Vegetation succession and East Asian Summer Monsoon Changes since the last deglaciation inferred from high-resolution pollen record in Gonghai Lake, Shanxi Province, China

The Holocene ◽  
2016 ◽  
Vol 27 (6) ◽  
pp. 835-846 ◽  
Author(s):  
Qinghai Xu ◽  
Fahu Chen ◽  
Shengrui Zhang ◽  
Xianyong Cao ◽  
Jianyong Li ◽  
...  
Keyword(s):  
High Resolution ◽  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Shanxi Province ◽  
Pollen Record ◽  
Last Deglaciation ◽  
Asian Summer ◽  
The Last Deglaciation

scholarly journals East Asian summer monsoon precipitation variability since the last deglaciation

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Fahu Chen ◽  
Qinghai Xu ◽  
Jianhui Chen ◽  
H. John B. Birks ◽  
Jianbao Liu ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Precipitation Variability ◽  
Last Deglaciation ◽  
Monsoon Precipitation ◽  
Asian Summer ◽  
The Last Deglaciation

Orbital- and suborbital-scale changes in the East Asian summer monsoon since the last deglaciation

The Holocene ◽  
2018 ◽  
Vol 28 (8) ◽  
pp. 1216-1224 ◽  
Author(s):  
Junfeng Li ◽  
Xingqi Liu
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Northern China ◽  
Meridional Overturning Circulation ◽  
Last Deglaciation ◽  
Climatic Fluctuations ◽  
Asian Summer ◽  
The Last Deglaciation

The variability of the East Asian summer monsoon (EASM) has far-reaching effects on the global climate system and the environment, and full understanding of the variability and dynamics of the EASM contributes to predictions of its future behavior. Here, we present a well-dated mineralogical and total organic carbon record from a saline inland lake in northern China which provides a robust archive of the EASM evolution since 16.0 cal. ka BP. Our record reveals a series of rapid and frequent millennial-scale climatic fluctuations during the last deglaciation; these fluctuations are documented by changes in the abundances of mirabilite, bloedite, and gypsum, which appear to record the Oldest Dryas, the Bølling-Allerød warm period, and the Younger Dryas. The peak EASM moisture occurred in the early and middle Holocene, which was punctuated by a prominent and abrupt weak monsoon interval that occurred synchronously with the 8.2 cal. ka BP cold event. This moisture maximum was terminated at 6.9–5.9 cal. ka BP by a warm-dry event marked by the deposition of gaylussite. Subsequently, the EASM gradually weakened over the late Holocene. The EASM moisture patterns reconstructed from Anguli-nuur Lake display good consistency with records from northern China, as revealed by a regional comparison; moreover, the recorded changes are synchronous with those of the Indian summer monsoon moisture patterns, as revealed by a comparison with the stalagmite records of southern China. Our reconstruction shows that the EASM has responded broadly to Northern Hemisphere summer insolation forcing on orbital time scales since the last deglaciation; thus, insolation is the primary factor that controls regional hydrological variations in the Asian monsoonal domain. The suborbital-scale events are related to the Atlantic meridional overturning circulation, and a slowdown of this circulation would lead to a southward shift of the intertropical convergence zone and a weakening of the EASM.

scholarly journals Rapid Northwestward Extension of the East Asian Summer Monsoon Since the Last Deglaciation: Evidence From the Mollusk Record

2021 ◽  
Vol 9 ◽  
Author(s):  
Yajie Dong ◽  
Naiqin Wu ◽  
Fengjiang Li ◽  
Houyuan Lu
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Spatiotemporal Pattern ◽  
Delayed Response ◽  
Climatic Warming ◽  
Last Deglaciation ◽  
Zonal Distribution ◽  
Asian Summer

The magnitude and rate of the expansion of the East Asian summer monsoon (EASM) rain belt under future climatic warming are unclear. Appropriate ecological proxy data may provide an improved understanding of the spatial extension of the EASM during past warming intervals. We reconstructed the spatiotemporal pattern of the extension of the EASM since the Last Glacial Maximum (LGM), using six well-dated mollusk fossil sequences from Chinese loess sections located on the modern northern edge of the EASM. The abundance of typical dominant mollusk species indicative of EASM intensity shows a delayed response, from ∼17 ka in the southeastern sections to ∼9 ka in the northwestern sections, during the last deglacial warming. Isoline plots based on a mollusk data synthesis show that the mollusk EASM indicators have a northeast–southwest zonal distribution for both the present-day, the cold LGM, and the warm mid-Holocene, which is consistent with the spatial pattern of modern precipitation. The resulting estimated expansion rate of EASM intensity accelerated during ∼12–9 ka (∼50 km/ka), which corresponds to the early Holocene interval of rapid climatic warming, a northwestward shift of ∼150 km compared to today. This implies that the northern fringe of the EASM in northern China will become wetter in the coming century, under moderate warming scenarios.

Sign in / Sign up

Export Citation Format

Share Document