The Early-Middle Pleistocene Transition： characterization and proposed guide for the defining boundary

作     者：Martin J. Head Brad Pillans Sarah A. Farquhar 

作者机构：Department of Earth Sciences Brock University St Catharines Ontario L2S 3A1 Canada. Research School of Earth Sciences The Australian National University Canberra ACT 0200 Australia. Cambridge Quaternary Department of Geography University of Cambridge Downing Place Cambridge CB2 3EN United Kingdom. 

出 版 物：《Episodes》 (地质幕（英文版）)

年 卷 期：2008年第31卷第2期

页      面：255-259页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0704[理学-天文学] 

主　　题：地球 气候状态 洪积世 振幅 

摘      要：The mid-Pleistocene transition （MPT, c. 1.2 to 0.5 Ma） records fundamental changes in Earth＇s climate state, where low-amplitude 41-kyr obliquity-dominated cycles gave way progressively to the high-amplitude, quasiperiodic （c. 100-kyr） fluctuations that characterize the later Pleistocene and Holocene. We use wavelet analysis on the LR04 δ^l8O benthic foraminiferal stack to confirm low-frequency power as early as 1.25-1.20 Ma, determine the persistence of obliquity-dominated cyclicity through and beyond the MPT, and reveal new levels of complexity in climate evolution.