A penultimate glacial monsoon record from Hulu Cave and two-phase glacial terminations

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doi: 10.1130/G22289.1
Author(s): Cheng, Hai; Edwards, R. Lawrence; Wang Yongjin; Kong Xinggong; Ming Yanfang; Kelly, Megan J.; Wang, Xianfeng; Gallup, Christina D.; Liu Weiguo
Author Affiliation(s): Primary:
University of Minnesota, Department of Geology and Geophysics, Minneapolis, MN, United States
Nanjing Normal University, China
Chinese Academy of Sciences, China
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 34(3), p.217-220. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. With GSA Data Repository Item 2006040. 29 refs.; illus.
Summary: Oxygen isotope records of three stalagmites from Hulu Cave, China, extend the previous high-resolution absolute-dated Hulu Asian Monsoon record from the last to the penultimate glacial and deglacial periods. The penultimate glacial monsoon broadly follows orbitally induced insolation variations and is punctuated by at least 16 millennial-scale events. We confirm a Weak Monsoon Interval between 135.5±1.0 and 129.0±1.0 ka, prior to the abrupt increase in monsoon intensity at Asian Monsoon Termination II. Based on correlations with both marine ice-rafted debris and atmospheric CH4 records, we demonstrate that most of marine Termination II, the full rise in Antarctic temperature and atmospheric CO2, and much of the rise in CH4 occurred within the Weak Monsoon Interval, when the high northern latitudes were probably cold. From these relationships and similar relationships observed for Termination I, we identify a two-phase glacial termination process that was probably driven by orbital forcing in both hemispheres, affecting the atmospheric hydrological cycle, and combined with ice sheet dynamics.
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 24 Surficial Geology, Quaternary Geology; Asia; Atlantic Ocean; Cave environment; Cenozoic; China; Correlation; Cycles; Deglaciation; Eastern China; Far East; Foraminifera; Geochemistry; Glacial environment; Glaciation; Hulu Cave; Insolation; Interglacial environment; Interstadial environment; Invertebrata; Isotope ratios; Isotopes; Leg 162; Microfossils; Monsoons; North Atlantic; Northeast Atlantic; O-18/O-16; ODP Site 980; Ocean Drilling Program; Oxygen; Paleo-oceanography; Paleoclimatology; Paleohydrology; Pleistocene; Protista; Quaternary; Sea-surface temperature; Solution features; Speleothems; Stable isotopes; Stalagmites; Terrestrial environment; Two-phase models; Upper Pleistocene
Coordinates: N552906 N552906 W0144208 W0144208
N323000 N323000 E1191000 E1191000
Record ID: 2006028138
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States