Structure and life cycle of supraglacial lakes in Dronning Maud Land
Abstract Supraglacial lakes form in Antarctic blue ice regions from penetration of solar radiation into the ice in summer. Three lakes were mapped for their structure in summers 2004–05 and 2010–11 in western Dronning Maud Land, and one was also examined for the radiation budget. The lake body consi...
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crcambridgeupr:10.1017/s0954102012001009 2024-03-03T08:37:31+00:00 Structure and life cycle of supraglacial lakes in Dronning Maud Land Leppäranta, Matti Järvinen, Onni Mattila, Olli-Pekka 2012 http://dx.doi.org/10.1017/s0954102012001009 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012001009 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 25, issue 3, page 457-467 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2012 crcambridgeupr https://doi.org/10.1017/s0954102012001009 2024-02-08T08:44:04Z Abstract Supraglacial lakes form in Antarctic blue ice regions from penetration of solar radiation into the ice in summer. Three lakes were mapped for their structure in summers 2004–05 and 2010–11 in western Dronning Maud Land, and one was also examined for the radiation budget. The lake body consisted of two layers, each ∼1 m thick: an upper layer with a thin ice layer on top and main body of liquid water, and a lower layer containing slush and hard ice sub-layers. A sediment-rich slush pocket was found at the bottom. Hydraulic conductivity of the lake body was 0.25–30 cm s -1 depending on the stage of evolution, with 6.3 cm s -1 for closely packed slush. Albedo of the lake was 0.4–0.6 and light attenuation coefficient was 0.5–0.7 m -1 . The formation and the depth scale of the lakes are determined by the light attenuation distance and thermal diffusion coefficient, limiting the growth to less than about 1.5 m in one summer. The potential winter growth is more and thus the lakes freeze up in winter in the present climatic conditions. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Dronning Maud Land Cambridge University Press Antarctic Dronning Maud Land Antarctic Science 25 3 457 467 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Leppäranta, Matti Järvinen, Onni Mattila, Olli-Pekka Structure and life cycle of supraglacial lakes in Dronning Maud Land |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Supraglacial lakes form in Antarctic blue ice regions from penetration of solar radiation into the ice in summer. Three lakes were mapped for their structure in summers 2004–05 and 2010–11 in western Dronning Maud Land, and one was also examined for the radiation budget. The lake body consisted of two layers, each ∼1 m thick: an upper layer with a thin ice layer on top and main body of liquid water, and a lower layer containing slush and hard ice sub-layers. A sediment-rich slush pocket was found at the bottom. Hydraulic conductivity of the lake body was 0.25–30 cm s -1 depending on the stage of evolution, with 6.3 cm s -1 for closely packed slush. Albedo of the lake was 0.4–0.6 and light attenuation coefficient was 0.5–0.7 m -1 . The formation and the depth scale of the lakes are determined by the light attenuation distance and thermal diffusion coefficient, limiting the growth to less than about 1.5 m in one summer. The potential winter growth is more and thus the lakes freeze up in winter in the present climatic conditions. |
format |
Article in Journal/Newspaper |
author |
Leppäranta, Matti Järvinen, Onni Mattila, Olli-Pekka |
author_facet |
Leppäranta, Matti Järvinen, Onni Mattila, Olli-Pekka |
author_sort |
Leppäranta, Matti |
title |
Structure and life cycle of supraglacial lakes in Dronning Maud Land |
title_short |
Structure and life cycle of supraglacial lakes in Dronning Maud Land |
title_full |
Structure and life cycle of supraglacial lakes in Dronning Maud Land |
title_fullStr |
Structure and life cycle of supraglacial lakes in Dronning Maud Land |
title_full_unstemmed |
Structure and life cycle of supraglacial lakes in Dronning Maud Land |
title_sort |
structure and life cycle of supraglacial lakes in dronning maud land |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s0954102012001009 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012001009 |
geographic |
Antarctic Dronning Maud Land |
geographic_facet |
Antarctic Dronning Maud Land |
genre |
Antarc* Antarctic Antarctic Science Dronning Maud Land |
genre_facet |
Antarc* Antarctic Antarctic Science Dronning Maud Land |
op_source |
Antarctic Science volume 25, issue 3, page 457-467 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102012001009 |
container_title |
Antarctic Science |
container_volume |
25 |
container_issue |
3 |
container_start_page |
457 |
op_container_end_page |
467 |
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1792499435628920832 |