scholarly journals Temporal and spatial variations of net anthropogenic nitrogen inputs (NANI) in the Pearl River Basin of China from 1986 to 2015

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0228683
Author(s):  
Xia Cui ◽  
Caizhu Huang ◽  
Jiapeng Wu ◽  
Xiaohan Liu ◽  
Yiguo Hong
Keyword(s):  
River Basin ◽  
Spatial Variations ◽  
Pearl River ◽  
Pearl River Basin ◽  
Temporal And Spatial Variations ◽  
Nitrogen Inputs ◽  
Anthropogenic Nitrogen ◽  
Temporal And Spatial ◽  
The Pearl River ◽  
The Pearl River Basin

scholarly journals Temporal and Spatial Variations of Precipitationδ18O and Controlling Factors on the Pearl River Basin and Adjacent Regions

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Yunfeng Ruan ◽  
Zhaofei Liu ◽  
Zhijun Yao ◽  
Rui Wang
Keyword(s):  
Water Vapor ◽  
River Basin ◽  
Spatial Variations ◽  
Water Vapor Transport ◽  
Pearl River ◽  
Pearl River Basin ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial ◽  
The Pearl River ◽  
The Pearl River Basin

Based on the precipitation  δ18O values from the datasets of the Global Network of Isotopes in Precipitation (GNIP), the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) Reanalysis data, and previous researches, we explored the temporal and spatial variations of precipitation  δ18O in a typical monsoon climate zone, the Pearl River basin (PRB), and adjacent regions. The results showed that the temporal variations of precipitation  δ18O for stations should be correlated with water vapor sources, the distance of water vapor transport, the changes in location, and intensity of the intertropical convergence zone (ITCZ) rather than “amount effect.” Meanwhile, local meteorological and geographical factors showed close correlations with mean weighted precipitation  δ18O values, suggesting that “altitude effect” and local meteorological conditions were significant for the spatial variations of precipitation  δ18O. Moreover, we established linear regression models for estimating the mean weighted precipitation  δ18O values, which could better estimate variations in precipitation  δ18O than the Bowen and Wilkinson model in the PRB and adjacent regions.

Spatial–temporal changes of precipitation structure across the Pearl River basin, China

2012 ◽  
Vol 440-441 ◽  
pp. 113-122 ◽  
Author(s):  
Qiang Zhang ◽  
Vijay P. Singh ◽  
Juntai Peng ◽  
Yongqin David Chen ◽  
Jianfeng Li
Keyword(s):  
River Basin ◽  
Temporal Changes ◽  
Pearl River ◽  
Pearl River Basin ◽  
Precipitation Structure ◽  
The Pearl River ◽  
The Pearl River Basin

scholarly journals Teleconnection analysis of runoff and soil moisture over the Pearl River basin in southern China

2014 ◽  
Vol 18 (4) ◽  
pp. 1475-1492 ◽  
Author(s):  
J. Niu ◽  
J. Chen ◽  
B. Sivakumar
Keyword(s):  
Time Series ◽  
Soil Moisture ◽  
River Basin ◽  
Southern China ◽  
Hydrological Processes ◽  
Pearl River ◽  
Pearl River Basin ◽  
Rank Correlation Method ◽  
The Pearl River ◽  
The Pearl River Basin

Abstract. This study explores the teleconnection of two climatic patterns, namely the El Niño–Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD), with hydrological processes over the Pearl River basin in southern China, particularly on a sub-basin-scale basis. The Variable Infiltration Capacity (VIC) model is used to simulate the daily hydrological processes over the basin for the study period 1952–2000, and then, using the simulation results, the time series of the monthly runoff and soil moisture anomalies for its ten sub-basins are aggregated. Wavelet analysis is performed to explore the variability properties of these time series at 49 timescales ranging from 2 months to 9 yr. Use of the wavelet coherence and rank correlation method reveals that the dominant variabilities of the time series of runoff and soil moisture are basically correlated with IOD. The influences of ENSO on the terrestrial hydrological processes are mainly found in the eastern sub-basins. The teleconnections between climatic patterns and hydrological variability also serve as a reference for inferences on the occurrence of extreme hydrological events (e.g., floods and droughts).

scholarly journals Effects of atmospheric CO2 consumption on rock weathering in the Pearl River basin, China

2019 ◽  
Vol 98 ◽  
pp. 06011
Author(s):  
Xiaoqun Qin ◽  
Zhongcheng Jiang ◽  
Liankai Zhang ◽  
Qibo Huang ◽  
Pengyu Liu
Keyword(s):  
River Basin ◽  
Carbonate Rock ◽  
Isotopic Analysis ◽  
Climatic Conditions ◽  
Pearl River ◽  
Rock Weathering ◽  
Pearl River Basin ◽  
Average Value ◽  
The Pearl River ◽  
The Pearl River Basin

Atmospheric CO2 is absorbed and dissolved in water via karst processes not only in carbonate rock areas, but in all rock areas of the earth. The chemical and isotopic analysis results, particularly of strontium, for water samples collected from eleven stations along the Pearl River, four times over the course of one year, showed that due to weathering by carbonate or silicate rocks, HCO3-, Ca2+, and Mg2+ have become the main ions in the river water. Through river ion stoichiometric and flux calculations, the carbonate rock weathering rate and atmospheric CO2 consumption were found to be 27.6 mm/ka and 540 x 103 mol/km2.a, which are 10.8 and 6.7 times the corresponding values for silicate rock. With the beneficial climatic conditions for rock erosion and large areas of carbonate rock in the Pearl River Basin, the atmospheric CO2 consumption value is about 2.6 times the average value for the 60 major rivers in the world.

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