Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations
In spite of the fundamental role the Atlantic Meridional Overturning Circulation (AMOC) plays for global climate stability, no direct current measurement of the Denmark Strait Overflow, which is the densest part of the AMOC, has been available until recently that resolve the cross-stream structure a...
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Online Access: | https://oceanrep.geomar.de/id/eprint/29765/ https://oceanrep.geomar.de/id/eprint/29765/1/Macrander07.pdf https://doi.org/10.1007/s10236-007-0101-x |
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ftoceanrep:oai:oceanrep.geomar.de:29765 2023-05-15T16:00:36+02:00 Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations Macrander, Andreas Käse, Rolf H. Send, Uwe Valdimarsson, Héðinn Jónsson, Steingrímur 2007 text https://oceanrep.geomar.de/id/eprint/29765/ https://oceanrep.geomar.de/id/eprint/29765/1/Macrander07.pdf https://doi.org/10.1007/s10236-007-0101-x en eng Springer https://oceanrep.geomar.de/id/eprint/29765/1/Macrander07.pdf Macrander, A., Käse, R. H., Send, U., Valdimarsson, H. and Jónsson, S. (2007) Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations. Ocean Dynamics, 57 (2). pp. 75-89. DOI 10.1007/s10236-007-0101-x <https://doi.org/10.1007/s10236-007-0101-x>. doi:10.1007/s10236-007-0101-x info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2007 ftoceanrep https://doi.org/10.1007/s10236-007-0101-x 2023-04-07T15:20:54Z In spite of the fundamental role the Atlantic Meridional Overturning Circulation (AMOC) plays for global climate stability, no direct current measurement of the Denmark Strait Overflow, which is the densest part of the AMOC, has been available until recently that resolve the cross-stream structure at the sill for long periods. Since 1999, an array of bottom-mounted acoustic instruments measuring current velocity and bottom-to-surface acoustic travel times was deployed at the sill. Here, the optimization of the array configuration based on a numerical overflow model is discussed. The simulation proves that more than 80% of the dense water transport variability is captured by two to three acoustic current profilers (ADCPs). The results are compared with time series from ADCPs and Inverted Echo Sounders deployed from 1999 to 2003, confirming that the dense overflow plume can be reliably measured by bottom-mounted instruments and that the overflow is largely geostrophically balanced at the sill. Article in Journal/Newspaper Denmark Strait OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Ocean Dynamics 57 2 75 89 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
In spite of the fundamental role the Atlantic Meridional Overturning Circulation (AMOC) plays for global climate stability, no direct current measurement of the Denmark Strait Overflow, which is the densest part of the AMOC, has been available until recently that resolve the cross-stream structure at the sill for long periods. Since 1999, an array of bottom-mounted acoustic instruments measuring current velocity and bottom-to-surface acoustic travel times was deployed at the sill. Here, the optimization of the array configuration based on a numerical overflow model is discussed. The simulation proves that more than 80% of the dense water transport variability is captured by two to three acoustic current profilers (ADCPs). The results are compared with time series from ADCPs and Inverted Echo Sounders deployed from 1999 to 2003, confirming that the dense overflow plume can be reliably measured by bottom-mounted instruments and that the overflow is largely geostrophically balanced at the sill. |
format |
Article in Journal/Newspaper |
author |
Macrander, Andreas Käse, Rolf H. Send, Uwe Valdimarsson, Héðinn Jónsson, Steingrímur |
spellingShingle |
Macrander, Andreas Käse, Rolf H. Send, Uwe Valdimarsson, Héðinn Jónsson, Steingrímur Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations |
author_facet |
Macrander, Andreas Käse, Rolf H. Send, Uwe Valdimarsson, Héðinn Jónsson, Steingrímur |
author_sort |
Macrander, Andreas |
title |
Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations |
title_short |
Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations |
title_full |
Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations |
title_fullStr |
Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations |
title_full_unstemmed |
Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations |
title_sort |
spatial and temporal structure of the denmark strait overflow revealed by acoustic observations |
publisher |
Springer |
publishDate |
2007 |
url |
https://oceanrep.geomar.de/id/eprint/29765/ https://oceanrep.geomar.de/id/eprint/29765/1/Macrander07.pdf https://doi.org/10.1007/s10236-007-0101-x |
genre |
Denmark Strait |
genre_facet |
Denmark Strait |
op_relation |
https://oceanrep.geomar.de/id/eprint/29765/1/Macrander07.pdf Macrander, A., Käse, R. H., Send, U., Valdimarsson, H. and Jónsson, S. (2007) Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations. Ocean Dynamics, 57 (2). pp. 75-89. DOI 10.1007/s10236-007-0101-x <https://doi.org/10.1007/s10236-007-0101-x>. doi:10.1007/s10236-007-0101-x |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s10236-007-0101-x |
container_title |
Ocean Dynamics |
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57 |
container_issue |
2 |
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75 |
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89 |
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1766396608330596352 |