Figures & data
Fig. 1 Map of the Arctic Ocean (Jakobsson, Macnab et al. Citation2008) with an inset showing the position of the cores from the 2007 Lomonosov Ridge off Greenland Expedition (LOMROG) in yellow, core PS2200-2/5 from the Morris Jesup Rise, core 96/12-1pc from the Lomonosov Ridge and core HLY0503-8JPC from the Mendeleev Ridge (orange). Also indicted are key cores from the Lomonosov Ridge, Arctic Coring Expedition (ACEX) and PS2185 and a core from the Lomonosov Ridge Intra Basin, HLY0503-18TC (red). White arrows indicate surface water and ice circulation pattern of the Transpolar Drift and the Beaufort Gyre.
Fig. 2 Correlation of the selected 2007 Lomonosov Ridge off Greenland Expedition cores based on Ca intensity variations. Ca data have been normalized by incoherent and coherent scattering.
Fig. 3 Correlation between core (a) PC-04, (b) PC-08 and (c) PS2200-2/5 with the planktic foraminiferal abundances per gram dry sediment (PF/g, shown with a red line), benthic foraminiferal abundance per gram (BF/g, shown with a blue line) and Ca counts normalized by incoherent and coherent scattering as the shaded grey areas. Chronology for core PS2200-2/5 as published by Spielhagen et al. (Citation2004) is given through Marine Isotope Stages (MIS) 1–7 and the correlated stages for cores PC-04 and PC-08 are indicated in PC-08. Benthic time marker events for Bulimina aculeata and Pullenia bulloides are indicated by green bars and the last appearance of Epistominella exigua by a green “T” for core PC-04 and the corresponding interval in core PC-08.
Table 1 Core locations for 2007 Lomonosov Ridge off Greenland Expedition cores and other cited cores.
Fig. 4 Other central Arctic Ocean cores from (a) Lomonosov Ridge (96/12), (b) Mendeleev Ridge (8JPC; Adler et al. Citation2009) and (c) the Morris Jesup Rise (PS2200-2/5; Spielhagen et al. Citation2004) show a strong general connection between foraminiferal abundance (red line) and Ca (black line).
Table 2 Age model for the studied cores PC-04 and PC-08.
