Decoupled warming and monsoon precipitation in East Asia over the last deglaciation
作者： Francien Peterse , Maarten A. Prins , Christiaan J. Beets , Simon R. Troelstra , Hongbo Zheng
DOI: 10.1016/J.EPSL.2010.11.010
关键词:
摘要: Our understanding of the continental climate development in East Asia is mainly based on loess-paleosol sequences and summer monsoon precipitation reconstructions oxygen isotopes (delta O-18) stalagmites from several Chinese caves. Based these records, it thought that Asian Summer Monsoon (EASM) generally follows Northern Hemisphere (NH) insolation. However, not much known about magnitude timing deglacial warming continent. In this study we reconstruct air temperatures for central China covering last 34,000 yr, distribution fossil branched tetraether membrane lipids soil bacteria a sequence Mangshan loess plateau. The results indicate temperature varied phase with NH insolation, onset at similar to 19 kyr BP parallel other records e.g. Antarctica, southern Africa South-America. increased from-IS C maximum -27 degrees early Holocene (similar 12 BP), agreement increase inferred pollen phytolith data, permafrost limits China. Comparison lipid-derived record proxy stalagmite 5180 shows strengthening EASM lagged by ca. 3 kyr. Moreover, intense formation deposits, caused substantial increases precipitation, only started around (ca. 7 lag). thus show intensification unambiguously may contribute better mechanisms controlling ice age terminations.
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