[MIS10-P03] Reconstruction of sea-surface temperature change during the late Pliocene to early Pleistocene using Garda Drift sediment in the North Atlantic Ocean
Keywords:Atlantic Meridional Overturning Circulation, Sea-surface temperature, Pliocene-Pleistocene boundary
As a result, the amplitude of SST variations were enhanced after the boundary between Pliocene and Pleistocene, and the spike-like falls of SST were detected at 2.62Ma, 2.52Ma, and 2.43Ma, corresponding to MIS104, MIS100, and MIS 96, respectively. Compared the SST variations with the numbers of ice rafted debris (IRD) and variations in strength of deep water current (those data will be presented by Hayashi et al. in this meeting) and global ice volume (LR04), the amplitudes were different each other, but the timings of changes were in agreement with each other. On the other hand, some changes appeared in both SST and the strength of deep water current were not appeared in LR04, suggesting that SST variation observed at U1314 Site was influenced by the variation in strength of NADW, that is the strength of AMOC.