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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Late-Quaternary changes in productivity of the Southern Ocean Anderson, R.F.; Kumar, N.; Mortlock, R.A.; Froelich, P.N.; Kubik, P.; Dittrich-Hannen, B.; Suter, M. (1998). Late-Quaternary changes in productivity of the Southern Ocean. J. Mar. Syst. 17(1-4): 497-514. https://dx.doi.org/10.1016/S0924-7963(98)00060-8 In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963; e-ISSN 1879-1573, meer Ook verschenen in: Le Fèvre, J.; Tréguer, P. (Ed.) (1998). Carbon Fluxes and Dynamic Processes in the Southern Ocean: Present and Past. Selected papers from the International JGOFS Symposium, Brest, France, 28-31 August 1995. Journal of Marine Systems, 17(1-4). Elsevier: Amsterdam. 1-619 pp., meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 288476 [ aanvragen ]

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Trefwoorden

Biological production Chemical elements > Metals > Rare earths > Actinides > Uranium Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle > Nutrient cycles > Carbon cycle Geological time > Phanerozoic > Geological time > Cenozoic > Quaternary Ice edge Isotopes > Radioisotopes Minerals > Silicate minerals > Opal Organic matter > Carbon > Organic carbon Palaeo studies > Ecology > Palaeoecology Palaeo studies > Oceanography > Palaeoceanography Particulate flux Sediments > Biogenic deposits PS, Antarctische Oceaan [Marine Regions]; PSW, South Atlantic [Marine Regions] Marien/Kust

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Auteurs		Top
Anderson, R.F. Kumar, N. Mortlock, R.A. Froelich, P.N.	Kubik, P. Dittrich-Hannen, B. Suter, M.

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Abstract

Paleoceanographic records based on new proxies of export production have been constructed for the South Atlantic sector of the Southern Ocean. A radionuclide-ratio proxy of particle flux (Full-size image (<1 K)) and the accumulation rate of authigenic uranium, which responds to the flux of organic carbon to the sea bed, both indicate a dramatic increase, compared to the present, in the export production of the Subantarctic zone (approximately the region between the present-day positions of the Subtropical Convergence and the Antarctic Polar Front) during glacial periods. If the South Atlantic is representative of the entire Southern Ocean, then export production in the Southern Ocean during the Last Glacial Maximum was substantially greater than at present. Previous studies, focusing on the burial of biogenic opal, failed to recognize the glacial increase in export production of the Southern Ocean because of a strong non-linearity between accumulation rates of opal and of organic carbon.

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