Five plankton groups, including diatoms, radiolarians, coccolithophores, foraminifers, and dinoflagellate cysts, were synoptically analyzed in six sediment cores and two sediment traps from the Norwegian-Greenland Sea and the North Atlantic in order to provide more detailed insights into the paleoclimatic and paleoceanographic evolution and the development of plankton assemblages of the northern North Atlantic during the last 15,000 years. Based on Q-mode factor analyses, cold, warm, transitional, and relict assemblages were calculated for each of the plankton groups. Data from the different plankton groups complement one another, although they are not always consistent. However, the multiple plankton-group data set is able to bridge intervals in which single groups lack preservation or the ability to react to changes. Synoptically interpreted, the results provide a detailed picture of the response of plankton assemblages to environmental changes during the time period investigated, which includes the B0lling/Aller0d interstadial, the Younger Dryas cold spell, Termination IB, and, in all likelihood, also the "8,200 Event", and the Hypsithermal (approximately 8-4 14C ky BP).

Supplement to: Hass, H Christian; Andruleit, Harald; Baumann, Astrid; Baumann, Karl-Heinz; Kohly, Alexander; Jensen, Stefan; Matthiessen, Jens; Samtleben, Christian; Schäfer, Priska; Schröder-Ritzrau, Andrea; Thiede, Jörn (2001): The potential of synoptic plankton analyses for paleoclimatic investigations: five plankton groups from the Holocene nordic seas. In: Schäfer, W; Ritzrau, M; Schlüter & J. Thiede (eds.) The Northern North Atlantic: A Changing Environment, Springer Verlag, Berlin, 500 pp, 291-318