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.

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

2020 ◽  
Author(s):  
Shugang Kang ◽  
et al.
Keyword(s):  
Late Holocene ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Original Data ◽  
Winter Monsoon ◽  
Osl Dating ◽  
Early Holocene ◽  
Asian Winter Monsoon

Details of sampling, quartz OSL dating, Bayesian age-depth model, proxy measurements and implications, normalization and stacking, and original data for Figure 2.<br>

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

2020 ◽  
Author(s):  
Shugang Kang ◽  
et al.
Keyword(s):  
Late Holocene ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Original Data ◽  
Winter Monsoon ◽  
Osl Dating ◽  
Early Holocene ◽  
Asian Winter Monsoon

Details of sampling, quartz OSL dating, Bayesian age-depth model, proxy measurements and implications, normalization and stacking, and original data for Figure 2.<br>

scholarly journals The East Asian winter monsoon variability in response to precession and inter-hemispheric heat balance

2013 ◽  
Vol 9 (4) ◽  
pp. 4229-4261
Author(s):  
M. Yamamoto ◽  
H. Sai ◽  
M.-T. Chen ◽  
M. Zhao
Keyword(s):  
Northern Hemisphere ◽  
Summer Monsoon ◽  
Heat Balance ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Asian Winter Monsoon ◽  
Ice Volume ◽  
Monsoon Variability ◽  
Winter Insolation

Abstract. The response of Asian monsoon variability to orbital forcing is still unclear, and all hypotheses are controversial. We present a record of the sea surface temperature difference (ΔSST) between the South China Sea and the other Western Pacific Warm Pool regions as a proxy for the intensity of the Asian winter monsoon, because the winter cooling of the South China Sea is caused by the cooling of surface water at the northern margin and the southward advection of cooled water due to winter monsoon winds. The ΔSST showed significant precession cycles during the last 150 kyr. In the precession cycle, the maximum winter monsoon intensity shown by the ΔSST corresponded to the May perihelion and was delayed behind the maximum ice volume. The East Asian winter monsoon was anti-phase with the Indian summer monsoon and the summer monsoon precipitation in central Japan. The timing of the maximum phase of the East Asian winter monsoon was different from previous results in terms of the March perihelion (ice volume maxima) and June perihelion (minimum of Northern Hemisphere winter insolation). We infer that the variation of the East Asian winter monsoon was caused by a physical mechanism of inter-hemispheric heat balance. The East Asian winter monsoon was intensified by the Northern Hemisphere cooling, which was caused by the combined effect of cooling by the ice volume forcing and the decrease in winter insolation, or by decreased heat transfer from the Southern Hemisphere to the Northern Hemisphere owing to the weak Indian summer monsoon at the May perihelion.

scholarly journals Distinguishing Interannual Variations of the Northern and Southern Modes of the East Asian Winter Monsoon

2014 ◽  
Vol 27 (2) ◽  
pp. 835-851 ◽  
Author(s):  
Zhang Chen ◽  
Renguang Wu ◽  
Wen Chen
Keyword(s):  
Surface Temperature ◽  
North Atlantic ◽  
High Latitude ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Interannual Variations ◽  
Asian Winter Monsoon ◽  
The North ◽  
The North Atlantic

Abstract The East Asian winter monsoon (EAWM)-related climate anomalies have shown large year-to-year variations in both the intensity and the meridional extent. The present study distinguishes the interannual variations of the low-latitude and mid- to high-latitude components of the EAWM to gain a better understanding of the characteristics and factors for the EAWM variability. Through composite analysis based on two indices representing the northern and southern components (modes) of the EAWM variability, the present study clearly reveals features unique to the northern and southern mode. The northern mode is associated with changes in the mid- to high-latitude circulation systems, including the Siberian high, the Aleutian low, the East Asian trough, and the East Asian westerly jet stream, whereas the southern mode is closely related to circulation changes over the global tropics, the North Atlantic, and North America. A strong northern mode is accompanied by positive, negative, and positive surface temperature anomalies in the Indochina Peninsula, midlatitude Asia, and northeast Russia, respectively. A strong southern mode features lower temperature over tropics and higher temperature over mid- to high-latitude Asia. While the southern mode is closely related to El Niño–Southern Oscillation (ENSO), the northern mode does not show an obvious relation to the tropical sea surface temperature (SST) change or to the North Atlantic Oscillation (NAO)/Arctic Oscillation (AO) on the interannual time scale. Distinct snow cover and sea ice changes appear as responses to wind and surface temperature changes associated with the two modes and their effects on the EAWM variability need to be investigated in the future.

Late Holocene aeolian sedimentation in the Tottori coastal dune field, Japan Sea, affected by the East Asian winter monsoon

2016 ◽  
Vol 397 ◽  
pp. 147-158 ◽  
Author(s):  
Toru Tamura ◽  
Yoshinori Kodama ◽  
Mark D. Bateman ◽  
Yu Saitoh ◽  
Naofumi Yamaguchi ◽  
...  
Keyword(s):  
Late Holocene ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Japan Sea ◽  
Winter Monsoon ◽  
Coastal Dune ◽  
Dune Field ◽  
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.

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