Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change
Results are reported from 10 years of ice-thickness measurements at perennially ice-covered Lake Hoare in southern Victoria Land, Antarctica. The ice cover of this lake had been thinning steadily at a rate exceeding 20 cm/yr during the last decade but seems to have recently stabilized at a thickness...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19920045847 2023-05-15T14:03:21+02:00 Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change Wharton, Robert A., Jr. Mckay, Christopher P. Clow, Gary D. Andersen, Dale T. Simmons, George M., Jr. Love, F. G. Unclassified, Unlimited, Publicly available Mar 15, 1992 http://ntrs.nasa.gov/search.jsp?R=19920045847 unknown http://ntrs.nasa.gov/search.jsp?R=19920045847 Accession ID: 92A28471 Copyright Other Sources 46 Journal of Geophysical Research; 97; C3, M; 3503-351 1992 ftnasantrs 2012-02-15T19:30:34Z Results are reported from 10 years of ice-thickness measurements at perennially ice-covered Lake Hoare in southern Victoria Land, Antarctica. The ice cover of this lake had been thinning steadily at a rate exceeding 20 cm/yr during the last decade but seems to have recently stabilized at a thickness of 3.3 m. Data concerning lake level and degree-days above freezing are presented to show the relationship between peak summer temperatures and the volume of glacier-derived meltwater entering Lake Hoare each summer. From these latter data it is inferred that peak summer temperatures have been above 0 C for a progressively longer period of time each year since 1972. Possible explanations for the thinning of the lake ice are considered. The thickness of the ice cover is determined by the balance between freezing during the winter and ablation that occurs all year but maximizes in summer. It is suggested that the term most likely responsible for the change in the ice cover thickness at Lake Hoare is the extent of summer melting, consistent with the rising lake levels. Other/Unknown Material Antarc* Antarctica Victoria Land NASA Technical Reports Server (NTRS) Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Lake Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Victoria Land |
institution |
Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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46 |
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46 Wharton, Robert A., Jr. Mckay, Christopher P. Clow, Gary D. Andersen, Dale T. Simmons, George M., Jr. Love, F. G. Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change |
topic_facet |
46 |
description |
Results are reported from 10 years of ice-thickness measurements at perennially ice-covered Lake Hoare in southern Victoria Land, Antarctica. The ice cover of this lake had been thinning steadily at a rate exceeding 20 cm/yr during the last decade but seems to have recently stabilized at a thickness of 3.3 m. Data concerning lake level and degree-days above freezing are presented to show the relationship between peak summer temperatures and the volume of glacier-derived meltwater entering Lake Hoare each summer. From these latter data it is inferred that peak summer temperatures have been above 0 C for a progressively longer period of time each year since 1972. Possible explanations for the thinning of the lake ice are considered. The thickness of the ice cover is determined by the balance between freezing during the winter and ablation that occurs all year but maximizes in summer. It is suggested that the term most likely responsible for the change in the ice cover thickness at Lake Hoare is the extent of summer melting, consistent with the rising lake levels. |
format |
Other/Unknown Material |
author |
Wharton, Robert A., Jr. Mckay, Christopher P. Clow, Gary D. Andersen, Dale T. Simmons, George M., Jr. Love, F. G. |
author_facet |
Wharton, Robert A., Jr. Mckay, Christopher P. Clow, Gary D. Andersen, Dale T. Simmons, George M., Jr. Love, F. G. |
author_sort |
Wharton, Robert A., Jr. |
title |
Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change |
title_short |
Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change |
title_full |
Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change |
title_fullStr |
Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change |
title_full_unstemmed |
Changes in ice cover thickness and lake level of Lake Hoare, Antarctica - Implications for local climatic change |
title_sort |
changes in ice cover thickness and lake level of lake hoare, antarctica - implications for local climatic change |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19920045847 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(162.850,162.850,-77.633,-77.633) |
geographic |
Hoare Lake Hoare Victoria Land |
geographic_facet |
Hoare Lake Hoare Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19920045847 Accession ID: 92A28471 |
op_rights |
Copyright |
_version_ |
1766273978591084544 |