Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica
Freshwater drainage systems, fed by melting of nearby inland ice and perennial snowdrifts, exist in the south-eastern part of arid, ice-free, coastal Vestfold Hills. Most important is the complex Druzhby system. Intriguing questions arise about the conditions controlling its seasonal development and...
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Cambridge University Press (CUP)
1996
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Online Access: | http://dx.doi.org/10.1017/s0954102096000557 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102096000557 |
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crcambridgeupr:10.1017/s0954102096000557 2024-03-03T08:37:26+00:00 Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica Bronge, Christian 1996 http://dx.doi.org/10.1017/s0954102096000557 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102096000557 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 8, issue 4, page 379-388 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1996 crcambridgeupr https://doi.org/10.1017/s0954102096000557 2024-02-08T08:37:26Z Freshwater drainage systems, fed by melting of nearby inland ice and perennial snowdrifts, exist in the south-eastern part of arid, ice-free, coastal Vestfold Hills. Most important is the complex Druzhby system. Intriguing questions arise about the conditions controlling its seasonal development and about the consequences of possible changes of those conditions. A water-balance was calculated for 1990–91. The system went through four seasonal phases of which only one displayed a fully developed external drainage. Evidently, the relative duration of those phases can vary considerably from one year to another. The system depends critically on the water supply from ice-dammed Chelnok Lake, which could readily be drained by a minor retreat of Sørsdal Glacier. Exposed to excessive evaporation, the large Crooked Lake would then become internally drained and reach a new equilibrium in ∼830 years. A Crooked Lake sediment core can be interpreted as suggesting this occurred during the Holocene. The idea, inferred from striae, of a late Holocene Chelnok Glaciation reaching the northern shores of Crooked Lake is questioned. Instead, it is suggested that the Chelnok striae originate from local basal melting of the ice sheet draining southward into a deglaciated Sørsdal trough. At present, runoff is determined by opposing short and long-term climatic influences. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ice Sheet Sørsdal Glacier Cambridge University Press Vestfold Hills Vestfold Crooked Lake ENVELOPE(78.382,78.382,-68.617,-68.617) Sørsdal Glacier ENVELOPE(78.167,78.167,-68.700,-68.700) Chelnok ENVELOPE(78.367,78.367,-68.633,-68.633) Chelnok Lake ENVELOPE(78.341,78.341,-68.646,-68.646) Antarctic Science 8 4 379 388 |
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 Bronge, Christian Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Freshwater drainage systems, fed by melting of nearby inland ice and perennial snowdrifts, exist in the south-eastern part of arid, ice-free, coastal Vestfold Hills. Most important is the complex Druzhby system. Intriguing questions arise about the conditions controlling its seasonal development and about the consequences of possible changes of those conditions. A water-balance was calculated for 1990–91. The system went through four seasonal phases of which only one displayed a fully developed external drainage. Evidently, the relative duration of those phases can vary considerably from one year to another. The system depends critically on the water supply from ice-dammed Chelnok Lake, which could readily be drained by a minor retreat of Sørsdal Glacier. Exposed to excessive evaporation, the large Crooked Lake would then become internally drained and reach a new equilibrium in ∼830 years. A Crooked Lake sediment core can be interpreted as suggesting this occurred during the Holocene. The idea, inferred from striae, of a late Holocene Chelnok Glaciation reaching the northern shores of Crooked Lake is questioned. Instead, it is suggested that the Chelnok striae originate from local basal melting of the ice sheet draining southward into a deglaciated Sørsdal trough. At present, runoff is determined by opposing short and long-term climatic influences. |
format |
Article in Journal/Newspaper |
author |
Bronge, Christian |
author_facet |
Bronge, Christian |
author_sort |
Bronge, Christian |
title |
Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica |
title_short |
Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica |
title_full |
Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica |
title_fullStr |
Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica |
title_full_unstemmed |
Hydrographic and climatic changes influencing the proglacial Druzhby drainage system, Vestfold Hills, Antarctica |
title_sort |
hydrographic and climatic changes influencing the proglacial druzhby drainage system, vestfold hills, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1017/s0954102096000557 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102096000557 |
long_lat |
ENVELOPE(78.382,78.382,-68.617,-68.617) ENVELOPE(78.167,78.167,-68.700,-68.700) ENVELOPE(78.367,78.367,-68.633,-68.633) ENVELOPE(78.341,78.341,-68.646,-68.646) |
geographic |
Vestfold Hills Vestfold Crooked Lake Sørsdal Glacier Chelnok Chelnok Lake |
geographic_facet |
Vestfold Hills Vestfold Crooked Lake Sørsdal Glacier Chelnok Chelnok Lake |
genre |
Antarc* Antarctic Science Antarctica Ice Sheet Sørsdal Glacier |
genre_facet |
Antarc* Antarctic Science Antarctica Ice Sheet Sørsdal Glacier |
op_source |
Antarctic Science volume 8, issue 4, page 379-388 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102096000557 |
container_title |
Antarctic Science |
container_volume |
8 |
container_issue |
4 |
container_start_page |
379 |
op_container_end_page |
388 |
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1792498907941437440 |