Holocene forcing of East Asian hydroclimate recorded in a subtropical peatland from southeastern China

Holocene forcing of East Asian hydroclimate recorded in a subtropical peatland from southeastern China
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中国东南部亚热带泥炭地记录的全新世东亚水文气候强迫

DOI:
10.1007/s00382-022-06333-x
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发表时间:
2022-06
期刊:
影响因子:
4.6
通讯作者:
Shucheng Xie
Shucheng Xie
中科院分区:
地球科学2区
文献类型:
--
作者:
Xianyu Huang;Hongbin Zhang;Michael L. Griffiths;Bingyan Zhao;Francesco S. R. Pausata;Clay Tabor;Junwu Shu;Shucheng Xie

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全新世东亚夏季风(EASM)的水文气候演变及其机制一直存在争议,尤其是在中国东南部。在这里,我们提出了一个多代理泥炭记录的季风演变从中国东南部覆盖过去14万年。我们的新记录显示,在全新世早期(10至8 ka)和晚期(5.4 ka后),一个相对较弱的东亚夏季风,但潮湿的水文气候,而较强的东亚夏季风和整体干燥的气候在全新世中期(8至5.4 ka)。与附近的洞穴记录一致,我们的研究结果揭示了在最后一次冰消期和全新世早期,北纬度冰盖融水对千年尺度东亚水文气候变化的主导控制。然而,一旦全球海平面在全新世中晚期稳定下来,这种主导影响可能会减弱,让位于季风和水文气候的其他驱动因素,包括夏季日照和与植被灰尘反馈相关的遥相关模式。
The Holocene hydroclimate evolution and underlying mechanisms modulating the East Asian summer monsoon (EASM) remains controversial, especially in south eastern China. Here we present a multiproxy peat record of monsoon evolution from southeastern China covering the last 14 ka. Our new records show a relatively weaker EASM but wetter hydroclimate during the early (10 to 8 ka) and late Holocene (after 5.4 ka), while a stronger EASM and overall drier climate during the mid-Holocene (8 to 5.4 ka). In line with nearby speleothem records, our results reveal a dominant control of the northern-latitude ice-sheet meltwater forcing on millennial-scale East Asian hydroclimate variability during the last deglaciation and early Holocene. This dominant influence, however, likely waned once the global sea level had stabilized during the mid-to-late Holocene, giving way to other drivers of the monsoon and hydroclimate, including a combination of summer insolation and teleconnection patterns associated with vegetation-dust feedbacks.
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