scholarly journals HIGHSTAND SEA-LEVEL IN THE HOLOCENE INFERRED FROM BURIED PEAT AND DIATOM ASSEMBLAGES FROM NORTH COAST OF THE YELLOW SEA, CHINA

2019 ◽  
Vol 17 (6) ◽  
Author(s):  
J FANG
Keyword(s):  
Sea Level ◽  
Yellow Sea ◽  
The Yellow Sea ◽  
North Coast ◽  
Diatom Assemblages ◽  
The Holocene

Strata sequence and paleochannel response to tectonic, sea-level, and Asian monsoon variability since the late Pleistocene in the South Yellow Sea

2019 ◽  
Vol 92 (2) ◽  
pp. 450-468 ◽  
Author(s):  
Liyan Wang ◽  
Guangxue Li ◽  
Jishang Xu ◽  
Yong Liu ◽  
Lulu Qiao ◽  
...  
Keyword(s):  
Sea Level ◽  
Late Pleistocene ◽  
Yellow Sea ◽  
Yellow River ◽  
Seismic Profile ◽  
Sediment Supply ◽  
The Yellow Sea ◽  
South Yellow Sea ◽  
Sea Level Changes ◽  
Quaternary Period

AbstractThe continental shelf strata provide information regarding sea-level fluctuation and climate changes in the Quaternary period. A 5831.47-km-long high-resolution seismic profile and borehole core (YS01) were acquired to reconstruct the evolutionary history of the strata in South Yellow Sea (SYS) during the late Pleistocene. The strata recorded three transgression events (HI, HII, and HIII) and three stages of paleochannel development (LI, LII, and LIII). Based on the distribution, thickness, and volume of the strata formed in the three transgressions, we concluded that the scale of the three transgressions during the late Pleistocene was HIII, HI, and HII, in descending order. In addition, our data show that the Yellow River extended to the Yellow Sea Trough during the last glacial maximum. The influence of the tectonic framework on sedimentation in the SYS was completely concealed by sea-level changes and sediment supply in the late Pleistocene (~Marine Isotope Stage 5). Since then, the accommodation space, a crucial prerequisite for sedimentation, has been controlled solely by sea-level changes in the SYS. Furthermore, two “source to sink” models of the neritic shelf in the marine and terrestrial environments were established, including high sea-level and shelf-exposure models.

Crustal subsidence inferred from reconstruction of the Pleistocene–Holocene palaeogeography in the northern Lake Inba area, central Japan

2019 ◽  
Vol 94 ◽  
pp. 61-79
Author(s):  
Takashi Chiba ◽  
Shigeo Sugihara ◽  
Yoshiaki Matsushima ◽  
Yusuke Arai ◽  
Kunihiko Endo
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Environmental Changes ◽  
Sea Level Changes ◽  
Diatom Assemblages ◽  
Central Japan ◽  
Lower Salinity ◽  
The Holocene ◽  
Holocene Transgression

ABSTRACTTo help characterise the palaeogeographic and lacustrine environmental changes that resulted from the Holocene transgression and residual subsidence in the eastern Kanto Plain of central Japan, we analysed four drill cores and reviewed other core data from the southern part of the Lake Inba area. Fossil diatom assemblages yielded evidence of centennial-scale palaeogeographic and salinity responses to sea-level changes since the late Pleistocene. We determined that the seawater incursion into the Lake Inba area during the Holocene transgression occurred at approximately 9000 yr. We also recognised a late Holocene regression event corresponding to the Yayoi regression, considered to have occurred from ca. 3000 to ca. 2000 yr, and a subsequent transgression. Our data clarify some of the palaeogeographic changes that occurred in the Lake Inba area and document an overall trend toward lower salinity in the lake during the regression. In particular, the environment in Lake Inba changed from brackish to freshwater no later than 1000 yr. From the detailed palaeogeographic and palaeo-sea-level reconstruction, we recognised that residual subsidence occurred during the Holocene in this area. Thus, comparison of sea-level reconstructions based on modelling and fossil diatom assemblages is effective in interpreting Holocene long-term subsidence.

