scholarly journals Analysis on the PM2.5 Concentration During Heating and Cooking in Cold Rural Areas of Northern China

2016 ◽  
Author(s):  
Xueyan Zhang ◽  
Bin Chen
Keyword(s):  
Rural Areas ◽  
Northern China ◽  
Pm2.5 Concentration

scholarly journals Exploring the Change in PM2.5 and Ozone Concentrations Caused by Aerosol–Radiation Interactions and Aerosol–Cloud Interactions and the Relationship with Meteorological Factors

Atmosphere ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1585
Author(s):  
Xin Zhang ◽  
Chengduo Yuan ◽  
Zibo Zhuang
Keyword(s):  
Ozone Concentration ◽  
Coupled Model ◽  
Correlation Coefficients ◽  
Northern China ◽  
Hygroscopic Growth ◽  
Oxidation Rates ◽  
Aerosol Cloud ◽  
Ozone Concentrations ◽  
Aerosol Cloud Interactions ◽  
Pm2.5 Concentration

Aerosols can interact with other meteorological variables in the air via aerosol–radiation or aerosol–cloud interactions (ARIs/ACIs), thus affecting the concentrations of particle pollutants and ozone. The online-coupled model WRF-Chem was applied to simulate the changes in the PM2.5 (particulate matter less than 2.5 μm in aerodynamic diameter) and ozone concentrations that are caused by these mechanisms in China by conducting three parallel sensitivity tests. In each case, availabilities of aerosol–radiation interactions and aerosol–cloud interactions were set differently in order to distinguish each pathway. Partial correlation coefficients were also analyzed using statistical tools. As suggested by the results, the ARIs reduced ground air temperature, wind speed, and planetary boundary height while increasing relative humidity in most places. Consequently, the ozone concentration in the corresponding region declined by 4%, with a rise in the local annual mean PM2.5 concentration by approximately 12 μm/m3. The positive feedback of the PM2.5 concentration via ACIs was also found in some city clusters across China, despite the overall enhancement value via ACIs being merely around a quarter to half that via ARIs. The change in ozone concentration via ACIs exhibited different trends. The ozone concentration level increased via ACIs, which can be attributed to the drier air in the south and the diminished solar radiation that is received in central and northern China. The correlation coefficient suggests that the suppression in the planetary boundary layer is the most significant factor for the increase in PM2.5 followed by the rise in moisture required for hygroscopic growth. Ozone showed a significant correlation with NO2, while oxidation rates and radiation variance were also shown to be vitally important.

scholarly journals Seasonal variations in aerosol optical properties over China

2008 ◽  
Vol 8 (3) ◽  
pp. 8431-8453 ◽  
Author(s):  
Y. Wang ◽  
J. Xin ◽  
Z. Li ◽  
S. Wang ◽  
P. Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Seasonal Variations ◽  
Rural Areas ◽  
Meteorological Data ◽  
Agricultural Practices ◽  
Hainan Island ◽  
Northern China ◽  
The Tibetan Plateau ◽  
Northern Forest ◽  
Aerosol Emissions

Abstract. The seasonal variations in background aerosol optical depth (AOD) and aerosol type are investigated over various ecosystems in China based upon three years' worth of meteorological data and data collected by the Chinese Sun Hazemeter Network. In most parts of China, AODs are at a maximum in spring or summer and at a minimum in autumn or winter. Minimum values (0.10~0.20) of annual mean AOD at 500 nm are found in the Qinghai-Tibetan Plateau, which is located in the remote northeast corner of China, the northern forest ecosystems and Hainan Island. Annual mean AOD ranges from 0.25 to 0.30 over desert and oasis areas as well as the desertification grasslands in northern China; the annual mean AOD over the Loess Plateau is moderately high at 0.36. Regions where the highest density of agricultural and industrial activities are located and where anthropogenic sulphate aerosol and soil aerosol emissions are consistently high throughout the whole year (e.g. the central-eastern, southern and eastern coastal regions of China) experience annual mean AODs ranging from 0.50~0.80. Remarkable seasonal changes in the main types of aerosol over northern China (characterized by the Angstrom exponent, α) are seen. Due to biomass and fossil fuel burning from extensive agricultural practices in northern rural areas, concentrations of smoke and soot aerosols rise dramatically during autumn and winter (high α), while the main types of aerosol during spring and summer are dust and soil aerosols (low α). Over southeast Asia, biomass burning during the spring leads to increases in smoke and soot emissions. Over the Tibetan Plateau and Hainan Island where the atmosphere is pristine, the main types of aerosol are dust and sea salt, respectively.

