scholarly journals Supplemental Material: New chronology of the Chinese loess-paleosol sequence by leaf wax δD records during the past 800 k.y.

2021 ◽  
Author(s):  
Zheng Wang ◽  
Weiguo Liu ◽  
et al.
Keyword(s):  
Spectrum Analysis ◽  
Chinese Loess ◽  
The Past ◽  
Leaf Wax

Materials, methods, and interpretations, Figure S1 (site description and loess records from layer S1), Figure S2 (comparing δD<sub>wax</sub> of layer S2 in central and south CLP), Figure S3 (spectrum analysis of loess δD<sub>wax</sub>), and Figure S4 (the differences between two age-models in paleosol and loess layers).<br>

scholarly journals Supplemental Material: New chronology of the Chinese loess-paleosol sequence by leaf wax δD records during the past 800 k.y.

2021 ◽  
Author(s):  
Zheng Wang ◽  
Weiguo Liu ◽  
et al.
Keyword(s):  
Spectrum Analysis ◽  
Chinese Loess ◽  
The Past ◽  
Leaf Wax

Materials, methods, and interpretations, Figure S1 (site description and loess records from layer S1), Figure S2 (comparing δD<sub>wax</sub> of layer S2 in central and south CLP), Figure S3 (spectrum analysis of loess δD<sub>wax</sub>), and Figure S4 (the differences between two age-models in paleosol and loess layers).<br>

scholarly journals New chronology of the Chinese loess-paleosol sequence by leaf wax δD records during the past 800 k.y.

Geology ◽  
2021 ◽  
Author(s):  
Zheng Wang ◽  
Weiguo Liu ◽  
Hong Wang ◽  
Yunning Cao ◽  
Jing Hu ◽  
...  
Keyword(s):  
Global Climate ◽  
Last Interglacial ◽  
Chinese Loess ◽  
The Past ◽  
Leaf Wax ◽  
Climate Event ◽  
Δ18o And Δd ◽  
Climate Events ◽  
Plant Wax ◽  
Hydrogen Isotopic Composition

The Chinese loess-paleosol sequences provide important archives for studying paleoenvironmental changes. However, the lack of independent and accurate time scales hinders the study between loess and other records. Asian stalagmite δ18O records indicate synchronous patterns of paleoprecipitation δ18O over large geographic regions. The record of hydrogen isotopic composition of plant wax (δDwax) in Chinese loess is also controlled by rainwater δD. Both share a common origin. The linear relationship between rainfall δ18O and δD variance provides the basis to tie together chronologies of the same climate event in different records. Here, we show a new loess chronology by correlating chronologies of marker boundaries of the prominent climate chronozones in stalagmite δ18O and summer insolation to the equivalent climate stratigraphy in the loess δDwax sequence. We first developed and tested this novel methodology with data since the last interglacial on a millennial scale, and then applied this approach to the loess δDwax sequence for the past 800 k.y. to improve the traditional chronology based on magnetic susceptibility and grain size. The new δDwax time series provides not only an improved chronology for studying paleoclimate changes during interglacial intervals, it also represents a unique database with which to better understand the links between the Asian monsoon changes in the Chinese loess and other global climate events, especially for the periods prior to 640 ka, for which stalagmite records are not available.

Hydroclimatic variability in loess δDwax records from the central Chinese Loess Plateau over the past 250 ka

2018 ◽  
Vol 155 ◽  
pp. 49-57 ◽  
Author(s):  
Zheng Wang ◽  
Zhisheng An ◽  
Zhonghui Liu ◽  
Xiaoke Qiang ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
Hydroclimatic Variability

Drought variation trends in different subregions of the Chinese Loess Plateau over the past four decades

2012 ◽  
Vol 115 ◽  
pp. 167-177 ◽  
Author(s):  
Baoqing Zhang ◽  
Pute Wu ◽  
Xining Zhao ◽  
Yubao Wang ◽  
Jiawen Wang ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
Variation Trends ◽  
The Chinese Loess Plateau

Climate change-induced drought evolution over the past 50 years in the southern Chinese Loess Plateau

2019 ◽  
Vol 122 ◽  
pp. 104519 ◽  
Author(s):  
Shengnan Zhang ◽  
Yiping Wu ◽  
Bellie Sivakumar ◽  
Xingmin Mu ◽  
Fubo Zhao ◽  
...  
Keyword(s):  
Climate Change ◽  
Loess Plateau ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
Southern Chinese

scholarly journals Reconstruction of 130-kyr Relative Geomagnetic Intensities from 10Be in Two Chinese Loess Sections

Radiocarbon ◽  
2010 ◽  
Vol 52 (1) ◽  
pp. 129-147 ◽  
Author(s):  
Weijian Zhou ◽  
Feng Xian ◽  
J Warren Beck ◽  
A J Timothy Jull ◽  
Zhisheng An ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Potential Application ◽  
Chinese Loess ◽  
Geomagnetic Excursion ◽  
The Past ◽  
Mis 3 ◽  
Good Agreement ◽  
Geomagnetic Intensity

Efforts to extract weak geomagnetic excursion signals from Chinese loess-paleosol 10Be have generally been unsuccessful due to the complexities of its accumulation, because the geomagnetic and climate (precipitation and dust) signals contained in loess-paleosol sequence are tightly overprinted. Here, we present a reconstruction of geomagnetic relative paleointensities for the past 130 kyr from 10Be records in 2 Chinese loess-paleosol sections using a correction based on the correlation of 10Be with magnetic susceptibility (SUS) to remove the climatic contamination. Both these records reveal the Laschamp and Blake events, which lie in the loess and paleosol (L1SS1 and S1SS3) horizons corresponding to mid-MIS 3 and 5e, respectively. The good agreement between our results and other geomagnetic intensities reconstructions from Atlantic and Pacific sediments indicates that our method is robust. Our study suggests the potential application of loess-paleosol 10Be for reconstructing geomagnetic intensity variations spanning the whole Quaternary.

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