Particle fluxes and composition at two mooring sites in the Polar Front Region ...

• Main Authors: Fischer, Gerhard, Gersonde, Rainer, Wefer, Gerold
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2002
• Subjects: Trap; Mooring long time; Mooring; ANT-XII/2; ANT-V/4; ANT-XII/4; Polarstern; Center for Marine Environmental Sciences MARUM; Southern Ocean; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.760873; https://doi.pangaea.de/10.1594/PANGAEA.760873

Particle fluxes and composition were examined over 5 years at two mooring sites in the Polar Front Region (site PF: 50°09.S, 5°50.E) and in the marginal winter sea-ice zone (site BO: 54°30.S, 3°20.W) in the eastern Atlantic Sector of the Southern Ocean. Seasonality, interannual variability and the magnitude of total mass fluxes were higher at site BO compared to PF. Five-year averages and standard deviations (1Sigma) of total mass fluxes were 19.6±18.5 and 24.8±29.9 g m**-2 at PF and BO, respectively. Peak fluxes at site BO occurred in January 1995, but the highest peak was measured in February 1991 (almost 1300 mg m**-2 d**-1) followed by post-bloom sedimentation in March through May. This would imply a time shift of several months between the onset of sea-ice retreat in October and major sedimentation events recorded in January/February with the upper BO traps. At site PF, highest fluxes of about 500 mg m**-2 d**-1 were found between December and March. Blooms at site BO, influenced by sea ice as indicated ... : Supplement to: Fischer, Gerhard; Gersonde, Rainer; Wefer, Gerold (2002): Organic carbon, biogenic silica and diatom fluxes in the marginal winter sea ice zone and in the Polar Front Region: interannual variation and changes in composition. Deep Sea Research Part II: Topical Studies in Oceanography, 49(9-10), 1721-1745 ...