Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it
The Riiser-Larsen ice shelf is the fourth largest ice shelf on Earth. The detailed depth and shape of the seabed beneath the ice shelf is entirely unknown. Since bed topography beneath ice shelves generally poses the controlling factor of heat exchange between the open ocean and water cavities, this...
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ftawi:oai:epic.awi.de:58232 2024-05-19T07:39:31+00:00 Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it Eisermann, Hannes Hattermann, Tore Matsuoka, Kenichi Franke, Steven Steinhage, Daniel Helm, Veit Ruppel, Antonia Läufer, Andreas Leinen, Stefan Johann, Felix Eagles, Graeme 2023-09-11 application/pdf https://epic.awi.de/id/eprint/58232/ https://epic.awi.de/id/eprint/58232/1/2023_09_Eisermann_INSTANT.pdf https://hdl.handle.net/10013/epic.160dcbc7-95a4-4aae-850a-58b4bb4350dd unknown https://epic.awi.de/id/eprint/58232/1/2023_09_Eisermann_INSTANT.pdf Eisermann, H. orcid:0000-0002-5604-6484 , Hattermann, T. , Matsuoka, K. , Franke, S. orcid:0000-0001-8462-4379 , Steinhage, D. , Helm, V. , Ruppel, A. , Läufer, A. , Leinen, S. , Johann, F. and Eagles, G. (2023) Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it hdl:10013/epic.160dcbc7-95a4-4aae-850a-58b4bb4350dd EPIC3 Conference NonPeerReviewed 2023 ftawi 2024-04-30T23:35:56Z The Riiser-Larsen ice shelf is the fourth largest ice shelf on Earth. The detailed depth and shape of the seabed beneath the ice shelf is entirely unknown. Since bed topography beneath ice shelves generally poses the controlling factor of heat exchange between the open ocean and water cavities, this unknown factor inhibits proper assessment of ice-ocean interactions. In coastal Dronning Maud Land, the intrusion of Warm Deep Water – a warm intermediate water mass transported by the Weddell Gyre – into the ice shelf cavities is strongly dependent on seabed depth. We are addressing this shortcoming by generating a bathymetric model beneath the ice shelf based on the inversion of gravity data and complementary data sets of magnetic and ice penetrating radar data, all acquired during the joint AWI-BGR airborne campaign ‘RIISERBATHY’ in 2022/23. The resulting model will have a resolution of 5 to 10 km and is complemented offshore by shipborne hydroacoustic data. We present the first versions of the model here. Modelled depths can be compared to thermocline depths of available in-situ oceanographic data close to and at the calving fronts. In doing so, we will identify key regions of possible entry for Warm Deep Water into the cavity beneath the ice shelf. Conference Object Dronning Maud Land Ice Shelf Ice Shelves Larsen Ice Shelf Riiser Larsen Ice Shelf Riiser-Larsen Ice Shelf Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The Riiser-Larsen ice shelf is the fourth largest ice shelf on Earth. The detailed depth and shape of the seabed beneath the ice shelf is entirely unknown. Since bed topography beneath ice shelves generally poses the controlling factor of heat exchange between the open ocean and water cavities, this unknown factor inhibits proper assessment of ice-ocean interactions. In coastal Dronning Maud Land, the intrusion of Warm Deep Water – a warm intermediate water mass transported by the Weddell Gyre – into the ice shelf cavities is strongly dependent on seabed depth. We are addressing this shortcoming by generating a bathymetric model beneath the ice shelf based on the inversion of gravity data and complementary data sets of magnetic and ice penetrating radar data, all acquired during the joint AWI-BGR airborne campaign ‘RIISERBATHY’ in 2022/23. The resulting model will have a resolution of 5 to 10 km and is complemented offshore by shipborne hydroacoustic data. We present the first versions of the model here. Modelled depths can be compared to thermocline depths of available in-situ oceanographic data close to and at the calving fronts. In doing so, we will identify key regions of possible entry for Warm Deep Water into the cavity beneath the ice shelf. |
format |
Conference Object |
author |
Eisermann, Hannes Hattermann, Tore Matsuoka, Kenichi Franke, Steven Steinhage, Daniel Helm, Veit Ruppel, Antonia Läufer, Andreas Leinen, Stefan Johann, Felix Eagles, Graeme |
spellingShingle |
Eisermann, Hannes Hattermann, Tore Matsuoka, Kenichi Franke, Steven Steinhage, Daniel Helm, Veit Ruppel, Antonia Läufer, Andreas Leinen, Stefan Johann, Felix Eagles, Graeme Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it |
author_facet |
Eisermann, Hannes Hattermann, Tore Matsuoka, Kenichi Franke, Steven Steinhage, Daniel Helm, Veit Ruppel, Antonia Läufer, Andreas Leinen, Stefan Johann, Felix Eagles, Graeme |
author_sort |
Eisermann, Hannes |
title |
Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it |
title_short |
Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it |
title_full |
Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it |
title_fullStr |
Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it |
title_full_unstemmed |
Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it |
title_sort |
ice-ocean interactions at riiser-larsen ice shelf assessed by unveiling of seabed beneath it |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58232/ https://epic.awi.de/id/eprint/58232/1/2023_09_Eisermann_INSTANT.pdf https://hdl.handle.net/10013/epic.160dcbc7-95a4-4aae-850a-58b4bb4350dd |
genre |
Dronning Maud Land Ice Shelf Ice Shelves Larsen Ice Shelf Riiser Larsen Ice Shelf Riiser-Larsen Ice Shelf |
genre_facet |
Dronning Maud Land Ice Shelf Ice Shelves Larsen Ice Shelf Riiser Larsen Ice Shelf Riiser-Larsen Ice Shelf |
op_source |
EPIC3 |
op_relation |
https://epic.awi.de/id/eprint/58232/1/2023_09_Eisermann_INSTANT.pdf Eisermann, H. orcid:0000-0002-5604-6484 , Hattermann, T. , Matsuoka, K. , Franke, S. orcid:0000-0001-8462-4379 , Steinhage, D. , Helm, V. , Ruppel, A. , Läufer, A. , Leinen, S. , Johann, F. and Eagles, G. (2023) Ice-ocean interactions at Riiser-Larsen Ice Shelf assessed by unveiling of seabed beneath it hdl:10013/epic.160dcbc7-95a4-4aae-850a-58b4bb4350dd |
_version_ |
1799479102615322624 |