Tracer Survey in the Cape Verde Region Traceraufnahme in der Kapverdenregion Cruise No. 10, Leg 1 October 31 – December 06, 2008 Ponta Delgada (Portugal) – Mindelo (Cape Verde Islands).

Visbeck, Martin , Baars, Oliver, Bancala, Severin, Banyte, Donata, Becker, Meike, Dengler, Marcus , Drees, Georg, Fehsenfeld, Sandra, Fischer, Tim , Karbe, Fritz Richard, Link, Rudolf, Manke, Anne, Rickels, Wilfried, Schlosser, Christian , Schneider, Anke, Schütt, Martina, Stange, Karen, Stramma, Lothar , Tanhua, Toste , Wilcken, Sara and Zocher, Johanna (2010) Tracer Survey in the Cape Verde Region Traceraufnahme in der Kapverdenregion Cruise No. 10, Leg 1 October 31 – December 06, 2008 Ponta Delgada (Portugal) – Mindelo (Cape Verde Islands). . Maria S. Merian-Berichte, 10-1 . Leitstelle Dt. Forschungsschiffe, Hamburg, Germany, 35 pp.

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Abstract

The research cruise MSM10/1 was extremely successful. All programs were able to collect high quality data and the anticipated goals of the expedition were fully met. We have been able to carry out the first comprehensive survey of a tracer release in the Guinea Upwelling region (GUTRE) roughly seven month after the tracer was released at 8°N 23°W in April 2008. We have estimated that a total of 40% of the tracer was found during this cruise. While the horizontal spreading and mixing was larger than anticipated, the vertical extent of the tracer found was small. The low vertical tracer spreading rate estimates are supported by the micro structure profile data. The extensive survey of the upper 1000m of the oxygen minimum zone (OMZ) allowed comparing our sections with several previous surveys. We found that the lowest oxygen values in the core of the OMZ have dropped at record low values below 40 μmol/kg. The preliminary findings from the trace metal work focused on Fe ligand measurements shows a slight higher excess ligand concentration in the surface (50m) for three stations. The two other stations show a slight decrease at this depth. A large number of biochemical samples were taken and were analyzed in Kiel for DNA and RNA diversity. The tracer release experiment provided an ideal environment for repeated biochemical sampling in the same water mass.

Document Type: Report (Cruise Report)
Keywords: Maria S. Merian Reise 10-1
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
OceanRep > SFB 754
Kiel University
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
Open Access Journal?: Yes
ISSN: 1868-8543
Related URLs:
Projects: CVOO, SFB754
Expeditions/Models/Experiments:
Date Deposited: 05 Apr 2013 11:02
Last Modified: 22 Jun 2017 11:39
URI: http://oceanrep.geomar.de/id/eprint/20895

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