A warmer but drier Marine Isotope Stage 11 during the past 650 ka as revealed by the thickest loess on the western Chinese Loess Plateau

作     者：SHI Peihong YANG Taibao TIAN Qingchun LI Chengxiu 

作者机构：College of Tourism and Environment Shaanxi Normal University Xi'an 710119 China State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Institute of Glaciology and Ecogeography College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China College of Geographical Science Shanxi Normal University Linfen 041000 China Remote Sensing Laboratories Department of Geography University of Zurich-Irchel Winterthurerstrasse 190 CH-8057 Zurich Switzerland 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2016年第8卷第3期

页      面：315-330页

核心收录：

学科分类：082802[工学-农业水土工程] 0709[理学-地质学] 0907[农学-林学] 07[理学] 08[工学] 09[农学] 0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 070903[理学-古生物学与地层学(含：古人类学)] 090707[农学-水土保持与荒漠化防治] 0828[工学-农业工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0705[理学-地理学] 

基　　金：joint supported by the National Natural Science Foundation of China (41401226, 41271024) the China Postdoctoral Science Foundation (2015M570865) 

主　　题：Marine Isotope Stage 11 loess paleosol interglacial Holocene paleoclimate wavelet analysis 

摘      要：Marine Isotope Stage 11（MIS 11; ca. 423-362 ka） is generally considered to be the best analogue for the present interglacial（Holocene）, and investigation of it will improve our understanding of current climate variability and assist in predictions of future climate change. However, many recent studies primarily focus on the structure and duration of MIS 11. Little research has focused on climate warmth and stability recorded in the Chinese loess-paleosol sequences（LPS） during the S4 paleosol formation（equivalent to MIS 11）. On the basis of previous work, this study presents a high-resolution record（ca. 75 a/cm） that spans from MIS 1 to MIS 15, as preserved in the thickest known Jingyuan loess section on the western Chinese Loess Plateau（CLP）. This LPS is almost 165 m thick and was sampled from the upper part of L6 to the modern soil at 2-cm depth intervals. Measurements of magnetic susceptibility, mean grain size and ＆gt;63 μm particle content, carbonate content, total organic carbon, and soil color of samples were made to reconstruct the paleoclimate variation, and a grain-size age model was used to constrain the chronological framework. The primary results show that a generally warm-humid climate dominated the S4 paleosol development, but the climate condition was extremely unstable during the whole of MIS 11. Two obviously different climate regimes controlled the MIS 11 climate variation： the early part of MIS 11 was extremely warm and stable, but the latter part was relatively cool（non-glacial） and unstable. This climate pattern was consistent with records on the central CLP and wavelet analysis suggested that it was forced by the 65°N insolation variability modulated by a quasi-100-ka cycle. In addition, a multi-proxy comparative study on the climate conditions during S0 to S5 paleosol development indicates that the period of S4 development might be the warmest interglacial of the past 650 ka. However, the climate condition during S4 development was not the mos