On the determination of vertical velocities in the tropical Atlantic Ocean.

Wittstock, R.-R. and Siedler, Gerold (1980) On the determination of vertical velocities in the tropical Atlantic Ocean. Open Access Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 21 . pp. 49-56.

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Abstract

Vertical velocity spectra can be determined by three different indirect methods: Following isopycnal surface displacements, following isothermal surface displacements, or calculating water particle displacements from temperature time series at fixed pressure levels, with the mean vertical temperature gradient used for the conversion factor. This third method is the easiest to perform. Data from GATE 1974, obtained by CTD profiling onboard R. V. "Meteor" and by temperature measurements on moorings, are used to check whether the three methods are equivalent. lt is shown that autospectra do not differ significantly within the 95 % confidence intervals, and either method can be applied. This does not infer an equivalence with respect to the actual data points since individual events were found in the low-passed time series with deviations occurring between displacement curves obtained by the different methods. These events were apparently due to the advection of another water mass.

Document Type: Article
Keywords: physical oceanography; Atlantic Ocean; R.V. METEOR (1964); M34
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
OceanRep > Institute for Marine Science Kiel
Refereed: Yes
Open Access Journal?: No
Publisher: Bornträger
Projects: GATE
Expeditions/Models/Experiments:
Date Deposited: 11 Sep 2012 09:26
Last Modified: 24 Jun 2022 07:48
URI: https://oceanrep.geomar.de/id/eprint/15205

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