Long-chain alkenone-inferred temperatures from the last deglaciation to the early Holocene recorded by annually laminated sediments of the maar lake Sihailongwan, northeastern China ...

• Main Authors: Sun, Qing, Chu, Guoqiang, Xie, Manman, Ling, Yuan, Su, Youliang, Zhu, Qingzeng, Shan, Yabin, Liu, Jiaqi
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: SAGE Journals 2018
• Subjects: Geography; History; Greenland; Greenland ice cores; Ice Sheet
• Online Access: https://dx.doi.org/10.25384/sage.c.4040541; https://sage.figshare.com/collections/Long-chain_alkenone-inferred_temperatures_from_the_last_deglaciation_to_the_early_Holocene_recorded_by_annually_laminated_sediments_of_the_maar_lake_Sihailongwan_northeastern_China/4040541

Abrupt temperature changes during the last deglaciation are well recognized in Greenland ice cores and in deep-sea sediment records. On the continent of monsoonal Asia, however, only a few terrestrial temperature reconstructions extend to the Younger Dryas (YD). This hampers the understanding of how the Asian monsoon system responded to large-scale boundary changes in ice-sheet dynamics and reorganizations of atmospheric–oceanic circulation between the last deglaciation and the Holocene. Here, we report an alkenone-inferred temperature record from varved sediments of the maar lake Sihailongwan, northeastern China. Alkenone provides temperatures that represent the water temperature during the growing season when the lake is ice-free. Annually laminated sediments provide a reliable time control. Reconstructed temperatures reveal a distinctive pattern of variations during the last deglaciation: a temperature increase of 6°C at the onset of the Bølling–Allerød, two cold intervals (during the Older Dryas and the ...