上新世数值模拟揭示气候周期空间差异的机理  

Simulations reveal causes of inter-regional differences in Pliocene climatic periodicity

作　　者：黄晓芳 杨石岭 Alan Haywood Julia Tindall 姜大膀 王永达 孙敏敏 张师豪 丁仲礼 Xiaofang Huang;Shiling Yang;Alan Haywood;Julia Tindall;Dabang Jiang;Yongda Wang;Minmin Sun;Shihao Zhang;Zhongli Ding(Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;School of Earth and Environment,University of Leeds,Leeds LS29JT,UK;Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China Xiaofang Huang,Shiling Yang1,2,Alan Haywood3,Julia Tindall3,Dabang Jiang4,2,Yongda Wang,Minmin Sun 1,2,Shihao Zhang1,2,Zhongli Ding)

机构地区：[1]Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [2]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Earth and Environment,University of Leeds,Leeds LS29JT,UK [4]Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Science Bulletin》2023年第2期146-149,M0003,共5页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(41725010 and 42107472);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB26000000 and XDB31000000);the Key Research Program of the Institute of Geology&Geophysics,Chinese Academy of Sciences(IGGCAS-201905)。

摘　　要：上新世(5.33~2.58 Ma)是距今最近的大气CO_(2)浓度超过400 ppmv的暖期,是理解未来气候变化的地质历史相似型.地质记录显示,上新世气候主要响应地球倾角和岁差变化,比如深海氧同位素和高纬陆相记录表现出强的倾角周期(41 ka),低纬和地中海地区的粉尘和花粉记录以岁差周期(21 ka)为主.然而,这些气候周期空间差异的机制尚不清楚.我们使用全球海气耦合模式HadCM3,开展了轨道参数极值实验.结果表明:(1)倾角变化主要对高纬温度影响显著(>5℃),很好地解释了高纬记录和受高纬冰量调节的深海氧同位素记录的41 ka周期;(2)岁差变化主要影响低纬降水(>2 mm d-1),很好地解释了低纬和地中海地区与季风活动相关的21 ka气候周期.The Pliocene Epoch(5.33–2.58 Ma)is the last period of sustained warmth before the emergence of the large-scale Pleistocene glaciations.This period was generally warm and wet and is often used as an analogue for near-future climate conditions in terms of CO2 levels(
400 ppm,1 ppm=1 lmol/mol),and comparable temperatures.Evaluating the climate system and its fluctuation patterns during the Pliocene warm period provide scientists with the opportunity to understand a warmer-than-present world,and are fundamental to our understanding and ability to accurately project future climate and environmental change.

关 键 词：气候周期 地中海地区 上新世 轨道参数 地质记录 高纬 

分 类 号：P467[天文地球—大气科学及气象学]