Fiedler, Björn, Fietzek, Peer, Karstensen, Johannes , Vieira, N., Bittig, Henry C., Brandt, Peter and Körtzinger, Arne (2012) In Situ CO2 and O2 measurements on a profiling float at the Cape Verde Ocean Observatory | CVOO. [Poster] In: 5. SOPRAN Annual Meeting. , 20.-21.03.2012, Kiel, Germany .

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Abstract

During SOPRAN I & II, field work activities focused mainly on the Eastern Tropical North Atlantic (ETNA) near the Cape Verde Ocean Observatory (CVOO). Here we report about two major achievements during SOPRAN I & II:
(i) A typical ARGO float with a small-sized and novel submersible CO2 partial pressure (pCO2) sensor and an optode O2 sensor for high resolution measurements in the upper ocean was developed and field-deployed successfully. We report on the quality of the data as well as the distribution of the air-sea fluxes of the two gases.
(ii) Autonomous measurements have shown extremely low O2 concentrations below the mixed layer (< 1 µmol/kg) in certain mesoscale features drastically contrasting the otherwise reasonably well oxygenated open North Atlantic Ocean (> 40 µmol/kg). To our knowledge no such anoxic water parcels have ever been reported before for the open North Atlantic.

Document Type:	Conference or Workshop Item (Poster)
Keywords:	Physical Oceanography; Marine chemistry
Research affiliation:	OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Projects:	SOPRAN
Date Deposited:	12 Jul 2012 07:54
Last Modified:	12 Jul 2012 07:54
URI:	https://oceanrep.geomar.de/id/eprint/14787

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