Eolian grain-size signature of the Sikouzi lacustrine sediments (Chinese Loess Plateau): Implications for Neogene evolution of the East Asian winter monsoon

2009 ◽  
Vol 122 (5-6) ◽  
pp. 843-854 ◽  
Author(s):  
H. Jiang ◽  
Z. Ding
Keyword(s):  
Grain Size ◽  
Loess Plateau ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Lacustrine Sediments ◽  
Winter Monsoon ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
Asian Winter Monsoon

East Asian winter monsoon evolution since the late Pliocene based on a pollen record from Lake Xingkai, northeast Asia

2019 ◽  
Vol 93 ◽  
pp. 40-59 ◽  
Author(s):  
Shouzhen Xin ◽  
Ji Shen ◽  
Wenfang Zhang ◽  
Weiwei Sun ◽  
Xiayun Xiao
Keyword(s):  
High Resolution ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Northeast Asia ◽  
Winter Monsoon ◽  
Chinese Loess Plateau ◽  
Pollen Record ◽  
Chinese Loess ◽  
Asian Winter Monsoon ◽  
Climatic Cooling

AbstractA 328.58 m drill core (XK12) was recovered from lacustrine–alluvial sediments in the Xingkai Basin, northeast China, with the aim of obtaining a high-resolution pollen record of East Asian winter monsoon (EAWM) evolution since 3.6 Ma. An index based on the pollen record of thermophilous trees and terrestrial herbs is used as an indicator of winter temperature conditions controlled by the EAWM, at the glacial–interglacial scale. Primary age control was established based on lithostratigraphy and magnetostratigraphy, and then the pollen index was correlated to the LR04 global benthic δ18O record and finally tuned to Earth orbital obliquity to produce a high-resolution astronomical time scale. The pollen record indicates that the EAWM underwent two stepwise enhancements at 2.8 and 1.6 Ma. These events are consistent with paleoclimatic records of mean quartz grain size from the Chinese Loess Plateau, and they are also in accord with the initiation and intensification of Northern Hemisphere glaciation. Our findings suggest that the variability of the EAWM since 3.6 Ma was primarily controlled by changes in global ice volume and climatic cooling.

East Asian winter monsoon variation during the last 3000 years as recorded in a subtropical mountain lake, northeastern Taiwan

The Holocene ◽  
2021 ◽  
pp. 095968362110190
Author(s):  
Tsai-Wen Lin ◽  
Stefanie Kaboth-Bahr ◽  
Kweku Afrifa Yamoah ◽  
André Bahr ◽  
George Burr ◽  
...  
Keyword(s):  
Grain Size ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Mountain Lake ◽  
Sediment Grain Size ◽  
Global Monsoon ◽  
Asian Winter Monsoon ◽  
The Past ◽  
Monsoon System

The East Asian Winter Monsoon (EAWM) is a fundamental part of the global monsoon system that affects nearly one-quarter of the world’s population. Robust paleoclimate reconstructions in East Asia are complicated by multiple sources of precipitation. These sources, such as the EAWM and typhoons, need to be disentangled in order to understand the dominant source of precipitation influencing the past and current climate. Taiwan, situated within the subtropical East Asian monsoon system, provides a unique opportunity to study monsoon and typhoon variability through time. Here we combine sediment trap data with down-core records from Cueifong Lake in northeastern Taiwan to reconstruct monsoonal rainfall fluctuations over the past 3000 years. The monthly collected grain-size data indicate that a decrease in sediment grain size reflects the strength of the EAWM. End member modelling analysis (EMMA) on sediment core and trap data reveals two dominant grain-size end-members (EMs), with the coarse EM 2 representing a robust indicator of EAWM strength. The downcore variations of EM 2 show a gradual decrease over the past 3000 years indicating a gradual strengthening of the EAWM, in agreement with other published EAWM records. This enhanced late-Holocene EAWM can be linked to the expansion of sea-ice cover in the western Arctic Ocean caused by decreased summer insolation.

Grain size records reveal variability of the East Asian Winter Monsoon since the Middle Holocene in the Central Yellow Sea mud area, China

2012 ◽  
Vol 55 (10) ◽  
pp. 1656-1668 ◽  
Author(s):  
BangQi Hu ◽  
ZuoSheng Yang ◽  
MeiXun Zhao ◽  
Yoshiki Saito ◽  
DeJiang Fan ◽  
...  
Keyword(s):  
Grain Size ◽  
Yellow Sea ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Middle Holocene ◽  
Asian Winter Monsoon ◽  
Sea Mud ◽  
Mud Area

Out-of-phase evolution between summer and winter East Asian monsoons during the Holocene as recorded by Chinese loess deposits

2014 ◽  
Vol 81 (3) ◽  
pp. 500-507 ◽  
Author(s):  
Dunsheng Xia ◽  
Jia Jia ◽  
Guanhua Li ◽  
Shuang Zhao ◽  
Haitao Wei ◽  
...  
Keyword(s):  
Loess Plateau ◽  
East Asian Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Chinese Loess Plateau ◽  
Magnetic Minerals ◽  
The Holocene ◽  
Chinese Loess ◽  
Southern Chinese ◽  
Monsoon Strength

