scholarly journals Shear Wave Speed of Shallow Seafloor Sediments in the Northern South China Sea and Their Correlations With Physical Parameters

2020 ◽  
Vol 7 (3) ◽  
Author(s):  
Guangming Kan ◽  
Guolin Cao ◽  
Jingqiang Wang ◽  
Guanbao Li ◽  
Baohua Liu ◽  
...  
Keyword(s):  
South China Sea ◽  
Shear Wave ◽  
South China ◽  
Wave Speed ◽  
Northern South China Sea ◽  
Physical Parameters ◽  
Shear Wave Speed ◽  
China Sea ◽  
Seafloor Sediments

scholarly journals Asian Winter Monsoon Imprint on the Water Column Structure at the Northern South China Sea Coast

2021 ◽  
Vol 9 ◽  
Author(s):  
Yancheng Zhang ◽  
Kai Zhu ◽  
Chao Huang ◽  
Deming Kong ◽  
Yuxin He ◽  
...  
Keyword(s):  
South China Sea ◽  
Water Column ◽  
South China ◽  
Northern South China Sea ◽  
Critical Factor ◽  
Ice Age ◽  
Physical Parameters ◽  
Monsoon Circulation ◽  
China Sea ◽  
Effective Manner

Coastal regions of the northern South China Sea (SCS) strongly interact with the Asian monsoon circulation (AMC). Thus, variations of sea surface temperature (SST) here are newly suggested to document AMC changes in an effective manner, but additional physical parameters of oceanic conditions, probably also in relation to the AMC system, remain poorly understood. In this study, we analyzed glycerol dialkyl glycerol tetraethers (GDGTs) from a well-dated sediment core YJ, retrieved at the northern SCS coast, to further scrutinize the intrinsic response of water column to winter AMC strength. It shows that within the time frame of past ∼1,000 years, the tetraether index of lipids with 86 carbon atoms (TEX86) and published alkenone (U37K′) temperature records together confirm a reduced thermal gradient during the Little Ice Age (LIA), in comparison to that during the Medieval Climate Anomaly (MCA). Considering concurrent variations of the branched and isoprenoid tetraether (BIT) and the ratio of archaeol to caldarchaeol (ACE), for example, with decreased values (<∼0.3) for the former and relatively high values for the latter at the LIA, indicative of stratification and salinity changes, respectively, these multiple lines of evidence thereby call for well mixing of onsite water at site YJ correspondingly. Our results suggest that winter AMC strength is a critical factor for mixing subsurface waters and modifying thermal/saline conditions at the northern SCS coasts through the last millennium and also, perhaps, on longer timescales.

GEOPHYSICAL RESPONSE OF THE LIUHUA CARBONATE PLATFORM IN NORTHERN SOUTH CHINA SEA

2011 ◽  
Vol 31 (4) ◽  
pp. 105-112
Author(s):  
Guangxu ZHANG ◽  
Shiguo WU ◽  
Weilin ZHU ◽  
Hesheng SHI ◽  
Duanxin CHEN
Keyword(s):  
South China Sea ◽  
South China ◽  
Carbonate Platform ◽  
Northern South China Sea ◽  
China Sea
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