scholarly journals Hydrogeochemical characteristics of groundwater and pore-water and the paleoenvironmental evolution in the past 3.10 Ma in the Xiong’an New Area, North China

China Geology ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 480-491
Author(s):  
Kai Zhao ◽  
◽  
Jing-xian Qi ◽  
Yi Chen ◽  
Bai-heng Ma ◽  
...  
Keyword(s):  
Pore Water ◽  
North China ◽  
The Past ◽  
Paleoenvironmental Evolution ◽  
Area North

Spatiotemporal pattern mining of drought in the last 40 years in China based on the SPEI index and space-time cube

2021 ◽  
Author(s):  
Dehe Xu ◽  
Qi Zhang ◽  
Yan Ding ◽  
De Zhang
Keyword(s):  
North China ◽  
Pattern Mining ◽  
Space Time ◽  
Central China ◽  
Spatiotemporal Pattern ◽  
Severe Drought ◽  
Monthly Precipitation ◽  
Hotspot Analysis ◽  
The Past ◽  
Significant Difference

AbstractDrought is a common natural disaster that greatly affects the crop yield and water supply in China. However, the spatiotemporal characteristics of drought in China are not well understood. This paper explores the spatial and temporal distributions of droughts in China over the past 40 years using multiscale standardized precipitation evapotranspiration index (SPEI) values calculated by monthly precipitation and temperature data from 612 meteorological stations in China from 1980 to 2019 and combines the space-time cube (STC), Mann-Kendall (M-K) test, emerging spatiotemporal hotspot analysis, spatiotemporal clustering and local outliers for the analysis. The results were as follows: 1) the drought frequency and STC show that there is a significant difference in the spatiotemporal distribution of drought in China, with the most severe drought in Northwest China, followed by the western part of Southwest China and the northern part of North China. 2) The emerging spatiotemporal hotspot analysis of SPEI6 over the past 40 years reveals two cold spots in subregion 4, indicating that future droughts in the region will be more severe. 3) A local outlier analysis of the multiscale SPEI yields a low-low outlier in western North China, indicating relatively more severe year-round drought in this area than in other areas. The low-high outlier in central China indicates that this region was not dry in the past and that drought will become more severe in this region in the future.

Sub-micron trace elemental distributions and U-Pb dating of zircon from the oldest rock in the Anshan area, North China Craton

2019 ◽  
Vol 322 ◽  
pp. 1-17 ◽  
Author(s):  
Yi-Jie Long ◽  
Wei Yang ◽  
Yang-Ting Lin ◽  
Jin-Hui Yang ◽  
Jia-Long Hao ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Trace Elemental ◽  
Area North

Ductile Extension and Uplift of Granulites in the Datong-Huaian Area, North China

2018 ◽  
pp. 173-184
Author(s):  
J.S. Zhang ◽  
P.H.G.M. Dirks ◽  
C.W. Passchier
Keyword(s):  
North China ◽  
Area North

scholarly journals Classification, grading criteria and quantitative expression of earth fissures: a case study in Daming Area, North China Plain

2018 ◽  
Vol 9 (1) ◽  
pp. 862-880 ◽  
Author(s):  
Jishan Xu ◽  
Jianbing Peng ◽  
Yahong Deng ◽  
Hongqian He ◽  
Lingchao Meng ◽  
...  
Keyword(s):  
North China Plain ◽  
North China ◽  
Quantitative Expression ◽  
Earth Fissures ◽  
Area North
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