@proceedings {3780, title = {Paleoceanographic-Paleoclimatic variability during S1 sapropel deposition in the NE Mediterranean Sea: Calcareous nannoplankton implications}, journal = {10th Symposium on Oceanography and Fishery}, volume = {Proceeding}, year = {2012}, pages = {10 pp. (in Greek)}, abstract = {Detailed quantitative analyses of calcareous nannofossils/coccolithophores performed on the deep sea deposits of the north eastern Mediterranean Sea; two gravity core from North Aegean Sea (SL 152) and south Cretan continental margin (HCMR 2/22), with a focus on the regional expression of sapropel S1 deposition. In both sites, higher values of Florisphaera profunda, Helicosphaera spp., Braarudosphaera bigelowii and the concomitant increase of stratification S index, within sapropel intervals can be interpreted as the result of elevated marine production and enhanced inflow of fresh water input during the S1 period. A series of cooling events detected within the S1 depositional interval, may be linked to outbursts of cold northerly air masses and relevant pulses in the deep-intermediate water ventilation that caused the temporary cessation of S1 deposition between 7.8-7.5 ka uncal. BP in North Aegean and 8.1-7.8 ka uncal. BP at the south Cretan margin. During this interval the peak of Braarudosphaera bigelowii, the decrease in abundance of Florisphaera profunda, Helicosphaera spp., Rhabdosphaera spp. and a general increase in NPP are related to a shoaling of the nutricline and higher production in the surface layer.}, url = {http://okeanos-dspace.hcmr.gr/handle/123456789/1237}, author = {Athanasiou, M., and Triantaphyllou, M., and Dimiza, M., and Gogou, A., and Roussakis, G., and Lykousis, V.,} }