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首页> 外文期刊>Paleoceanography >Aeolian process and climatic changes in loess records from the northeastern Tibetan Plateau: Response to global temperature forcing since 30ka
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Aeolian process and climatic changes in loess records from the northeastern Tibetan Plateau: Response to global temperature forcing since 30ka

机译：青藏高原东北部黄土记录的风成过程和气候变化：30ka以来对全球温度强迫的响应

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摘要

The response of surface processes to global climatic changes since the last glacial is critical to understanding the mechanism of climatic changes on the Tibetan Plateau. In this study, loess from the northeastern Tibetan Plateau (NETP) was closely spaced dated to provide an independent high-resolution record of dust accumulation processes and millennial-scale climatic changes. Optically stimulated luminescence ages reveal episodes of rapid dust deposition at approximately 12.3ka, 16ka, 21-23ka, 25-28ka, and possibly also at 30-33ka. These episodes are broadly correlated with high-latitude and marine records cold climatic events, such as the Younger Dryas, Heinrich event 1, and the Last Glacial Maximum. This correlation implies that dust storms in the NETP represent episodic aridification and wind strengthening, which is ascribed to the southward shift of the polar front and the intensification of the Siberian high-pressure cell that was forced by millennial-scale cooling in high northern latitudes.
机译：自上次冰川以来，地表过程对全球气候变化的响应对于了解青藏高原的气候变化机制至关重要。在这项研究中，来自青藏高原东北部（NETP）的黄土相距很近，以提供独立的高分辨率记录尘埃积累过程和千年尺度的气候变化。光学激发的发光年龄揭示了在约12.3ka，16ka，21-23ka，25-28ka以及可能在30-33ka处快速沉积灰尘的情况。这些事件广泛地与高纬度和海洋记录的寒​​冷气候事件相关，例如Younger Dryas，Heinrich事件1和Last Glacial Maximum。这种相关性表明，NETP中的沙尘暴代表了偶发的干旱化和风的增强，这归因于极地锋的南移和北高纬度地区千年尺度降温导致的西伯利亚高压单元的强化。

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