We would like to thank the chief scientists on board R/V Knorr (R. Pickart) and C.S.S. Hudson (J. Lazier) for deploying our floats during their cruises. Christian Mertens helped in many respects, which is greatly appreciated. This work was funded by the “Deutsche Forschungsgemeinschaft” through the “Sonderforschungsbereich” SFB-460.
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