The East Asian winter monsoon over the last 15,000 years: its links to high-latitudes and tropical climate systems and complex correlation to the summer monsoon

2012 ◽  
Vol 32 ◽  
pp. 131-142 ◽  
Author(s):  
Luo Wang ◽  
Jingjing Li ◽  
Houyuan Lu ◽  
Zhaoyan Gu ◽  
Patrick Rioual ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Tropical Climate ◽  
Winter Monsoon ◽  
High Latitudes ◽  
Asian Winter Monsoon ◽  
Complex Correlation ◽  
Climate Systems

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.

Relationship between East Asian winter monsoon and summer monsoon

2011 ◽  
Vol 28 (6) ◽  
pp. 1345-1356 ◽  
Author(s):  
Hongming Yan ◽  
Hui Yang ◽  
Yuan Yuan ◽  
Chongyin Li
Keyword(s):  
Summer Monsoon ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Asian Winter Monsoon

scholarly journals Roles of ENSO and PDO in the Link of the East Asian Winter Monsoon to the following Summer Monsoon

2013 ◽  
Vol 26 (2) ◽  
pp. 622-635 ◽  
Author(s):  
Wen Chen ◽  
Juan Feng ◽  
Renguang Wu
Keyword(s):  
Summer Monsoon ◽  
North Pacific ◽  
East Asian Winter Monsoon ◽  
Southern Oscillation ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Tropical Indian Ocean ◽  
Winter Monsoon ◽  
Asian Winter Monsoon ◽  
Monsoon Variability

Abstract The present study investigates the roles of El Niño–Southern Oscillation (ENSO) and the Pacific decadal oscillation (PDO) in the relationship between the East Asian winter monsoon (EAWM) and the following East Asian summer monsoon (EASM). The variability of the EAWM is divided into an ENSO-related part named EAWMEN and an ENSO-unrelated part named EAWMres. Corresponding to a weak EAWMEN, an anomalous low-level anticyclone forms over the western North Pacific (WNP) and persists from winter to the following summer. This anticyclone enhances southerlies over the coast of East Asia in summer. Hence, a weak EAWMEN tends to be followed by a strong EASM and vice versa. As such, a link is established between the EAWMEN and the EASM. The persistence of this WNP anticyclone may be mainly attributed to the sea surface temperature anomalies associated with the ENSO-related EAWM part in the tropical Indian Ocean and the extratropical North Pacific. In contrast, corresponding to a weak EAWMres, the anomalous WNP anticyclone is only seen in winter, and there is no obvious relationship between the EAWMres and the following EASM. Therefore, the observed EAWM–EASM relationship is dominated by the winter monsoon variability associated with ENSO. It is found that the EAWMEN–EASM relationship is modulated by the PDO. There tends to be a much stronger EASM after a weak EAWMEN during the positive PDO phases than during the negative PDO phases.

Variability of East Asian Winter Monsoon in Quaternary Climatic Extremes in North China

2000 ◽  
Vol 54 (3) ◽  
pp. 321-327 ◽  
Author(s):  
Huayu Lu ◽  
Ko van Huissteden ◽  
Jie Zhou ◽  
Jef Vandenberghe ◽  
Xiaodong Liu ◽  
...  
Keyword(s):  
Grain Size ◽  
Magnetic Susceptibility ◽  
Summer Monsoon ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Climatic Extremes ◽  
Asian Winter Monsoon ◽  
Monsoon Intensity ◽  
Monsoon Strength