Coal-to-gas heating compensation standard and willingness to make clean energy choices in typical rural areas of northern China

Energy Policy ◽  
2020 ◽  
Vol 145 ◽  
pp. 111698
Author(s):  
Yutong Yan ◽  
Wenxian Jiao ◽  
Kang Wang ◽  
Yatao Huang ◽  
Jingyang Chen ◽  
...  
Keyword(s):  
Rural Areas ◽  
Clean Energy ◽  
Northern China ◽  
Gas Heating ◽  
Compensation Standard

scholarly journals The Associations between Outdoor Playtime, Screen-Viewing Time, and Environmental Factors in Chinese Young Children: The “Eat, Be Active and Sleep Well” Study

2020 ◽  
Vol 17 (13) ◽  
pp. 4867 ◽  
Author(s):  
Qiang Wang ◽  
Jiameng Ma ◽  
Akira Maehashi ◽  
Hyunshik Kim
Keyword(s):  
Preschool Children ◽  
Environmental Factors ◽  
Rural Areas ◽  
Northern China ◽  
Cross Sectional Study ◽  
Outdoor Play ◽  
Viewing Time ◽  
Sectional Study ◽  
Cross Sectional ◽  
Screen Viewing

The purpose of this study is to identify regional differences in outdoor activity time and screen-viewing time of preschool children in urban and rural areas and to provide data on the environmental factors to identify modifiable determinants for each region. This cross-sectional study was conducted on 1772 out of 2790 children between the age of 3 to 6 years living in northern China, with their consent. A cross-sectional study was conducted among preschool children living in urban (n = 1114) and rural areas (n = 658) in northern China. To assess environmental factors, the International Physical Activity Questionnaire was used for neighborhood environments, and the questionnaire included three items each for the physical home environment and socio-cultural environment domains. We observed the associations between outdoor play for urban children and sidewalks in the neighborhood, paths for cycles, aesthetic qualities, and “motor vehicles. In addition, in rural areas, screen-viewing time and environmental factors were found to be positively correlated with traffic, limited place and method of outdoor play, and were negatively correlated with the importance of academics and need for company in outdoor play. This has important implications for the development of effective intervention programs for preschool children in China in the future.

scholarly journals Contribution of Satellite-Derived Aerosol Optical Depth PM2.5 Bayesian Concentration Surfaces to Respiratory-Cardiovascular Chronic Disease Hospitalizations in Baltimore, Maryland

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 209
Author(s):  
John T. Braggio ◽  
Eric S. Hall ◽  
Stephanie A. Weber ◽  
Amy K. Huff
Keyword(s):  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Rural Areas ◽  
Conditional Logistic Regression ◽  
Fine Particulate Matter ◽  
Warm Season ◽  
Ambient Air ◽  
Cold Season ◽  
Model Predictions ◽  
Pm2.5 Concentration

The fine particulate matter baseline (PMB), which includes PM2.5 monitor readings fused with Community Multiscale Air Quality (CMAQ) model predictions, using the Hierarchical Bayesian Model (HBM), is less accurate in rural areas without monitors. To address this issue, an upgraded HBM was used to form four experimental aerosol optical depth (AOD)-PM2.5 concentration surfaces. A case-crossover design and conditional logistic regression evaluated the contribution of the AOD-PM2.5 surfaces and PMB to four respiratory-cardiovascular hospital events in all 99 12 km2 CMAQ grids, and in grids with and without ambient air monitors. For all four health outcomes, only two AOD-PM2.5 surfaces, one not kriged (PMC) and the other kriged (PMCK), had significantly higher Odds Ratios (ORs) on lag days 0, 1, and 01 than PMB in all grids, and in grids without monitors. In grids with monitors, emergency department (ED) asthma PMCK on lag days 0, 1 and 01 and inpatient (IP) heart failure (HF) PMCK ORs on lag days 01 were significantly higher than PMB ORs. Warm season ORs were significantly higher than cold season ORs. Independent confirmation of these results should include AOD-PM2.5 concentration surfaces with greater temporal-spatial resolution, now easily available from geostationary satellites, such as GOES-16 and GOES-17.

