Benthic organic carbon flux and oxygen penetration depth in the Southern Ocean ...

• Main Authors: Sachs, Oliver, Sauter, Eberhard-Jürgen, Schlüter, Michael, Rutgers van der Loeff, Michiel M, Jerosch, Kerstin, Holby, Ola
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: Event label; Latitude of event; Longitude of event; DATE/TIME; DEPTH, sediment/rock; Depth, bathymetric; Gear; Sample method; Season; Oxygen penetration depth; Oxygen penetration depth, standard deviation; Total mass, flux per day; Factor; Carbon, organic, flux; Biological province; Reference of data; Uniform resource locator/link to reference; Area/locality; Comment; MultiCorer; Bottom lander; Box corer; Giant box corer; CTD/Rosette; Benthic Oxygen Lander System; Gravity corer Kiel type; Oxygen, microelectrode; Calculated; ECOFER; ANT-XXI/4; ANT-XXIV/2; ANT-V/4; ANT-VI/2; ANT-VI/3; ANT-VIII/3; ANT-VIII/6; ANT-X/5; ANT-X/6; ANT-XI/3; Le Suroît; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Arctic; Sea ice; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.663056; https://doi.pangaea.de/10.1594/PANGAEA.663056

For the investigation of organic carbon fluxes reaching the seafloor, oxygen microprofiles were measured at 145 sites in different sub-regions of the Southern Ocean. At eleven sites, an in situ oxygen microprofiler was deployed for the measurement of oxygen profiles and the calculation of organic carbon fluxes. At four sites, both in situ and ex situ data were determined for high latitudes. Based on this dataset as well as on previous published data, a relationship was established for the estimation of fluxes derived by ex situ measured O2 profiles. The fluxes of labile organic matter range from 0.5 to 37.1 mgC m**2/day. The high values determined by in situ measurements were observed in the Polar Front region (water depth of more than 4290 m) and are comparable to organic matter fluxes observed for high-productivity, upwelling areas like off West Africa. The oxygen penetration depth, which reflects the long-term organic matter flux to the sediment, was correlated with assemblages of key diatom species. In ... : see other version for graphs in high resolution. Data are related to the project DOMINO (Dynamics of benthic organic matter fluxes in polar deep-ocean environments), hdl:10013/epic.34113.d001 ...