The grain-size depositional process in wetlands of the Sanjiang Plain and its links with the East Asian monsoon variations during the Holocene

2014 ◽  
Vol 349 ◽  
pp. 245-251 ◽  
Author(s):  
Zhenqing Zhang ◽  
Wei Xing ◽  
Xianguo Lv ◽  
Guoping Wang
Keyword(s):  
Grain Size ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Sanjiang Plain ◽  
The Sanjiang Plain ◽  
The Holocene ◽  
Depositional Process

scholarly journals The peatlands developing history in the Sanjiang Plain, NE China and its response to East Asian monsoon variation

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Zhenqing Zhang ◽  
Wei Xing ◽  
Guoping Wang ◽  
Shouzheng Tong ◽  
Xianguo Lv ◽  
...  
Keyword(s):  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Sanjiang Plain ◽  
Ne China ◽  
The Sanjiang Plain

scholarly journals Changes in Paleovegetation and Paleoclimate in China Since the Late Middle Pleistocene: A Case Study of the Dajiuhu Basin

2021 ◽  
Vol 13 (9) ◽  
pp. 4848
Author(s):  
Liwei Wu ◽  
Xinling Li ◽  
Qinghai Xu ◽  
Manyue Li ◽  
Qiufeng Zheng ◽  
...  
Keyword(s):  
Grain Size ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Central China ◽  
Middle Pleistocene ◽  
Pollen Record ◽  
The Difference ◽  
Late Middle Pleistocene

The East Asian monsoon system is an important part of global atmospheric circulation; however, records of the East Asian monsoon from different regions exhibit different evolutionary rhythms. Here, we show a high-resolution record of grain size and pollen data from a lacustrine sediment core of Dajiuhu Lake in Shennongjia, Hubei Province, China, in order to reconstruct the paleovegetation and paleoeclimate evolution of the Dajiuhu Basin since the late Middle Pleistocene (~237.9 ka to the present). The results show that grain size and pollen record of the core DJH-2 are consistent with the δ18O record of stalagmites from Sanbao Cave in the same area, which is closely related to the changes of insolation at the precessional (~20-kyr) scale in the Northern Hemisphere. This is different from the records of the Asian summer monsoon recorded in the Loess Plateau of North China, which exhibited dominant 100-kyr change cyclicities. We suggest that the difference between paleoclimatic records from North and South China is closely related to the east–west-oriented mountain ranges of the Qinling Mountains in central China that blocked weakened East Asia summer monsoons across the mountains during glacial periods.

scholarly journals Supplemental Material: Monthly insolation linked to the time-transgressive nature of the Holocene East Asian monsoon precipitation maximum

2021 ◽  
Author(s):  
Xin Zhou ◽  
et al.
Keyword(s):  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Monsoon Precipitation ◽  
The Holocene ◽  
Precipitation Changes

Supplemental information on the records used, the chronological framework of different sites, reconstructions of precipitation changes, and the defined time of the Holocene monsoon precipitation maximum.<br>

Multiple analysis of variation of the East Asian Monsoon during the Holocene

2010 ◽  
Vol 213 (1-2) ◽  
pp. 74-78 ◽  
Author(s):  
Huiyu Liu ◽  
Zhenshan Lin ◽  
Xiangzhen Qi ◽  
Mingyang Zhang ◽  
Zhenzhen Zhang ◽  
...  
Keyword(s):  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
The Holocene ◽  
Analysis Of Variation ◽  
Multiple Analysis

Holocene climate variations from Zhuyeze terminal lake records in East Asian monsoon margin in arid northern China

2010 ◽  
Vol 74 (1) ◽  
pp. 46-56 ◽  
Author(s):  
Hao Long ◽  
ZhongPing Lai ◽  
NaiAng Wang ◽  
Yu Li
Keyword(s):  
Late Holocene ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Northern China ◽  
Optically Stimulated Luminescence ◽  
Early Holocene ◽  
Climate Variations ◽  
The Holocene ◽  
Geomorphic Features

AbstractZhuyeze palaeolake is a terminal lake situated in the arid northern China in the East Asian monsoon margin. In order to examine the Holocene palaeoclimatic change in the East Asian monsoon margin, Qingtu Lake section (QTL) from Zhuyeze palaeolake is sampled in high resolution. Palaeoclimatic proxies such as grain size, carbonate, TOC, C/N and δ13C of organic matter, were analyzed; eleven 14C samples and six optically stimulated luminescence (OSL) samples were dated to provide chronological control. We also investigated the geomorphic features of lake shorelines in this area. The results show that the climate was warm and dry in early-Holocene (9.5–7.0 cal ka BP), cool and humid in mid-Holocene (7.0–4.8 cal ka BP), and increasingly drier in late-Holocene (since 4.8 cal ka BP). Comparisons of our records with other records in adjacent areas, as well as with the records in the Asian monsoon areas, suggested that changes in effective moisture was synchronous in East Asian monsoon marginal zone (i.e. the pattern of dry early-Holocene, humid mid-Holocene, and aridity-increasing late-Holocene), and that the moisture optimum during the Holocene was out-of-phase between Asian monsoon margin and Asian monsoonal dominated region, possibly due to the high temperature at that time.

