Sediment Arctic Ocean

A survey of available Th data for the ocean basins demonstrated that the highest concentrations are found nearer to the coasts, and it was concluded that while eolian inputs likely dominated the budget in the open ocean and could account for increases near the coast, fluvial inputs may be more important in coastal regions. This implies that some a mechanism causes recycling of Th that has been removed to estuarine sediments (Huh et al. 1989). A study of an ice-covered region of the western Arctic Ocean found that significant amounts of °Th and Th were advected into the basin (Edmonds et al. 1998). Therefore, it appears that while long-lived Th isotopes are rapidly removed into estuarine sediments, transport into the ocean basins may continue. 

PFCs have been detected in environmental and biological samples being widespread around the world including water, soils and sediments, human samples, and even in remote areas such as the Arctic (atmosphere [34], Arctic Ocean [35], biological samples [36, 37] and few reviews have been published [38, 39]) or Antarctic (biological samples as penguins or seals [40, 41]). 

The continental shelves cover most of the seafloor in the Arctic Ocean, making this the shallowest ocean. Thus, most of the sediments are neritic. Because of light limitation, primary production is inhibited, so river runoff and ice rafting supply most of the particles to this ocean. As a result, lithogenous and glacial marine sediments are most common. 

Schubert, C. J., and Calvert, S. E. (2001). Nitrogen and carbon isotopic composition of marine and terrestrial organic matter in Arctic Ocean sediments Implications for nutrient utilization and organic matter composition. Deep-Sea Res. 148, 789-810. 

Schubert C. J. and Stein R. (1996) Deposition of organic carbon in Arctic Ocean sediments terrigenous supply vs. marine productivity. Org. Geochem. 24(4), 421 -436. 

Gobeil C., MacDonald R. W., and Smith J. N. (1999) Mercury profiles in sediments of the Arctic Ocean basins. Environ. Sci. Technol. 33, 4194-4198. 

Kroncke, L, Vanreusel, A., ViNCX, M., WOLLENBURG, J., MACKENSEN, A., LlEBEZEIT, G. Behrends, B. 2000. Different benthic size-compartments and their relationship to sediment chemistry in the deep Eurasian Arctic Ocean. Marine Ecology Progress Series, 199, 31-41. 

In certain regions, the transport and the distribution carried out by sea ice are important processes. This is especially true for the Arctic Ocean where specific processes in the shallow coastal areas of the Eurasian shelf induce the ice, in the course of its formation, to incorporate sediment material from the ocean floor and the water column. The Transpolar Drift distributes the sediment material across the Arctic Ocean all the way to the North Atlantic. Glacio-marine sedimentation covers one-fifth of present day s ocean floor (Lisitzin 1996). 

Bergmann U., 1996. Interpretation of digital Parasound echosounder records of the eastern Arctic Ocean on the basis of sediment physical properties. Rep. on Polar Research, Alfred-Wegener Institute for Polar and Marine Research, Bremerhaven 183 164 pp... 

Lin ZL, Hu DX, Chu ZX (2008) Observation of cnrrents in the southern Yellow Sea in the summers of 2001 and 2003. J Ocean Univ Chin 7(1) 17-26 Ln B, Chen RH, Wang ZP, Zhu C, Vetter W (2005) The distribution pattern of persistent organic pollutants and their molecule stratigraphic records in the sediments from the Arctic Ocean. Acta Oceanol Sin 27(4) 167-173 (in Chinese with English abstract)... 

Air and water transport of technical chlordane has resulted in the detection of chlordane and its metabolites in nonbiological samples worldwide. Chlordane enters the atmosphere mainly through aerial applications of dust and spray formulations, soil erosion by wind, and volatilization from soil and water. In aquatic systems, chlordane enters by way of surface runoff and rainfall chlordane is rapidly adsorbed onto bottom sediments, where it persists. Atmospheric transport of chlordanes is considered the major route of global dissemination. Levels of chlordane compounds in the marine atmosphere of the southern hemisphere are nearly the same as those of DDT and its metabolites this strongly suggests that chlordane compounds are globally distributed and dispersed. The yearly input of m-chlordane to the Arctic Ocean from atmospheric sources is... 

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