scholarly journals Characteristics of the Sea-Breeze Circulation in the Pearl River Delta Region and Its Dynamical Diagnosis

2019 ◽  
Vol 58 (4) ◽  
pp. 741-755 ◽  
Author(s):  
Cheng You ◽  
Jimmy Chi-Hung Fung
Keyword(s):  
Pearl River Delta ◽  
Sea Breeze ◽  
River Delta ◽  
Pearl River ◽  
Pearl River Delta Region ◽  
Background Wind ◽  
Breeze Circulation ◽  
Start Time ◽  
The Pearl River Delta ◽  
The Pearl River

AbstractThe Pearl River delta (PRD) region has experienced rapid economic development since the 1980s and has become one of the world’s largest industrial zones and metropolitan areas. Previous studies have shown that the sea-breeze circulation can contribute to pollutant transportation and convective initiation, so it is useful to study the dynamic structure of the sea-breeze circulation in the PRD region. Many researchers have focused on the effects of environmental factors, such as topography, urbanization, and background wind, on the sea breeze, but most focused only on case studies and did not quantify the characteristics of the sea-breeze circulation climatologically. In this study, a sea-breeze identification metric was defined to identify sea-breeze events from WRF simulation data of 2012 and quantify their characteristics, including their start time, end time, strength, height, frequency, pumping ability, and inland-penetrating distance. The results indicate that this method works well to identify and quantify the sea-breeze events of 2012. It is found that the solenoid term, the largest positive contributor to vorticity acceleration, is mostly modulated by the temperature gradient. Therefore, the frontogenesis of the sea-breeze front is discussed in this study. The result shows that offshore background wind that increases frontogenesis is favorable to the development of the sea breeze, but it also prevents it from propagating vertically and horizontally.

scholarly journals Effects of urbanization on the land sea breeze circulation over the Pearl River Delta region in winter

2009 ◽  
Vol 30 (7) ◽  
pp. 1089-1104 ◽  
Author(s):  
Xi Lu ◽  
Kim-Chiu Chow ◽  
Teng Yao ◽  
Alexis K. H. Lau ◽  
Jimmy C. H. Fung
Keyword(s):  
Pearl River Delta ◽  
Sea Breeze ◽  
River Delta ◽  
Pearl River ◽  
Pearl River Delta Region ◽  
Breeze Circulation ◽  
Delta Region ◽  
The Pearl River Delta ◽  
The Pearl River

scholarly journals Response of the Sea Breeze to Urbanization in the Pearl River Delta Region

2019 ◽  
Vol 58 (7) ◽  
pp. 1449-1463 ◽  
Author(s):  
Cheng You ◽  
Jimmy Chi-Hung Fung ◽  
Wai Po Tse
Keyword(s):  
Pearl River Delta ◽  
Coastal Region ◽  
Sea Breeze ◽  
River Delta ◽  
Pearl River ◽  
Pearl River Delta Region ◽  
Start Time ◽  
Rapid Urbanization ◽  
The Pearl River Delta ◽  
The Pearl River

AbstractThe Pearl River delta (PRD) region has undergone rapid urbanization since the 1980s, which has had significant effects on the sea-breeze circulation in this region. Because the sea breeze plays an important role in pollutant transportation and convective initiation in the PRD region, it is meaningful to study the effects of urbanization on the sea breeze. In this study, three numerical experiments were conducted from 2 June to 31 August 2010 with land-use data from 1988, 1999, and 2010. For each simulation, characteristics of the sea breeze such as the start time, end time, intensity, height, pumping ability, and inland penetration distance were quantified. By comparing the characteristics of the sea breeze in these simulations, its response to urbanization was quantified. The results show that urbanization enhances the duration, height, and intensity of the sea breeze but blocks its inland penetration. One physical mechanism is proposed to dynamically elucidate the response of the sea breeze to urbanization. Because the urban area in the PRD region is concentrated near the coast, urbanization imposes a positive heating gradient on the coastal region and a negative heating gradient on the region farther inland. The positive heating gradient may intensify the sea breeze, and the negative heating gradient may prevent the sea breeze from propagating farther inland.

Hydrogeochemistry and geothermometry of geothermal waters from the Pearl River Delta region, South China

Geothermics ◽  
2021 ◽  
Vol 96 ◽  
pp. 102164
Author(s):  
Zheng-An Wei ◽  
Haibing Shao ◽  
Ling Tang ◽  
Bin Deng ◽  
Hailong Li ◽  
...  
Keyword(s):  
South China ◽  
Pearl River Delta ◽  
River Delta ◽  
Pearl River ◽  
Pearl River Delta Region ◽  
Delta Region ◽  
Geothermal Waters ◽  
The Pearl River Delta ◽  
The Pearl River

Assessing the impacts of seasonal and vertical atmospheric conditions on air quality over the Pearl River Delta region

2018 ◽  
Vol 180 ◽  
pp. 69-78 ◽  
Author(s):  
Cheuk Hei Marcus Tong ◽  
Steve Hung Lam Yim ◽  
Daniel Rothenberg ◽  
Chien Wang ◽  
Chuan-Yao Lin ◽  
...  
Keyword(s):  
Air Quality ◽  
Pearl River Delta ◽  
River Delta ◽  
Pearl River ◽  
Atmospheric Conditions ◽  
Pearl River Delta Region ◽  
Delta Region ◽  
The Pearl River Delta ◽  
The Pearl River

scholarly journals Adverse birth outcomes in Guangdong province, China, 2014–2017: a spatiotemporal analysis of 2.9 million births

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e030629
Author(s):  
Huazhang Miao ◽  
Bing Li ◽  
Wu Li ◽  
Fei Yao ◽  
Yuliang Chen ◽  
...  
Keyword(s):  
Birth Outcomes ◽  
Pearl River Delta ◽  
Guangdong Province ◽  
River Delta ◽  
Pearl River ◽  
Adverse Birth Outcomes ◽  
Pearl River Delta Region ◽  
Live Births ◽  
The Pearl River Delta ◽  
The Pearl River

ObjectivesAdverse birth outcomes pose a great threat to the public health and bring a heavy burden of disease in China. A comprehensive examination of the temporal and spatial trends of preterm birth (PTB), low birth weight (LBW) and small for gestational age (SGA) epidemics can provide some elementary information for subsequent aetiological and epidemiological studies. This study aimed to characterise the spatiotemporal features of PTB, LBW and SGA based on a large cohort of live births in China.DesignSpatiotemporal descriptive analysis was performed in Guangdong province, China, from 2014 to 2017.SettingData involving 2 917 098 live births in Guangdong province, China from 2014 to 2017 was collected from Guangdong Birth Certificate System. Information was collected, including the date of birth, gestational age in week, birth weight, sex of the infant, age of the mother and registered residence of the mother.ResultsThe estimated rate of PTB, LBW and SGA was 4.16%, 4.14% and 12.86%, respectively. For temporal trends, the rates of PTB, LBW and SGA showed seasonal fluctuations, especially for LBW and SGA. In addition, there were regional differences in the rates of PTB, LBW and SGA between the Pearl River Delta and Non-Pearl River Delta regions. From 2014 to 2017, the high rates of PTB and LBW expanded from the Pearl River Delta region to the Non-Pearl River Delta regions. However, compared with the Pearl River Delta region, the rate of SGA was higher in the Non-Pearl River Delta regions on the whole.ConclusionThe findings of this study contribute to the understanding of the aetiology and epidemiology of PTB, LBW and SGA in south China.

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