AbstractWe analyzed climate proxies from loessic-soil sections of the southern Chinese Loess Plateau. The early Holocene paleosol, S0, is 3.2 m thick and contains six sub-soil units. Co-eval soils from the central Loess Plateau are thinner (~ 1 m). Consequently higher-resolution stratigraphic analyses can be made on our new sections and provide more insight into Holocene temporal variation of the East Asian monsoon. Both summer and winter monsoon evolution signals are recorded in the same sections, enabling the study of phase relationships between the signals. Our analyses consist of (i) measurements of magnetic properties sensitive to the production of fine-grained magnetic minerals which reflect precipitation intensity and summer monsoon strength; and (ii) grain-size analyses which reflect winter monsoon strength. Our results indicate that the Holocene precipitation maximum occurred in the mid-Holocene, ~ 7.8–3.5 cal ka BP, with an arid interval at 6.3–5.3 cal ka BP. The winter monsoon intensity declined to a minimum during 5.0–3.4 cal ka BP. These results suggest that the East Asian summer and winter monsoons were out of phase during the Holocene, possibly due to their different sensitivities to ice and snow coverage at high latitudes and to sea-surface temperature at low latitudes.

scholarly journals Early Holocene weakening and mid- to late Holocene strengthening of the East Asian winter monsoon

Geology ◽  
2020 ◽  
Vol 48 (11) ◽  
pp. 1043-1047 ◽  
Author(s):  
Shugang Kang ◽  
Jinhua Du ◽  
Ning Wang ◽  
Jibao Dong ◽  
Duo Wang ◽  
...  
Keyword(s):  
Northern Hemisphere ◽  
High Latitude ◽  
Late Holocene ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Early Holocene ◽  
Luminescence Dating ◽  
Chinese Loess ◽  
Asian Winter Monsoon

Abstract Sub-orbital-scale variations of the East Asian winter monsoon (EAWM) and its mechanisms during the Holocene are controversial, partly due to the lack of high-quality records from Chinese loess. Here, we present high-resolution reconstruction of Holocene EAWM intensity based on optically stimulated luminescence dating and grain-size analysis from three loess sections taken from the Chinese Loess Plateau. The EAWM showed a persistent weakening trend during the early Holocene (ca. 11.7–6.5 kyr B.P.) and a strengthening trend during the mid- to late Holocene (since ca. 6.5 kyr B.P.). We propose that this was caused by changes in high-latitude Northern Hemisphere ice volume and middle- to high-latitude Northern Hemisphere atmospheric temperatures, respectively. We also observed an anti-correlation between EAWM and East Asian summer monsoon. Our findings provide a robust solution to the debate regarding Holocene EAWM changes and contribute to the understanding of potential future variations in EAWM intensity.

Zr/Rb ratio in the Chinese loess sequences and its implication for changes in the East Asian winter monsoon strength

2006 ◽  
Vol 70 (6) ◽  
pp. 1471-1482 ◽  
Author(s):  
Jun Chen ◽  
Yang Chen ◽  
Lianwen Liu ◽  
Junfeng Ji ◽  
William Balsam ◽  
...  
Keyword(s):  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Chinese Loess ◽  
Asian Winter Monsoon ◽  
Monsoon Strength

Eolian Quartz Flux to Lake Biwa, Central Japan, over the Past 145,000 Years

1997 ◽  
Vol 48 (1) ◽  
pp. 48-57 ◽  
Author(s):  
Jule Xiao ◽  
Yoshio Inouchi ◽  
Hisao Kumai ◽  
Shusaku Yoshikawa ◽  
Yoichi Kondo ◽  
...  
Keyword(s):  
Lake Biwa ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Central Japan ◽  
Chinese Loess ◽  
Asian Winter Monsoon ◽  
The Past ◽  
Source Regions ◽  
Quartz Flux

Eolian quartz flux (EQF, g cm−2(103 yr)−1) to Lake Biwa, central Japan, provides direct information on variations of the East Asian winter monsoon. Lake Biwa sediments spanning the past ca. 145,000 yr are characterized by two main periods when EQF values were significantly greater than 5.50 g cm−2(103 yr)−1, and two main intervals during which EQF values were lower. Two periods with EQF values >5.50 g cm−2(103 yr)−1occurred from ca. 145,000 to 125,000 and 73,000 to 13,000 yr B.P., while times of lower EQF values occurred from ca. 125,000 to 73,000 yr B.P. and around ca. 5500 yr B.P. Between ca. 125,000 and 73,000 yr B.P., three minimum EQF values and two intervening peaks of slightly higher EQF values are recorded. EQF increased markedly from ca. 73,000 to 13,000 yr B.P., whereas between ca. 53,000 and 20,000 yr B.P. the values recorded were relatively lower than those recorded during either the preceding or the subsequent episodes. The data imply that the East Asian winter monsoon strengthened during the periods when EQF values were high, and weakened during the intervals with low EQF values. The EQF record of Lake Biwa can be correlated with the grain-size record of the quartz fraction in Chinese loess and with the SPECMAP marine δ18O record. However, the EQF record apparently lags ca. 5000 yr behind the loess and δ18O records during stage 6/5 and 2/1 transitions and ca. 10,000 yr during stage 5/4 transition. These apparent lags could be due to problems with the chronology; alternatively, they may imply that the eolian quartz flux depended more on the extent of dust source regions than on wind intensity during these transitions.

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