scholarly journals Difference in PM2.5 Variations between Urban and Rural Areas over Eastern China from 2001 to 2015

Atmosphere ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 312 ◽  
Author(s):  
Changqing Lin ◽  
Alexis Lau ◽  
Ying Li ◽  
Jimmy Fung ◽  
Chengcai Li ◽  
...  
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Eastern China ◽  
Population Exposure ◽  
Spatial Difference ◽  
The Past ◽  
The Difference ◽  
Urban And Rural Areas ◽  
Pm2.5 Concentration

To more effectively reduce population exposure to PM2.5, control efforts should target densely populated urban areas. In this study, we took advantage of satellite-derived PM2.5 data to assess the difference in PM2.5 variations between urban and rural areas over eastern China during the past three Five-Year Plan (FYP) periods (2001–2015). The results show that urban areas experienced less of a decline in PM2.5 concentration than rural areas did in more than half of the provinces during the 11th FYP period (2006–2010). In contrast, most provinces experienced a greater reduction of PM2.5 concentration in urban areas than in rural areas during the 10th and 12th FYP periods (2001–2005 and 2011–2015, respectively). During the recent 12th FYP period, the rates of decline in PM2.5 concentration in urban areas were more substantial than in rural areas by as much as 1.5 μg·m−3·year−1 in Beijing and 2.0 μg·m−3·year−1 in Tianjin. These results suggest that the spatial difference in PM2.5 change was conducive to a reduction in the population exposure to PM2.5 in most provinces during recent years.

scholarly journals Epidemiological Analysis of 1234 Cases of Laryngeal Cancer in Shanxi Province, China

2021 ◽  
Vol 28 ◽  
pp. 107327482110412
Author(s):  
Hui Qi ◽  
Wenjie Chen ◽  
Chunming Zhang ◽  
Xiwang Zheng ◽  
Chen Peng ◽  
...  
Keyword(s):  
Incidence Rate ◽  
Laryngeal Cancer ◽  
Rural Areas ◽  
Urban Areas ◽  
Northern China ◽  
Shanxi Province ◽  
World Population ◽  
Drinking Status ◽  
Epidemiological Characteristics ◽  
The City

Background Laryngeal cancer is a common malignancy of the head and neck, especially in northern China, including Shanxi province. This study intends to describe the epidemiological characteristics of laryngeal cancer in Shanxi Province, China, in order to support prevention and treatment efforts. Methods Retrospective analysis of the medical records of patients diagnosed with laryngeal cancer in hospitals in Shanxi Province from 2008 to 2012. Results The average annual incidence rate of laryngeal cancer in Shanxi province from 2008 to 2012 was 0.70/105, the Chinese population standardized incidence rate was 0.57/105 and the world population standardized incidence rate was 0.60/105. The city with the highest incidence of laryngeal cancer in Shanxi Province is Taiyuan, followed by Yangquan, and the lowest incidence are Yuncheng and Jincheng. The cases included 723 farmers (58.6%), 338 workers (27.4%), 95 government cadres (7.7%), 35 unemployed individuals (2.8%), 30 teachers (2.4%) and 13 individuals with other occupations (1.1%). The incidence of laryngeal cancer in rural areas was 0.78/105, while urban areas was 0.60/105. Of 1006 patients with smoking and drinking status reported, there were 238 both smoking and drinking (23.7%), 491 only smoking but not drinking (48.8%), 4 only drinking but not smoking (0.4%), 273 both not smoking and not drinking (27.1%) (P<0.001), and there were 695 males smoking (95.3%), 34 females smoking (4.7%) (P<0.001). Of 879 patients for whom the primary cancer location was known, 406 cases (46.2%) were supraglottic and 428 cases (48.7%) were glottic. Among 1009 patients with known pathological classification, the vast majority had squamous cell carcinoma (992 cases, 98.3%). Conclusions To sum up, the incidence of laryngeal cancer in Shanxi Province exhibited a relatively stable trend from 2008 to 2012, and the incidence is higher in men than in women in all years. The high percentage of smokers in this study underscores the importance of smoking as a risk factor for laryngeal cancer, whereas rates of drinking did not appear to be linked. Incidence of laryngeal cancer was higher in rural areas than in urban areas, a pattern that differs from other regions of China and internationally.

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