Reconstruction of climate and vegetation changes of Lake Bayanchagan (Inner Mongolia): Holocene variability of the East Asian monsoon

2006 ◽  
Vol 65 (3) ◽  
pp. 411-420 ◽  
Author(s):  
Wenying Jiang ◽  
Zhengtang Guo ◽  
Xiangjun Sun ◽  
Haibin Wu ◽  
Guoqiang Chu ◽  
...  
Keyword(s):  
Inner Mongolia ◽  
Climate Changes ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Forest Patches ◽  
The Holocene ◽  
Temperature And Precipitation ◽  
Northern Latitudes ◽  
Vegetation And Climate

AbstractA high-resolution pollen and Pediastrum record, spanning 12,500 yr, is presented for Lake Bayanchagan , southern Inner Mongolia. Individual pollen taxa (PT-MAT) and the PFT affinity scores (PFT-MAT) were used for quantitative climatic reconstruction from pollen and algal data. Both techniques indicate that a cold and dry climate, similar to that of today, prevailed before 10,500 cal yr B.P. The wettest climate occurred between ∼10,500 and 6500 cal yr B.P., at which time annual precipitation was up to 30–60% higher than today. The early Holocene increases in temperature and precipitation occurred simultaneously, but mid-Holocene cooling started at approximately 8000 cal yr B.P., 1500 yr earlier than the drying. Vegetation reconstruction was based on the objective assignment of pollen taxa to the plant functional type. The results suggest that this region was dominated by steppe vegetation throughout the Holocene, except for the period ∼9200 to ∼6700 cal yr B.P., when forest patches were relatively common. Inner Mongolia is situated at the limit of the present East Asian monsoon and patterns of vegetation and climate changes in that region during the Holocene probably reflect fluctuations in the monsoon's response to solar insolation variations. The early to middle Holocene monsoon undoubtedly extended to more northern latitudes than at present.

scholarly journals The evolution of sub-monsoon systems in the Afro-Asian monsoon region during the Holocene – comparison of different transient climate model simulations

2014 ◽  
Vol 10 (3) ◽  
pp. 2293-2353 ◽  
Author(s):  
A. Dallmeyer ◽  
M. Claussen ◽  
N. Fischer ◽  
K. Haberkorn ◽  
S. Wagner ◽  
...  
Keyword(s):  
Asian Monsoon ◽  
Climate Model ◽  
East Asian Monsoon ◽  
East Asian ◽  
Precipitation Trend ◽  
Monsoon Region ◽  
North African ◽  
Asian Monsoon Region ◽  
The Holocene ◽  
Climate Model Simulations

Abstract. The recently proposed global monsoon hypothesis interprets monsoon systems as part of one global-scale atmospheric overturning circulation, implying a connection between the regional monsoon systems and an in-phase behaviour of all northern hemispheric monsoons on annual timescales (Trenberth et al., 2000). Whether this concept can be applied to past climates and variability on longer timescales is still under debate, because the monsoon systems exhibit different regional characteristics such as different seasonality (i.e. onset, peak, and withdrawal). To investigate the interconnection of different monsoon systems during the pre-industrial Holocene, five transient global climate model simulations have been analysed with respect to the rainfall trend and variability in different sub-domains of the Afro-Asian monsoon region. Our analysis suggests that on millennial timescales with varying orbital forcing, the monsoons do not behave as a tightly connected global system. According to the models, the Indian and North African monsoons are coupled, showing similar rainfall trend and moderate correlation in rainfall variability in all models. The East Asian monsoon changes independently during the Holocene. The dissimilarities in the seasonality of the monsoon sub-systems lead to a stronger response of the North African and Indian monsoon systems to the Holocene insolation forcing than of the East Asian monsoon and affect the seasonal distribution of Holocene rainfall variations. Within the Indian and North African monsoon domain, precipitation solely changes during the summer months, showing a decreasing Holocene precipitation trend. In the East Asian monsoon region, the precipitation signal is determined by an increasing precipitation trend during spring and a decreasing precipitation change during summer, partly balancing each other. A synthesis of reconstructions and the model results do not reveal an impact of the different seasonality on the timing of the Holocene rainfall optimum in the different sub-monsoon systems. They rather indicate locally inhomogeneous rainfall changes and show, that single palaeo-records should not be used to characterise the rainfall change and monsoon evolution for entire monsoon sub-systems.

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