The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland
Seismic depth soundings on Nioghalvfjerdsfjorden Glacier (NFG), NE Greenland, reveal an overdeepened trough under the floating glacier. The maximum depth of the trough reaches more than 900 m below sea level. Mass balance calculations indicate considerable ice loss due to strong subglacial melting w...
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ftawi:oai:epic.awi.de:3636 2024-09-15T18:07:40+00:00 The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland Mayer, Christoph Reeh, N. Jung-Rothenhäusler, F. Huybrechts, Philippe Oerter, Hans 2000 application/pdf https://epic.awi.de/id/eprint/3636/ https://epic.awi.de/id/eprint/3636/1/May2000a.pdf http://dx.doi.org/2000GL011514 https://hdl.handle.net/10013/epic.14217 https://hdl.handle.net/10013/epic.14217.d001 unknown https://epic.awi.de/id/eprint/3636/1/May2000a.pdf https://hdl.handle.net/10013/epic.14217.d001 Mayer, C. , Reeh, N. , Jung-Rothenhäusler, F. , Huybrechts, P. and Oerter, H. (2000) The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland , Geophysical Research Letters, 27 (15), pp. 2289-2292 . doi:2000GL011514 , hdl:10013/epic.14217 EPIC3Geophysical Research Letters, 27(15), pp. 2289-2292, ISSN: 0094-8276 Article isiRev 2000 ftawi 2024-06-24T03:54:11Z Seismic depth soundings on Nioghalvfjerdsfjorden Glacier (NFG), NE Greenland, reveal an overdeepened trough under the floating glacier. The maximum depth of the trough reaches more than 900 m below sea level. Mass balance calculations indicate considerable ice loss due to strong subglacial melting with a mean melt rate of 8 m/a. The geometry of the cavity and water mass characteristics from CTD measurements suggest the existence of a well defined regional circulation system. Warm, saline and rather dense water follows the inward inclining basal slope through the deep valley of Dijmphna Sund towards the grounding line. Shallow ridges at the eastern glacier front prevent this water mass entering from that direction. The comparatively cold, fresh and less dense melt water follows the subglacial ice topography leaving the cavity through the gaps towards the east. The abundance of subglacial melt water east of NFG is most probably one of the main reasons for the semi permanent sea ice cover in this region. Cold water masses upwelling in the Northeast Water Polynia and detected by satellite remote sensing are very likely influenced and modified by the subglacial melt water production. Article in Journal/Newspaper glacier Greenland Nioghalvfjerdsfjorden Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Seismic depth soundings on Nioghalvfjerdsfjorden Glacier (NFG), NE Greenland, reveal an overdeepened trough under the floating glacier. The maximum depth of the trough reaches more than 900 m below sea level. Mass balance calculations indicate considerable ice loss due to strong subglacial melting with a mean melt rate of 8 m/a. The geometry of the cavity and water mass characteristics from CTD measurements suggest the existence of a well defined regional circulation system. Warm, saline and rather dense water follows the inward inclining basal slope through the deep valley of Dijmphna Sund towards the grounding line. Shallow ridges at the eastern glacier front prevent this water mass entering from that direction. The comparatively cold, fresh and less dense melt water follows the subglacial ice topography leaving the cavity through the gaps towards the east. The abundance of subglacial melt water east of NFG is most probably one of the main reasons for the semi permanent sea ice cover in this region. Cold water masses upwelling in the Northeast Water Polynia and detected by satellite remote sensing are very likely influenced and modified by the subglacial melt water production. |
format |
Article in Journal/Newspaper |
author |
Mayer, Christoph Reeh, N. Jung-Rothenhäusler, F. Huybrechts, Philippe Oerter, Hans |
spellingShingle |
Mayer, Christoph Reeh, N. Jung-Rothenhäusler, F. Huybrechts, Philippe Oerter, Hans The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland |
author_facet |
Mayer, Christoph Reeh, N. Jung-Rothenhäusler, F. Huybrechts, Philippe Oerter, Hans |
author_sort |
Mayer, Christoph |
title |
The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland |
title_short |
The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland |
title_full |
The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland |
title_fullStr |
The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland |
title_full_unstemmed |
The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland |
title_sort |
subglacial cavity and implied dynamics under nioghalvfjerdsfjorden glacier, ne-greenland |
publishDate |
2000 |
url |
https://epic.awi.de/id/eprint/3636/ https://epic.awi.de/id/eprint/3636/1/May2000a.pdf http://dx.doi.org/2000GL011514 https://hdl.handle.net/10013/epic.14217 https://hdl.handle.net/10013/epic.14217.d001 |
genre |
glacier Greenland Nioghalvfjerdsfjorden Sea ice |
genre_facet |
glacier Greenland Nioghalvfjerdsfjorden Sea ice |
op_source |
EPIC3Geophysical Research Letters, 27(15), pp. 2289-2292, ISSN: 0094-8276 |
op_relation |
https://epic.awi.de/id/eprint/3636/1/May2000a.pdf https://hdl.handle.net/10013/epic.14217.d001 Mayer, C. , Reeh, N. , Jung-Rothenhäusler, F. , Huybrechts, P. and Oerter, H. (2000) The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland , Geophysical Research Letters, 27 (15), pp. 2289-2292 . doi:2000GL011514 , hdl:10013/epic.14217 |
_version_ |
1810445039996764160 |