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, more Also appears 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., more |  |
| Keywords | 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, Antarctic Ocean [Marine Regions]; PSW, South Atlantic [Marine Regions]
Marine/Coastal |
| Authors | | Top | - Anderson, R.F.
- Kumar, N.
- Mortlock, R.A.
- Froelich, P.N.
| - Kubik, P.
- Dittrich-Hannen, B.
- Suter, M.
| |
| 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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