Monitoring the integrated deep meridional flow in the tropical North Atlantic: long-term performance of a geostrophic array
Kanzow, T., Send, U., Zenk, W., Chave, A.D. and Rhein, M. (2006) Monitoring the integrated deep meridional flow in the tropical North Atlantic: long-term performance of a geostrophic array. Deep-Sea Research I, 53, (3), 528-546. (doi:10.1016/j.dsr.2005.12.007).
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As a component of the meridional overturning variability experiment in the tropical North Atlantic, a four-year-long time series of meridional transport of North Atlantic deep water has been obtained from moored end point measurements of density and bottom pressure. This study presents a quality assessment of the measurement elements. Rigorous pre- and post- deployment in situ calibration of the density sensors and subsequent data processing establish an accuracy of O(1.5 Sv) in internal transport in the 1200–5000 dbar range at subinertial time scales. A similar accuracy is reached in the bottom pressure-derived external transport fluctuations. However, for pressure, variability with periods longer than a deployment's duration (presently about one year) is not measurable. This effect is demonstrated using numerical simulations and a possible solution for detecting long-term external transport changes is presented.
|Keywords:||geostrophic transport; time series; bottom pressure; density; Meridional Overturning Circulation|
|Subjects:||G Geography. Anthropology. Recreation > GC Oceanography|
|Divisions:||University Structure - Pre August 2011 > National Oceanography Centre (NERC)
|Date Deposited:||19 Feb 2007|
|Last Modified:||12 Jul 2012 12:31|
|Contributors:||Kanzow, T. (Author)
Send, U. (Author)
Zenk, W. (Author)
Chave, A.D. (Author)
Rhein, M. (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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