scholarly journals Phylogeographic and population insights of the Asian common toad (Bufo gargarizans) in Korea and China: population isolation and expansions as response to the ice ages

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e4044 ◽  
Author(s):  
Amaël Borzée ◽  
Joana L. Santos ◽  
Santiago Sánchez-RamÍrez ◽  
Yoonhyuk Bae ◽  
Kyongman Heo ◽  
...  
Keyword(s):  
Sea Level ◽  
Yellow Sea ◽  
Korean Peninsula ◽  
East Asian ◽  
Population Expansion ◽  
The Yellow Sea ◽  
Ice Ages ◽  
Common Toad ◽  
North East ◽  
Bufo Gargarizans

The effects of ice ages on speciation have been well documented for many European and North American taxa. In contrast, very few studies have addressed the consequences of such environmental and topographical changes in North East Asian species. More precisely, the Korean Peninsula offers a unique model to assess patterns and processes of speciation as it hosts the northern- and eastern-most distribution limit of some widespread Asian taxa. Despite this, studies addressing phylogeographic patterns and population genetics in the peninsula and surrounding countries are few and studies for most families are lacking. Here we inferred the phylogenetic relationships of the common toad (Bufo gargarizans) from South Korea and their North East Asian counterpart populations, based on mitochondrial data. KoreanB. gargarizansGenBank BLASTs matched few individuals from nearby China, but the presence of a Korean clade suggests isolation on the Korean Peninsula, previous to the last glacial maximum, linked to sea level resurgence. Molecular clock calibrations within this group were used to date the divergence between clades and their relationship to paleo-climatic events in the area. Lack of genetic structure among South Korean populations and strong homogeneity between the Korean and some Chinese localities suggest weak isolation and recent expansion. Geographical projection of continuous coalescent maximum-clade-credibility trees shows an original Chinese expansion towards the Korean Peninsula through the Yellow Sea circa two million years ago with colonisation events dating circa 800 thousand years ago (K. y. a.). Following this colonisation, the data point to outgoing Korean Peninsula dispersal events throughout different periods, towards the North through land, and West through land bridge formations over the Yellow Sea during sea level falls. In accordance, demographic analyses revealed a population expansion in the Koran Peninsula circa 300 K. y. a., likely attributed to glacial cycle fluctuations.

Biomarker evidence for changes in terrestrial organic matter input into the Yellow Sea mud area during the Holocene

2016 ◽  
Vol 59 (6) ◽  
pp. 1216-1224 ◽  
Author(s):  
Peng Wu ◽  
XiaoTong Xiao ◽  
ShuQin Tao ◽  
ZuoSheng Yang ◽  
HaiLong Zhang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Yellow Sea ◽  
The Yellow Sea ◽  
Terrestrial Organic Matter ◽  
The Holocene ◽  
Sea Mud ◽  
Mud Area ◽  
Organic Matter Input

Sedimentary evolution of the Holocene subaqueous clinoform off the Shandong Peninsula in the Yellow Sea

2007 ◽  
Vol 236 (3-4) ◽  
pp. 165-187 ◽  
Author(s):  
Jian Liu ◽  
Yoshiki Saito ◽  
Hong Wang ◽  
Zigeng Yang ◽  
Rei Nakashima
Keyword(s):  
Yellow Sea ◽  
The Yellow Sea ◽  
Shandong Peninsula ◽  
The Holocene ◽  
Sedimentary Evolution

Tidal Responses to Future Sea Level Trends on the Yellow Sea Shelf

2019 ◽  
Vol 124 (11) ◽  
pp. 7285-7306 ◽  
Author(s):  
Xi Feng ◽  
Hui Feng ◽  
Huichao Li ◽  
Fan Zhang ◽  
Weibing Feng ◽  
...  
Keyword(s):  
Sea Level ◽  
Yellow Sea ◽  
The Yellow Sea

scholarly journals Pressure-forced meteotsunami occurrences in the eastern Yellow Sea over the past decade (2010–2019): monitoring guidelines

