Gerke, Lennart (2017) Transient Tracers and Eddies along GO-SHIP section A10.5. (Bachelor thesis), Christian-Albrechts-Universität zu Kiel, Kiel, Germany, 51 pp.

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Abstract

This thesis analyzes different ocean parameters that were obtained during a cruise from Cape Town in South Africa to Montevideo in Uruguay in January 2017. A particular emphasis is put on the distribution of the transient tracers CFC-12 and SF6 that can provide information about the movement and circulation of water masses. Moreover, tracer concentrations as well as salinity, temperature and other parameters in different depth along the cruise were used to predict eddies and the influence of these eddies on the parameter distributions and the ocean circulation was examined. The results show a characteristic upwelling of the different parameters at specific longitudes indicative of two to three eddies along the cruise. The eddies are particularly evident in the ADCP (Acoustic Doppler Currents Profiler) data which also show that one of the eddies is turning clockwise and another one counterclockwise. Detailed analysis of the distribution of the transient tracers and the other parameters also reveals the existence of Antarctic Intermediate Water (AAIW) at a depth from 500 to 1800 m, Antarctic Bottom Water (AABW) close to the bottom and North Atlantic Deep Water (NADW).

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