Provenance and climate change inferred from Sr–Nd–Pb isotopes of late Quaternary sediments in the Huanghe (Yellow River) Delta, China

2012 ◽  
Vol 78 (3) ◽  
pp. 561-571 ◽  
Author(s):  
Bangqi Hu ◽  
Guogang Li ◽  
Jun Li ◽  
Jianqiang Bi ◽  
Jingtao Zhao ◽  
...  
Keyword(s):  
Climate Change ◽  
Loess Plateau ◽  
Yellow River ◽  
East Asian Monsoon ◽  
Late Quaternary ◽  
East Asian ◽  
Yellow River Delta ◽  
River Delta ◽  
Isotopic Compositions ◽  
The Impact

AbstractWe present a provenance study of core ZK2 from the Huanghe (Yellow River) Delta in order to assess the impacts of climate change on the sediment supplies during the last glacial–interglacial cycle. Facies analysis and sequence stratigraphy methods are used to construct the age model. Sr isotopic compositions of ZK2 range from 0.716389 to 0.723884, with 87Sr/86Sr increased with decreasing grain size. Nd and Pb isotopic compositions display two large major excursions during Marine Oxygen Isotope stages (MIS) 2 and 4, with less radiogenic εNd and lower 208Pb/204Pb, 207Pb/204Pb, and 206Pb/204Pb values during these periods. These excursions have been explained in terms of changes in the mixing proportion of sediments from the Loess Plateau and Ordos Plateau, resulting from East Asian monsoon intensity variations. The weak summer monsoon precipitation resulted in decreased erosion of Loess Plateau during MIS 2, 4 and the middle of MIS 3. Meanwhile, both the intensified East Asian winter monsoon and the southward expansions of Mu Us desert significantly enhanced the eolian sand entering the Huanghe. Therefore, our results highlight the impact of monsoon variability on erosion patterns in the Huanghe basin.

scholarly journals Study on Spatio-Temporal Change of Ecological Land in Yellow River Delta Based on RS&GIS

2018 ◽  
Vol 38 ◽  
pp. 01008 ◽  
Author(s):  
GuoQiang An
Keyword(s):  
Human Activities ◽  
Vegetation Index ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
Area Index ◽  
The Yellow River Delta ◽  
The Past ◽  
The Impact

The temporal and spatial variation of ecological land use and its current distribution were studied to provide reference for the protection of original ecological land and ecological environment in the Yellow River Delta. Using RS colour synthesis, supervised classification, unsupervised classification, vegetation index and other methods to monitor the impact of human activities on the original ecological land in the past 30 years; using GIS technology to analyse the statistical data and construct the model of original ecological land area index to study the ecological land distribution status. The results show that the boundary of original ecological land in the Yellow River Delta had been pushed toward the coastline at an average speed of 0.8km per year due to human activities. In the past 20 years, a large amount of original ecological land gradually transformed into artificial ecological land. In view of the evolution and status of ecological land in the Yellow River Delta, related local departments should adopt differentiated and focused protection measures to protect the ecological land of the Yellow River Delta.

scholarly journals Spatiotemporal Changes of Coastline over the Yellow River Delta in the Previous 40 Years with Optical and SAR Remote Sensing

2021 ◽  
Vol 13 (10) ◽  
pp. 1940
Author(s):  
Quantao Zhu ◽  
Peng Li ◽  
Zhenhong Li ◽  
Sixun Pu ◽  
Xiao Wu ◽  
...  
Keyword(s):  
Climate Change ◽  
Remote Sensing ◽  
Human Activities ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
Remote Sensing Images ◽  
The Yellow River Delta ◽  
Spatiotemporal Changes

The integration of multi-source, multi-temporal, multi-band optical, and radar remote sensing images to accurately detect, extract, and monitor the long-term dynamic change of coastline is critical for a better understanding of how the coastal environment responds to climate change and human activities. In this study, we present a combination method to produce the spatiotemporal changes of the coastline in the Yellow River Delta (YRD) in 1980–2020 with both optical and Synthetic Aperture Radar (SAR) satellite remote sensing images. According to the measurement results of GPS RTK, this method can obtain a high accuracy of shoreline extraction, with an observation error of 71.4% within one pixel of the image. Then, the influence of annual water discharge and sediment load on the changes of the coastline is investigated. The results show that there are two significant accretion areas in the Qing 8 and Qingshuigou course. The relative high correlation illustrates that the sediment discharge has a great contribution to the change of estuary area. Human activities, climate change, and sea level rise that affect waves and storm surges are also important drivers of coastal morphology to be investigated in the future, in addition to the sediment transport.

scholarly journals Effect of salinity on the cotton cultivation and introduction of Amaranthaceae halophytes in the Yellow River Delta, China.

2020 ◽  
Author(s):  
Hiroshi Takagi ◽  
Satoshi Yamada
Keyword(s):  
Yellow River ◽  
Spatial Differentiation ◽  
Yellow River Delta ◽  
Essential Elements ◽  
River Delta ◽  
Large Field ◽  
The Yellow River ◽  
Strong Negative Correlation ◽  
The Yellow River Delta ◽  
The Impact

Abstract Cotton is a main cash crop in the Yellow River Delta in China. Although cotton is known for its high salt tolerance, cotton yield is severely affected by excessive salt accumulation in soil. A large amount of the Yellow River water is introduced annually to leach surface salts; however, it has limited effects due to poor soil physical quality. In this study, we aimed to investigate the impact of soil salinity on cotton growth and the viability of Amaranthaceae halophytes as alternative crops. Cotton and Amaranthaceae plants, including Suaeda salsa, Kochia scoparia, swiss chard, table beets and spinach, were planted in a large field in the Yellow River Delta that had spatial differentiation in terms of soil electrical conductivity (EC). Our analysis on soil revealed that Na+ was the major cause of high EC; however, soil alkalization was not observed in highly salinized areas. Cotton biomass showed a strong negative correlation with soil EC. Although all tested Amaranthaceae plants also decreased biomass in high EC areas, this effect was clearly less pronounced in S. salsa and K. scoparia. To our surprise, levels of major (K+, Ca2+ and Mg2+) or minor (Fe2+, Mn2+, Zn2+ and Cu2+) essential elements were not significantly affected by soil EC in all plant species, suggesting that ion imbalance was not the main factor of growth reduction. All Amaranthaceae halophytes absorbed more Na+ but less Ca2+ than cotton, thus it would be possible that Amaranthaceae plants function better than cotton in terms of maintaining soil quality.

Late Quaternary strata and carbon burial records in the Yellow River delta, China

2015 ◽  
Vol 14 (3) ◽  
pp. 446-456 ◽  
Author(s):  
Guangming Zhao ◽  
Siyuan Ye ◽  
Guangxue Li ◽  
Xigui Ding ◽  
Hongming Yuan
Keyword(s):  
Yellow River ◽  
Late Quaternary ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
The Yellow River Delta ◽  
Carbon Burial

Historical change of carbon burial in Late Quaternary sediments of the ancient Yellow River delta on the west coast of Bohai Bay, China

CATENA ◽  
2020 ◽  
Vol 193 ◽  
pp. 104619
Author(s):  
Guangming Zhao ◽  
Siyuan Ye ◽  
Lei He ◽  
Hongming Yuan ◽  
Xigui Ding ◽  
...  
Keyword(s):  
West Coast ◽  
Yellow River ◽  
Late Quaternary ◽  
Yellow River Delta ◽  
River Delta ◽  
Historical Change ◽  
Bohai Bay ◽  
Quaternary Sediments ◽  
The West ◽  
Carbon Burial
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