![]() ![]() ![]() We used the calculated accumulation rate of microfossils (AR, fluxes) of the main ecological groups and species indicative of radiolarians and of BF as quantity responses in their production, which is related to environmental and hydrological changes of the water column and surface sediment in the central OS and to global and regional climate changes. ![]() The response of benthic foraminifera (BF) and radiolarian production in the central Okhotsk Sea (OS) to orbital and millennial changes of climate and environment over the last 136 kyr have been studied on the basis of the sediment core PC-7R, with available productivity, geochemical and lithological records and a modified age model. This image dataset helps to fill the gaps in the practical micropaleontological analysis of benthic foraminifera giving better information for the species identification from the modern and Pleistocene sediments. The dominants, subdominants and species list of benthic foraminifera changed within the core depth. In the core AMK-5890, the benthic foraminifera assemblage consists of 63 species some of which were combined into one genus (for example, Fissurina sp.). The benthic foraminifera assemblages are a reliable indicator for paleooceanographic and ecological reconstructions describing the environments on the bottom in present and past. In the area of study, dense cold water masses of the East Greenland Current from the Nordic Seas contact and mix with warm salty water of the Irminger Current from the North Atlantic Ocean creating specific conditions for the benthic microfauna habitat which reflect forming the lower link of the global thermohaline circulation. The article presents an image dataset of benthic foraminifera assemblage in long sediment core AMK-5890 obtained during the 71st cruise of the research vessel Akademic Mstislav Keldysh in summer 2018 from the northwestern Iceland slope in Denmark Strait (North Atlantic Ocean). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |