Surface sediments from the high-latitude southern and northern Atlantic Ocean have been investigated with respect to the benthic cycle of particulate organic carbon (POC) and biogenic silica (BSi). Special emphasis has been given to the magnitude of benthic fluxes, their spatial distribution, their relation to particle-trap studies, and their ability to trace ice-related features.In both polar regions enhanced fluxes of POC to the seafloor were observed for polynyas, reflecting the enhanced primary production of recurrent ice-free surface-water formation in these regions. Very similar fluxes were observed for organic carbon in the Weddell Sea and the northern North Atlantic. Within the northern North Atlantic regional differences in POC fluxes were investigated using an empirically derived relationship between benthic POC flux, primary production, and water depth. The calculated spatial budget suggests that 2% of the primary production is exported below 1000 m water depth and that 1.2% reaches the seafloor. These values are quite similar to temperate regions within the world oceans.
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- Fluxes of Organic Carbon and Biogenic Silica Reaching the Seafloor: A Comparison of High Northern and Southern Latitudes of the Atlantic Ocean
Eberhard J. Sauter
- Springer Berlin Heidelberg
Systemische Notwendigkeit zur Weiterentwicklung von Hybridnetzen