2021 ◽  
Author(s):  
Myung‑Seok Kim ◽  
Seung‑Buhm Woo ◽  
Hyunmin Eom ◽  
Sung Hyup You
Keyword(s):  
Sea Level ◽  
Monitoring System ◽  
Yellow Sea ◽  
Tide Gauge ◽  
The Yellow Sea ◽  
Occurrence Rate ◽  
Risk Level ◽  
Observation System ◽  
Pressure Disturbance ◽  
The Past

Abstract. The eastern Yellow Sea meteotsunami occurrences between 2010 and 2019 and guidelines derived using favourable conditions of pressure disturbance (10 min rate of air pressure change) for meteotsunami generation are described. A total of 34 meteotsunami events over the past decade can be classified based on a current meteotsunami monitoring and observation system. 1 min intervals of mean sea level pressure and sea level observations from 89 meteorological stations and 16 tide gauges are analysed. Most of the classified meteotsunami events (76 %, 26/34) in the eastern Yellow Sea are found to be between February and June during the winter-to-summer transition, which shows a strong seasonal trend. The meteotsunami occurrences are spatially frequent at the DaeHeuksando (DH) tide gauge, known as a beacon tide gauge of the observation system. It appears that the specific characteristics (intensity, occurrence rate, and propagation) of the pressure disturbance are in common on extreme meteotsunami events that are classified by applying the hazardous meteotsunami conditions among the 34 events. For a risk level assessment of the eastern Yellow Sea meteotsunami occurrences, favourable conditions of the pressure disturbance for meteotsunami generation are utilized. Overall, this study can provide useful and practical guidelines such as operation period, potential hot spot, and risk level to monitoring system operators when operating the monitoring system of the Yellow Sea.

scholarly journals A paleoenvironmental reconstruction of the last 15 000 cal yr BP via Yellow Sea sediments using biomarkers and isotopic composition of organic matter

2014 ◽  
Vol 10 (2) ◽  
pp. 1527-1565 ◽  
Author(s):  
A. O. Badejo ◽  
B.-H. Choi ◽  
H.-G. Cho ◽  
H.-I. Yi ◽  
K.-H. Shin
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Yellow Sea ◽  
Climatic Conditions ◽  
Plant Distribution ◽  
The Yellow Sea ◽  
Paleoenvironmental Reconstruction ◽  
Glacial Period ◽  
The Holocene ◽  
Glacial Periods

Abstract. This study is the first reconstruction of the paleoenvironment and paleovegetation during the Holocene (interglacial) and glacial periods of the Yellow Sea. We report the carbon isotopic and biomarker (n-alkane and alkenone) compositions of organic matter from Yellow Sea sediments since the glacial period. Our findings show that the variability of the East Asian Monsoon (EAM) affected the sedimentary profile of total organic carbon (TOC), the stable isotopes of bulk organic carbon (δ13Corg), the atomic ratio of carbon and nitrogen (C/N ratio), and biomarker content. The sedimentary δ13Corg profile along the core exhibited more negative δ13Corg values under cold/dry climatic conditions (Younger and Oldest Dryas). The carbon preference index (CPI), the pristane to phytane ratio (Pr/Ph) and the pristane to n-C17 ratio (Pr/n-C17) were used to determine the early stages of diagenesis along the sediment core. Two climatic conditions were distinguished (warm/humid and cold/dry) based on an n-alkane proxy, and the observed changes in δ13C of individual n-alkane (δ13CALK) between the Holocene and glacial periods were attributed to changes in plant distribution/type. Clear differences were not found in the calculated alkenone sea surface temperature (SST) between those of the Holocene and glacial periods. This anomaly during the glacial period might be attributed to the seasonal water mass distribution in the Yellow Sea or a seasonal shift in the timing of maximum alkenone production as well as the Bølling/Allerød interstadial.

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