Centennial scale climate oscillations from southern Siberia in the Last Glacial Maximum

• Published in: Quaternary science reviews 2021-10, Vol.270, p.107171, Article 107171
• Main Authors: Kravchinsky, Vadim A., Zhang, Rui, Borowiecki, Ryan, Tarasov, Pavel E., van der Baan, Mirko, Anwar, Taslima, Goguitchaichvili, Avto, Müller, Stefanie
• Format: Article
• Language: English
• Subjects: Climate change; Continental climate; Holocene; Last glacial maximum; Pollen concentration; Spectral analysis
• ISSN: 0277-3791; 1873-457X
• DOI: 10.1016/j.quascirev.2021.107171

A lack of adequate high resolution climate proxy records for the Last Glacial Maximum (LGM) has prevented the extrapolation of climate–solar linkages on centennial time scales prior of the Holocene. Therefore, it is still unknown whether centennial climate variations of the last ten thousand years convey a universal climate change or merely represent a characteristic of the Holocene. Recently published high resolution climate proxy records for the LGM allowed us to extrapolate climate–solar linkages on centennial time scales ahead of the Holocene. Here we present the analysis of a high resolution pollen concentration record from Lake Kotokel in southern Siberia, Russia, during the LGM. The record reflects the dynamics of vegetation zones and temperature change with a resolution of ∼40 years in the continental climate of north-eastern Asia. We demonstrate that our pollen concentration record, the oxygen isotope δ18O record from the Greenland ice core project NGRIP (NorthGRIP), the dust-fall contributions in Lake Qinghai, China, grain size in the Gulang and Jingyuan loess deposits, China, and the composite oxygen isotope δ18O record from the Alpine cave system 7H reveal cooler to warmer climate fluctuations between ∼ 20.6 and 26 ka. Such fluctuations correspond to the ∼1000-yr, 500-600-yr and 210-250-yr cycles possibly linked to the solar activity variations and recognized in high resolution Holocene proxies all over the world. We further show that climate fluctuations in the LGM and Holocene are spectrally similar suggesting that linkages between climate proxies and solar activity at the centennial time scale in the Holocene can be extended to the LGM. •Centennial scale climate oscillations in the Large Glacial Maximum are evaluated.•The LGM oscillations are shown to be similar to the Holocene climate cycles.•The 1000 and 500-600-yr oscillations appear to be linked to the solar radiation changes.•The 210-250-year cycle can be attributed to the de Vries/Suess solar cycle.