Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast
Melting is a fundamental process in glacier mass balance as well as in other glacial processes such as ice movement, ice avalanches and snow metamorphism. At Terra Nova Bay, Antarctica, the annual mean temperature is <0°C but melting is not negligible. Our data show that melting is present up to...
Main Authors: | , |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | http://hdl.handle.net/2318/1624 |
id |
ftunivtorino:oai:iris.unito.it:2318/1624 |
---|---|
record_format |
openpolar |
spelling |
ftunivtorino:oai:iris.unito.it:2318/1624 2023-08-20T04:01:53+02:00 Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast MOTTA, LUIGI MOTTA, Michele MOTTA L MOTTA M 2004 http://hdl.handle.net/2318/1624 eng eng volume:39 (1) firstpage:483 lastpage:489 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/2318/1624 info:eu-repo/semantics/closedAccess Snow Melting Radiation Snow metamorphism Antarctica Indicatori climatici Nivologia info:eu-repo/semantics/article 2004 ftunivtorino 2023-08-01T22:22:39Z Melting is a fundamental process in glacier mass balance as well as in other glacial processes such as ice movement, ice avalanches and snow metamorphism. At Terra Nova Bay, Antarctica, the annual mean temperature is <0°C but melting is not negligible. Our data show that melting is present up to 1300 m a.s.l. The distribution and relative importance of melting change with elevation and exposure. At low elevation and with a southerly exposure, melting is one of the major summer ablation process, synergetic with dry calving and katabatic wind. Meltwater seepage reaches the glacier substrate. Discharge appears to be linked to irradiation, offset by a few hours relative to it. The frontal area of the glaciers therefore behaves like an aquifer, and its characteristics depend on the morphology of the front. As elevation increases, melting at first becomes limited to the snowpack, then to low-albedo cases, for example when dust is brought in from the areas surrounding the glacier. In this case, melting limits ablation, providing the snow with increased resistance to wind erosion. Article in Journal/Newspaper Antarc* Antarctica Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) Terra Nova Bay |
institution |
Open Polar |
collection |
Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) |
op_collection_id |
ftunivtorino |
language |
English |
topic |
Snow Melting Radiation Snow metamorphism Antarctica Indicatori climatici Nivologia |
spellingShingle |
Snow Melting Radiation Snow metamorphism Antarctica Indicatori climatici Nivologia MOTTA, LUIGI MOTTA, Michele Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast |
topic_facet |
Snow Melting Radiation Snow metamorphism Antarctica Indicatori climatici Nivologia |
description |
Melting is a fundamental process in glacier mass balance as well as in other glacial processes such as ice movement, ice avalanches and snow metamorphism. At Terra Nova Bay, Antarctica, the annual mean temperature is <0°C but melting is not negligible. Our data show that melting is present up to 1300 m a.s.l. The distribution and relative importance of melting change with elevation and exposure. At low elevation and with a southerly exposure, melting is one of the major summer ablation process, synergetic with dry calving and katabatic wind. Meltwater seepage reaches the glacier substrate. Discharge appears to be linked to irradiation, offset by a few hours relative to it. The frontal area of the glaciers therefore behaves like an aquifer, and its characteristics depend on the morphology of the front. As elevation increases, melting at first becomes limited to the snowpack, then to low-albedo cases, for example when dust is brought in from the areas surrounding the glacier. In this case, melting limits ablation, providing the snow with increased resistance to wind erosion. |
author2 |
MOTTA L MOTTA M |
format |
Article in Journal/Newspaper |
author |
MOTTA, LUIGI MOTTA, Michele |
author_facet |
MOTTA, LUIGI MOTTA, Michele |
author_sort |
MOTTA, LUIGI |
title |
Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast |
title_short |
Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast |
title_full |
Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast |
title_fullStr |
Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast |
title_full_unstemmed |
Distribution and pattern of shallow melting at the local glaciers of Terra Nova Bay (Antarctica) coast |
title_sort |
distribution and pattern of shallow melting at the local glaciers of terra nova bay (antarctica) coast |
publishDate |
2004 |
url |
http://hdl.handle.net/2318/1624 |
geographic |
Terra Nova Bay |
geographic_facet |
Terra Nova Bay |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
volume:39 (1) firstpage:483 lastpage:489 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/2318/1624 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1774712271492087808 |