Ice-volume-forced erosion of the Chinese Loess Plateau global Quaternary stratotype site.

Ice-volume-forced erosion of the Chinese Loess Plateau global Quaternary stratotype site.
复制标题

DOI:
10.1038/s41467-018-03329-2
复制
发表时间:
2018-03-07
影响因子:
16.6
通讯作者:
Lu H
Lu H
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Stevens T;Buylaert JP;Thiel C;Újvári G;Yi S;Murray AS;Frechen M;Lu H

文献摘要

参考文献

被引文献

相似文献

国际地层学委员会(ICS)利用基准年代地层学来划分地质时间。这些记录的可靠性是了解过去全球变化的基础。本文采用迄今为止发表的最详细的发光测年模型,表明黄土高原沙漠边缘靖边第四纪陆相剖面的ICS年代学是不准确的。在动态的沟壑地貌中表现出巨大的断裂和沉积变化,表明东亚沙漠边缘的环境变化迅速。我们提出了一个新的独立的年龄模式,重建了最近~250 ka的季风气候和沙漠扩张/收缩。研究表明,冰量对沙漠扩张、沙尘动态和沉积物保存的影响占主导地位,并进一步表明东亚夏季风(EASM)的变化与冰量的变化密切相关,但滞后于日照~5 ka。这些观测结果表明,季风边缘的东亚季风不直接响应岁差强迫。重建过去环境变化的一个基本要求是准确了解沉积年龄。在这里,作者表明,中国基准档案的解释是不准确的,冰体积主要控制着该地点的沙漠动态、沉积物保存和降水。
The International Commission on Stratigraphy (ICS) utilises benchmark chronostratigraphies to divide geologic time. The reliability of these records is fundamental to understand past global change. Here we use the most detailed luminescence dating age model yet published to show that the ICS chronology for the Quaternary terrestrial type section at Jingbian, desert marginal Chinese Loess Plateau, is inaccurate. There are large hiatuses and depositional changes expressed across a dynamic gully landform at the site, which demonstrates rapid environmental shifts at the East Asian desert margin. We propose a new independent age model and reconstruct monsoon climate and desert expansion/contraction for the last ~250 ka. Our record demonstrates the dominant influence of ice volume on desert expansion, dust dynamics and sediment preservation, and further shows that East Asian Summer Monsoon (EASM) variation closely matches that of ice volume, but lags insolation by ~5 ka. These observations show that the EASM at the monsoon margin does not respond directly to precessional forcing. A basic requirement for reconstructing past environmental change is accurate understanding of sediment age. Here, the authors show that the interpretation of a benchmark archive in China has been inaccurate, and that ice volume primarily controls desert dynamics, sediment preservation, and precipitation at the site.
40万年日照变化最小值期间北极冰盖的延迟形成
DOI: 10.1038/nature11493
发表时间: 2012-10-18
期刊: NATURE
影响因子: 64.8
作者:
Hao, Qingzhen;Wang, Luo;Guo, Zhengtang
通讯作者: Guo, Zhengtang
DOI: 10.1016/j.quageo.2006.05.028
发表时间: 2007-01-01
影响因子: 2.7
作者:
Buylaert, J. P.;Vandenberghe, D.;Van den Haute, P.
通讯作者: Van den Haute, P.
DOI: 10.1016/j.quageo.2007.05.003
发表时间: 2008-02-01
影响因子: 2.7
作者:
Buylaert, J. P.;Murray, A. S.;Van den haute, P.
通讯作者: Van den haute, P.
DOI: 10.1016/s1350-4487(02)00170-1
发表时间: 2003-04-01
影响因子: 2
作者:
Duller, GAT
通讯作者: Duller, GAT
DOI: 10.1016/j.radmeas.2017.07.005
发表时间: 2018-02-01
影响因子: 2
作者:
Colarossi, D.;Duller, G. A. T.;Roberts, H. M.
通讯作者: Roberts, H. M.