Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes
Cryoconite holes are small, water filled, cylindrical melt-holes on glacial ice surface. Cryoconite, 'cold dust,' refers to the thin layer of sediment at the hole bottom. The holes form from surficial sediment patches that absorbs more solar radiation than the surrounding ice and which pre...
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ftportlandstate:oai:pdxscholar.library.pdx.edu:geology_fac-1003 2023-05-15T15:07:41+02:00 Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes Fountain, Andrew G. Tranter, Martyn 2008-01-01T08:00:00Z application/pdf https://pdxscholar.library.pdx.edu/geology_fac/4 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1003&context=geology_fac unknown PDXScholar https://pdxscholar.library.pdx.edu/geology_fac/4 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1003&context=geology_fac Geology Faculty Publications and Presentations Glaciers -- Microbiology Glaciers -- Climatic factors -- Arctic regions Cryoconite holes -- Microbiology Geology Glaciology text 2008 ftportlandstate 2022-01-09T19:24:25Z Cryoconite holes are small, water filled, cylindrical melt-holes on glacial ice surface. Cryoconite, 'cold dust,' refers to the thin layer of sediment at the hole bottom. The holes form from surficial sediment patches that absorbs more solar radiation than the surrounding ice and which preferentially melt into the glacier forming a cylindrical water-filled hole. These holes form on the ice-covered, as opposed to snow covered, parts of glaciers world-wide, wherever there is sufficient energy for melting. Biogeochemically, cryoconite holes are interesting because the sediment is inncoculated with biologic material, a fraction of which thrives in the cryoconite environment of near-freezing waters and limited nutrient supply. The holes are thus oases for microbial life and biologically mediated chemical reactions on otherwise relatively inert glacier surfaces. Examining the chemical evolution of waters in cryoconite holes, showing how biogeochemical processes in cryoconite holes lead to increasing concentrations of dissolved organic carbon over time, which in may enhance adsorption of solar radiation by the water, aiding the development of deeper holes. If this is true, it suggests that there are a number of complex interactions between the biology, chemistry and biology of cryoconite holes, which act in concert to maintain life on glacier surfaces. Text Arctic Portland State University: PDXScholar Arctic |
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Open Polar |
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Portland State University: PDXScholar |
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ftportlandstate |
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unknown |
topic |
Glaciers -- Microbiology Glaciers -- Climatic factors -- Arctic regions Cryoconite holes -- Microbiology Geology Glaciology |
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Glaciers -- Microbiology Glaciers -- Climatic factors -- Arctic regions Cryoconite holes -- Microbiology Geology Glaciology Fountain, Andrew G. Tranter, Martyn Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes |
topic_facet |
Glaciers -- Microbiology Glaciers -- Climatic factors -- Arctic regions Cryoconite holes -- Microbiology Geology Glaciology |
description |
Cryoconite holes are small, water filled, cylindrical melt-holes on glacial ice surface. Cryoconite, 'cold dust,' refers to the thin layer of sediment at the hole bottom. The holes form from surficial sediment patches that absorbs more solar radiation than the surrounding ice and which preferentially melt into the glacier forming a cylindrical water-filled hole. These holes form on the ice-covered, as opposed to snow covered, parts of glaciers world-wide, wherever there is sufficient energy for melting. Biogeochemically, cryoconite holes are interesting because the sediment is inncoculated with biologic material, a fraction of which thrives in the cryoconite environment of near-freezing waters and limited nutrient supply. The holes are thus oases for microbial life and biologically mediated chemical reactions on otherwise relatively inert glacier surfaces. Examining the chemical evolution of waters in cryoconite holes, showing how biogeochemical processes in cryoconite holes lead to increasing concentrations of dissolved organic carbon over time, which in may enhance adsorption of solar radiation by the water, aiding the development of deeper holes. If this is true, it suggests that there are a number of complex interactions between the biology, chemistry and biology of cryoconite holes, which act in concert to maintain life on glacier surfaces. |
format |
Text |
author |
Fountain, Andrew G. Tranter, Martyn |
author_facet |
Fountain, Andrew G. Tranter, Martyn |
author_sort |
Fountain, Andrew G. |
title |
Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes |
title_short |
Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes |
title_full |
Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes |
title_fullStr |
Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes |
title_full_unstemmed |
Introduction to Special Section on Microcosms in Ice: The Biogeochemistry of Cryoconite Holes |
title_sort |
introduction to special section on microcosms in ice: the biogeochemistry of cryoconite holes |
publisher |
PDXScholar |
publishDate |
2008 |
url |
https://pdxscholar.library.pdx.edu/geology_fac/4 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1003&context=geology_fac |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geology Faculty Publications and Presentations |
op_relation |
https://pdxscholar.library.pdx.edu/geology_fac/4 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=1003&context=geology_fac |
_version_ |
1766339135337922560 |