Topic
Water column
About: Water column is a research topic. Over the lifetime, 13706 publications have been published within this topic receiving 496626 citations.
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01 Jun 2004
TL;DR: A synthesis of 9 years of hydrographic measurements, acquired during approximately 25 cruises (1992-2000) on the French continental shelf of the Bay of Biscay, is presented in this article.
Abstract: A synthesis of 9 years of hydrographic measurements, acquired during approximately 25 cruises (1992–2000) on the French continental shelf of the Bay of Biscay, is presented. The main focus is upon salinity distribution, as it is little known in this area. The whole of the data set covers 11 months of the year, with some sampling fields repeated several times a year, for multiple years. This timeseries allows temperature and salinity distributions to be studied together with their seasonal, interannual and mesoscale variability. The seasonal trend in temperature can be described in three stages, which are in agreement with past studies. Thermal stratification occurs between May and mid-September in a layer not, vert, similar50 m in thickness, whereas the water column remains homogenous from January to the beginning of April. The mid-September–December period corresponds to the progressive destruction of the thermocline.
140 citations
TL;DR: In this paper, the molecular weight distribution of dissolved organic carbon (DOC) in pore waters from estuarine and continental margin sediments was examined using ultrafiltration techniques and it was found that the majority of the pore water DOC (∼60-90%) had a molecular weight less than 3 kDa.
140 citations
TL;DR: In this paper, the distribution of reactive iron in sediments of the northwestern shelf, the shelf edge and the abyssal part of the Black Sea has been studied, and it was shown that the iron enrichment of deep-water sediments is balanced by a loss of highly reactive iron from the oxic continental shelf, and that the majority of the dissolved iron efflux is redeposited on the continental shelf.
140 citations
TL;DR: In this paper, benthic chambers were used to measure in situ fluxes of dissolved gases (N2,O 2, and N2O) and inorganic nutrients (NO3,N H 4, and PO4� ) in continental shelf sediments of the Mid-Atlantic Bight during spring through autumn (May- November).
140 citations
TL;DR: In this paper, the anoxic water column degradation of fresh organic matter in this anoxic setting is similar to what has been previously observed in the open ocean, and the rate at which carbon is consumed increases as primary productivity increases.
Abstract: Organic carbon fluxes were measured in the anoxic water column of the Cariaco Basin under varying levels of primary productivity. Our results indicate that water column degradation of fresh organic matter in this anoxic setting is similar to what has been previously observed in the open ocean. Additionally, the rate at which carbon is consumed increases as primary productivity increases. These findings support the hypothesis that sulfate reduction is as efficient as aerobic respiration in degrading labile organic matter and that an anoxic water column does not necessarily result in an enhanced delivery of organic carbon to the sea floor. We estimate that 1‐2% of the organic carbon produced at the surface reaches the seafloor and that approximately 50% of this is preserved in the sediments. This burial efficiency is comparable to that previously reported for both oxic and anoxic settings, and with sedimentation rates similar to that in Cariaco Basin.
139 citations