Sea-level reversal during Termination II
Sea-level reversal during Termination II
复制标题
第二次终止期间海平面逆转
作者：
M. Siddall;E. Bard;E. Rohling;C. Hemleben
倒数第二个冰期的终止（TII）与最后一个冰期的终止（TI）既有相似之处，也有不同之处。这两个终端显示出显着的冰后期变暖趋势的冷逆转。TI包括一个持续上升的海平面趋势，而TII可能表明海平面下降中途通过终止。我们提出了一个新的，连续的海平面记录TII来自红海δ 18 O记录，支持TII海平面反转的存在。该记录对TII海平面反转的结构进行了前所未有的观察，其中包括持续数千年的早期高点，随后海平面下降30 ± 12 m至40 ± 12 m，以及数千年的静止，最后海平面上升至海洋氧同位素阶段（MIS）5e间冰期。我们认为，海平面逆转和气候系统内部千年尺度的变化之间存在联系。
The termination of the penultimate glacial period (TII) shows both similarities and differences to the last termination (TI). Both terminations show significant cold reversals in the postglacial warming trend. TI consists of a continuously increasing sea-level trend, whereas TII may demonstrate a sea-level reduction midway through the termination. We present a new, continuous sea-level record for TII derived from Red Sea δ 18 O records that supports the existence of the TII sea-level reversal. The record gives an unprecedented look at the structure of the TII sea-level reversal, which consists of an early highstand lasting several millennia in duration, followed by a 30 ± 12 m to 40 ± 12 m reduction in sea level and a stillstand of several millennia, before the final sea-level rise to the marine oxygen isotope stage (MIS) 5e interglacial. We suggest that there is a link between the sea-level reversal and internal, millennial-scale variability in the climate system.