In order to examine high-frequency variations of East Asian winter monsoon in Quaternary climatic extremes, two typical loess–paleosol sequences in the Chinese Loess Plateau were investigated. Sandy layers in the loess deposits, the “Upper sand” and “Lower sand” (layers L9 and L15, respectively), which represent a high-resolution record of paleomonsoon changes, have been sampled at intervals of 5–6 cm from sections at Luochuan and Xifeng. The grain size and magnetic susceptibility was measured for all samples. The grain-size results (a proxy of winter monsoon strength) indicate that the winter monsoon strength fluctuated on a millennial timescale during cold climatic extremes, with climatic events of a few hundred to a few thousand years. However, the winter monsoon was relatively stable during warm periods. The magnetic susceptibility signal (a proxy of summer monsoon intensity) is practically constant over the same period. This is tentatively explained by the assumption that the summer monsoon intensity was too low to be recorded in the magnetic susceptibility signal. The intensified winter monsoon events show periodicities in a range of 1000 to 2770 yr, with a dominant cycle of approximately 1450 yr. The detection of this oscillation in older glacial stages strongly suggests that it may be a pervasive cycle of the cold climatic phases of the Quaternary. Millennial-scale variations of the winter monsoon may be caused by instability of the westerly jet, which is determined by temperature differences between the polar and the equatorial regions.

scholarly journals Distinct responses of East Asian summer and winter monsoons to astronomical forcing

2011 ◽  
Vol 7 (4) ◽  
pp. 1363-1370 ◽  
Author(s):  
Z. G. Shi ◽  
X. D. Liu ◽  
Y. B. Sun ◽  
Z. S. An ◽  
Z. Liu ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
East Asian Winter Monsoon ◽  
Model Simulation ◽  
East Asian Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Chinese Loess Plateau ◽  
Asian Winter Monsoon ◽  
Asian Summer ◽  
Astronomical Forcing

Abstract. Influences of the Earth's astronomical forcing on the evolution of East Asian monsoon have been demonstrated with various geological records and climate models. Here, we present time series of climatic proxies from the Chinese Loess Plateau and Sanbao/Hulu caves and the winter/summer monsoon intensity index from a long-term transient climate model simulation. Both the observations and modelling results reveal consistently distinct responses of East Asian summer and winter monsoons to astronomical forcing. Different from the dominant local impact on the summer monsoon at the precession scale (~20 ka period), the East Asian winter monsoon is driven predominantly by the obliquity forcing (~40 ka period). We propose that the obliquity forcing controls the meridional insolation difference and, therefore, exerts a more significant effect on the evolution of the East Asian winter monsoon than previously expected.

scholarly journals Sedimentary Dynamics of the Central South Yellow Sea Revealing the Relation Between East Asian Summer and Winter Monsoon Over the Past 6000 years

2021 ◽  
Vol 9 ◽  
Author(s):  
Wenzhe Lyu ◽  
Tengfei Fu ◽  
Zhangxi Hu ◽  
Ying Zhong Tang ◽  
Guangquan Chen ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
East Asian Winter Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Asian Winter Monsoon ◽  
Asian Summer ◽  
Sedimentary Dynamics ◽  
The Relationship

The mud areas of East Asian marginal seas record considerable information about regional environmental evolution. However, debate continues regarding the relative importance of the major factors in regional sedimentary dynamics, i.e., the East Asian summer monsoon, East Asian winter monsoon, and oceanic circulation. In this study, we investigated the characteristics of grain size from a gravity core obtained in the South Yellow Sea to reveal changes in sedimentary dynamics since 6,000 years BP, and to elucidate the relationship between the East Asian summer monsoon and the East Asian winter monsoon. We found that the mean grain size was in the range of 6.9–7.8 Φ, the sediment was poorly sorted within a small range (1.2, 1.5), and the M values from 4.7 to 6.7 μm and most of the C values from 24 to 65 μm suggested pelagic suspension transport. Results indicated that the intensity of both the East Asian summer monsoon and the East Asian winter monsoon showed a fluctuating trend of decrease after approximately 6,000 years BP, and that the relationship between them was generally anticorrelated. Based on these results, we suggest that positive correlation between the East Asian summer monsoon and the East Asian winter monsoon usually results in the fall or establishment of ancient dynasties in the Central Plains of China and that negative correlation between them is controlled by strong solar radiation. Weakening of solar radiation diminishes its control of the intensity of (and thus the correlation between) the East Asian summer monsoon and the East Asian winter monsoon, at which time the North Atlantic Oscillation plays a modulating role.

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