New direct Overflow Observations at the Denmark Strait Sill
As a key region of the global thermohaline circulation, the Denmark Strait between Iceland and Greenland is the pathway for the densest component of the North Atlantic Deep Water, the Denmark Strait Overflow Water (DSOW).Since 1999, it has been probed with acoustic instruments in the SFB 460 program...
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ftawi:oai:epic.awi.de:19869 2024-09-15T18:03:35+00:00 New direct Overflow Observations at the Denmark Strait Sill Macrander, Annecke Send, U. Käse, R. H. 2003 https://epic.awi.de/id/eprint/19869/ https://hdl.handle.net/10013/epic.31764 unknown Macrander, A. , Send, U. and Käse, R. H. (2003) New direct Overflow Observations at the Denmark Strait Sill , Contribution EAE03-A-12596 to EGS-AGU-EUG Joint Assembly, Nice, France.-11.04.2003. . hdl:10013/epic.31764 EPIC3Contribution EAE03-A-12596 to EGS-AGU-EUG Joint Assembly, Nice, France.-11.04.2003., 07 Conference notRev 2003 ftawi 2024-06-24T04:01:09Z As a key region of the global thermohaline circulation, the Denmark Strait between Iceland and Greenland is the pathway for the densest component of the North Atlantic Deep Water, the Denmark Strait Overflow Water (DSOW).Since 1999, it has been probed with acoustic instruments in the SFB 460 program lead by the Institut für Meereskunde Kiel. The data from bottom Pressure/ Inverted Echo Sounders (PIES) and ADCP current profilers, deployed in a model-optimized mooring array at the Denmark Strait sill, resolve both spatial and temporal variability of the overflow.After recovery of moorings in August 2002, the time series available have a total length of 27 months. The data allow for transport estimates based on direct ADCP measurements and integrating geostrophic PIES observations. Including model comparisons, a mean DSOW transport of 3.0 Sv is calculated with an accuracy of ±0.1 Sv. A statistical analysis with autoregressive moving average models has improved the information about integral time scales and dominant frequencies of the overflow variability.Until now, estimates of the mean DSOW throughflow have been remarkably stable. The PIES observations show a close correlation between sea surface height anomalies and the DSOW plume thickness. This opens a perspective for long term monitoring by remote sensing with relevance for climate change. First comparisons of in-situ measurements and satellite altimetry are presented. Conference Object Denmark Strait Greenland Iceland North Atlantic Deep Water North Atlantic 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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As a key region of the global thermohaline circulation, the Denmark Strait between Iceland and Greenland is the pathway for the densest component of the North Atlantic Deep Water, the Denmark Strait Overflow Water (DSOW).Since 1999, it has been probed with acoustic instruments in the SFB 460 program lead by the Institut für Meereskunde Kiel. The data from bottom Pressure/ Inverted Echo Sounders (PIES) and ADCP current profilers, deployed in a model-optimized mooring array at the Denmark Strait sill, resolve both spatial and temporal variability of the overflow.After recovery of moorings in August 2002, the time series available have a total length of 27 months. The data allow for transport estimates based on direct ADCP measurements and integrating geostrophic PIES observations. Including model comparisons, a mean DSOW transport of 3.0 Sv is calculated with an accuracy of ±0.1 Sv. A statistical analysis with autoregressive moving average models has improved the information about integral time scales and dominant frequencies of the overflow variability.Until now, estimates of the mean DSOW throughflow have been remarkably stable. The PIES observations show a close correlation between sea surface height anomalies and the DSOW plume thickness. This opens a perspective for long term monitoring by remote sensing with relevance for climate change. First comparisons of in-situ measurements and satellite altimetry are presented. |
format |
Conference Object |
author |
Macrander, Annecke Send, U. Käse, R. H. |
spellingShingle |
Macrander, Annecke Send, U. Käse, R. H. New direct Overflow Observations at the Denmark Strait Sill |
author_facet |
Macrander, Annecke Send, U. Käse, R. H. |
author_sort |
Macrander, Annecke |
title |
New direct Overflow Observations at the Denmark Strait Sill |
title_short |
New direct Overflow Observations at the Denmark Strait Sill |
title_full |
New direct Overflow Observations at the Denmark Strait Sill |
title_fullStr |
New direct Overflow Observations at the Denmark Strait Sill |
title_full_unstemmed |
New direct Overflow Observations at the Denmark Strait Sill |
title_sort |
new direct overflow observations at the denmark strait sill |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/19869/ https://hdl.handle.net/10013/epic.31764 |
genre |
Denmark Strait Greenland Iceland North Atlantic Deep Water North Atlantic |
genre_facet |
Denmark Strait Greenland Iceland North Atlantic Deep Water North Atlantic |
op_source |
EPIC3Contribution EAE03-A-12596 to EGS-AGU-EUG Joint Assembly, Nice, France.-11.04.2003., 07 |
op_relation |
Macrander, A. , Send, U. and Käse, R. H. (2003) New direct Overflow Observations at the Denmark Strait Sill , Contribution EAE03-A-12596 to EGS-AGU-EUG Joint Assembly, Nice, France.-11.04.2003. . hdl:10013/epic.31764 |
_version_ |
1810441073120509952 |