study period. When the holes collapsed, the coverage of cryoconite on the ice surface increased from 1.0 to 3.5% in the field of view of the camera, and then decreased again to 0.4% after the holes reformed. Comparison with meteorological data showed that the collapses occurred in cloudy and rainy or windy weather conditions, corresponding to low shortwave solar radiation (68–126 W m−2, 40–55% of the incoming flux). In contrast, holes developed in sunny conditions correspond to high solar radiation (186–278 W m−2, 63–88%). Results suggest that the dimensions of holes drastically changed depending on the weather conditions and that frequent cloudy, warm and windy conditions would cause a decay of holes and weathering crust, inducing an increase in the cryoconite coverage on the ice, consequently darkening the glacier surface. Article in Journal/Newspaper Annals of Glaciology glacier Greenland Qaanaaq Directory of Open Access Journals: DOAJ Articles Greenland Qaanaaq ENVELOPE(-69.232,-69.232,77.467,77.467) Annals of Glaciology 59 77 21 30 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
energy balance glacier ablation phenomena ice biology melt-surface microbiology Meteorology. Climatology QC851-999 |
spellingShingle |
energy balance glacier ablation phenomena ice biology melt-surface microbiology Meteorology. Climatology QC851-999 Nozomu Takeuchi Ryutaro Sakaki Jun Uetake Naoko Nagatsuka Rigen Shimada Masashi Niwano Teruo Aoki Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland |
topic_facet |
energy balance glacier ablation phenomena ice biology melt-surface microbiology Meteorology. Climatology QC851-999 |
description |
Cryoconite holes are water-filled cylindrical holes formed on ablation ice surfaces and commonly observed on glaciers worldwide. Temporal changes of cryoconite holes characteristically <5 cm in diameter were monitored with a time-lapse interval camera over 15 d during the melting season on Qaanaaq Glacier in northwest Greenland. The holes drastically changed their dimensions and synchronously collapsed twice during the study period. When the holes collapsed, the coverage of cryoconite on the ice surface increased from 1.0 to 3.5% in the field of view of the camera, and then decreased again to 0.4% after the holes reformed. Comparison with meteorological data showed that the collapses occurred in cloudy and rainy or windy weather conditions, corresponding to low shortwave solar radiation (68–126 W m−2, 40–55% of the incoming flux). In contrast, holes developed in sunny conditions correspond to high solar radiation (186–278 W m−2, 63–88%). Results suggest that the dimensions of holes drastically changed depending on the weather conditions and that frequent cloudy, warm and windy conditions would cause a decay of holes and weathering crust, inducing an increase in the cryoconite coverage on the ice, consequently darkening the glacier surface. |
format |
Article in Journal/Newspaper |
author |
Nozomu Takeuchi Ryutaro Sakaki Jun Uetake Naoko Nagatsuka Rigen Shimada Masashi Niwano Teruo Aoki |
author_facet |
Nozomu Takeuchi Ryutaro Sakaki Jun Uetake Naoko Nagatsuka Rigen Shimada Masashi Niwano Teruo Aoki |
author_sort |
Nozomu Takeuchi |
title |
Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland |
title_short |
Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland |
title_full |
Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland |
title_fullStr |
Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland |
title_full_unstemmed |
Temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of Qaanaaq Glacier in northwest Greenland |
title_sort |
temporal variations of cryoconite holes and cryoconite coverage on the ablation ice surface of qaanaaq glacier in northwest greenland |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/aog.2018.19 https://doaj.org/article/5ece8e17581d4ccaba9c3c0c2afd7731 |
long_lat |
ENVELOPE(-69.232,-69.232,77.467,77.467) |
geographic |
Greenland Qaanaaq |
geographic_facet |
Greenland Qaanaaq |
genre |
Annals of Glaciology glacier Greenland Qaanaaq |
genre_facet |
Annals of Glaciology glacier Greenland Qaanaaq |
op_source |
Annals of Glaciology, Vol 59, Pp 21-30 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305518000198/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2018.19 0260-3055 1727-5644 https://doaj.org/article/5ece8e17581d4ccaba9c3c0c2afd7731 |
op_doi |
https://doi.org/10.1017/aog.2018.19 |
container_title |
Annals of Glaciology |
container_volume |
59 |
container_issue |
77 |
container_start_page |
21 |
op_container_end_page |
30 |
_version_ |
1766001449661104128 |