NDLI: Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations

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Deutsche Hydrografische Zeitschrift : Volume 57, Issue 1, February 2007

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Spatial and temporal structure of the Denmark Strait Overflow revealed by acoustic observations

Content Provider	Springer Nature Link
Author	Macrander, Andreas Käse, Rolf H. Send, Uwe Valdimarsson, Héðinn Jónsson, Steingrímur
Copyright Year	2007
Abstract	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.
Starting Page	75
Ending Page	89
Page Count	15
File Format	PDF
ISSN	16167341
Journal	Deutsche Hydrografische Zeitschrift
Volume Number	57
Issue Number	2
e-ISSN	16167228
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-02-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Denmark Strait Overflow Acoustic observations ADCP PIES Geostrophy Structural Foundations, Hydraulic Engineering Fluids Meteorology/Climatology Geophysics/Geodesy Oceanography
Content Type	Text
Resource Type	Article
Subject	Oceanography

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