中新世气候适宜期构造运动加速全球海洋碳循环

作     者：刘丰豪 杜金龙 黄恩清 马文涛 马小林 Lucas J.Lourens 田军 Fenghao Liu;Jinlong Du;Enqing Huang;Wentao Ma;Xiaolin Ma;Lucas J.Lourens;Jun Tian

作者机构：State Key Laboratory of Marine GeologyTongji UniversityShanghai 200092China State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China Department of Earth SciencesFaculty of GeosciencesUtrecht UniversityUtrecht CB 3584Netherlands 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2024年第69卷第6期

页      面：823-832页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：supported by the National Natural Science Foundation of China(42122042,42030403,and 42188102) the Fundamental Research Funds for the Central Universities(22120220531) the Shanghai Pilot Program for Basic Research the Netherlands Earth System Science Centre(024.002.001) 

主　　题：Global warming Eccentricity cycle Carbon cycle Low-latitude hydrological cycle 

摘      要：Global warming during the Miocene Climate Optimum(MCO,~17-14 million years ago)is associated with massive carbon emissions sourced from the flood basalt volcanism and ocean crustal ***,the perturbation of tectonic carbon degassing on the interaction between climate change and carbon cycle remains ***,through time-evolutive phase analysis of new and published high-resolution benthic foraminiferal oxygen(δ^(18)O)and carbon(δ^(13)C)isotope records from the global ocean,we find that variations in the marine carbon cycle lead the climate-cryosphere system(δ^(13)Clead-δ^(18)O)on 405,000-year eccentricity timescales during the *** is in contrast to the previously reported climate-lead-carbon(δ^(18)O-lead-δ^(13)C)scenario during most of the Oligo-Miocene(~34-6 million years ago).Further sensitivity analysis and model simulations suggest that the elevated atmospheric CO_(2) concentrations and the resulting greenhouse effect strengthened the low-latitude hydrological cycle during the MCO,accelerating the response of marine carbon cycle to eccentricity *** climate processes played a more important role in regulating carbon-cycle variations when Earth s climate was in a warm regime,as opposed to the dominant influence of polar ice-sheet dynamics during the PlioPleistocene(after~6 million years ago).