A Dry Episode during the Younger Dryas and Centennial to Decadal Scale Weak Monsoon Events during the Early Holocene: A High-Resolution Stalagmite Record from Southeast of the Loess Plateau, China

HR: 17:45h
AN: PP14A-07 [Abstracts]
TI: A Dry Episode during the Younger Dryas and Centennial to Decadal Scale Weak Monsoon Events during the Early Holocene: A High-Resolution Stalagmite Record from Southeast of the Loess Plateau, China
AU: Cai, B
EM: cai_bg@mail.iggcas.ac.cn
AF: Institute of Geology and Geophysics, Chinese Academy of Science, NO.19 Beitucheng Xilu,Chaoyang District, Beijing, 100029,
AU: * Cheng, H
EM: cheng021@umn.edu
AF: Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury DR SE,Pillsbury Hall 108, Minneapolis, MN 55455,
AU: Tan, M
EM: tanming@mail.iggcas.ac.cn
AF: Institute of Geology and Geophysics, Chinese Academy of Science, NO.19 Beitucheng Xilu,Chaoyang District, Beijing, 100029,
AU: Wang, X
EM: wang0452@umn.edu
AF: Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury DR SE,Pillsbury Hall 108, Minneapolis, MN 55455,
AU: Wang, X
EM: xuking@mail.iggcas.ac.cn
AF: Institute of Geology and Geophysics, Chinese Academy of Science, NO.19 Beitucheng Xilu,Chaoyang District, Beijing, 100029,
AU: Liu, T
EM: tsliu@mail.iggcas.ac.cn
AF: Institute of Geology and Geophysics, Chinese Academy of Science, NO.19 Beitucheng Xilu,Chaoyang District, Beijing, 100029,
AB: A high-resolution stalagmite oxygen isotope record from Dongshiya Cave, located southeast of the China Loess Plateau, reveals detailed climatic oscillations between 12.7 and 9.0 ka BP on centennial to decadal timescales, with a temporal resolution of 1 to 20 years. The Younger Dryas event in the record began with a gradual increase in δ¹⁸O values, followed by a climate related depositional hiatus between 12.1 and 11.5 ka BP, implying a weak East Asia Monsoon or dry climate southeast of the Loess Plateau. At least eight weak monsoon events between 11.5 and 9.0 ka BP characterize the record of the East Asian Monsoon, events which are likely tied to cold events over Greenland. The spectral analysis of Dongshiya ¹⁸O time series yields spectral peaks at solar frequencies, indicating that solar changes maybe, at least partially, responsible for changes in the intensity of the East Asia Monsoon during the early Holocene.
DE: 1605 Abrupt/rapid climate change (4901, 8408)
DE: 3344 Paleoclimatology (0473, 4900)
DE: 4901 Abrupt/rapid climate change (1605)
DE: 4958 Speleothems
DE: 9320 Asia
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Fall Meeting