Centennial scale climate oscillations from southern Siberia in the Last Glacial Maximum
| Autor: | Mirko van der Baan, Ryan Borowiecki, Pavel E. Tarasov, Rui Zhang, Stefanie Müller, Taslima Anwar, Vadim A. Kravchinsky, Avto Goguitchaichvili |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Archeology
Global and Planetary Change 010504 meteorology & atmospheric sciences δ18O Climate change Geology Last Glacial Maximum Vegetation 010502 geochemistry & geophysics 01 natural sciences Greenland ice core project Centennial 13. Climate action Loess Physical geography Ecology Evolution Behavior and Systematics Holocene 0105 earth and related environmental sciences |
| Zdroj: | Quaternary Science Reviews. 270:107171 |
| ISSN: | 0277-3791 |
| DOI: | 10.1016/j.quascirev.2021.107171 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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