Monthly Variations of Atmospheric Circulations Associated with Haze Pollution in the Yangtze River Delta and North China

In recent years, haze frequently occurs in the Yangtze river delta region. In order to explore the influencing factors of haze pollution, the paper uses panel data from 2006 to 2016 and spatial lag model to explore the influencing factors of PM2.5. The results show that there is an inverted u-shaped relationship between haze pollution and economic development. The increase of the tertiary industry and the progress of science and technology can improve haze pollution, while the increase of foreign direct investment and the continuous expansion of population will exert pressure on the environment. Finally, according to the research results of this paper, the corresponding policies are proposed..

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Estimating the Effects of Economic Agglomeration on Haze Pollution in Yangtze River Delta China Using an Econometric Analysis

Sustainability ◽

10.3390/su11071893 ◽

2019 ◽

Vol 11 (7) ◽

pp. 1893 ◽

Cited By ~ 2

Author(s):

Renfeng Ma ◽

Congcong Wang ◽

Yixia Jin ◽

Xiaojing Zhou

Keyword(s):

Yangtze River ◽

Negative Impact ◽

Yangtze River Delta ◽

River Delta ◽

Impact Factors ◽

Kuznets Curve ◽

The Yangtze River ◽

Haze Pollution ◽

Economic Agglomeration ◽

The Yangtze River Delta

Haze pollution, a serious livelihood and environmental issue, has hindered China’s economic development. This paper, based on the improved output density model, empirically analyzes spatial patterns and impact factors of haze pollution within the Yangtze River Delta from 2015 to 2017 by statistical and spatial econometric models. The study shows that: (1) The characteristics of haze pollution due to seasonal changes are obvious in the Yangtze River Delta region, and the situation has gradually improved. (2) The haze pollution has significant local agglomeration characteristics and spatial heterogeneity, demonstrated as significant low-level agglomerations in Hangzhou, Ningbo, and Taizhou, and high agglomerations in Chuzhou, Yangzhou, Zhenjiang, and Taizhou. The polluted area clusters around the provincial boundary, and its level gradually decreases from northwest to southeast. There is a significant spatial positive correlation and spatial spillover effect of intercity haze pollution, which will have a negative impact on the region and surrounding areas. (3) The population growth, research and development (R&D) investment, industrial structure, industrial smoke and dust emissions, and urban construction in the Yangtze River Delta have positive impacts on haze pollution, while factors, such as investment intensity of foreign direct investment (FDI), energy consumption and precipitation, have a negative impact on smog pollution. However, there is no Kuznets curve relationship between smog pollution and economic growth. By optimizing spatial distribution, incorporating production factors, and sharing pollution control infrastructure, this paper shows that economic agglomeration has an inhibitory effect on haze pollution.

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Transport Paths and Identification for Potential Sources of Haze Pollution in the Yangtze River Delta Urban Agglomeration from 2014 to 2017

Atmosphere ◽

10.3390/atmos9120502 ◽

2018 ◽

Vol 9 (12) ◽

pp. 502 ◽

Cited By ~ 4

Author(s):

Linglong Zhu ◽

Yonghong Zhang ◽

Xi Kan ◽

Jiangeng Wang

Keyword(s):

Yangtze River ◽

Yangtze River Delta ◽

River Delta ◽

Urban Agglomeration ◽

The Yangtze River ◽

Haze Pollution ◽

Potential Sources ◽

Potential Pollution ◽

The Yangtze River Delta ◽

Haze Days

Besides local emissions, long-range transportation of polluted air masses also has a huge impact on haze pollution. In this study, the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model was used to determine the transport paths and potential sources of haze pollution in the Yangtze River Delta Urban Agglomeration. Haze days were determined by setting the threshold of meteorological elements. Shanghai, Hangzhou, Nanjing and Hefei were selected as four representative cities to calculate the −72 h backward transport trajectory of haze air mass; thus, the main transport path was obtained after clustering. A potential source contribution function and concentration weighted field were used to identify potential pollution sources of the study. The results showed that the number of haze days in the northern Yangtze River Delta Urban Agglomeration is much higher than that in the south. Haze days and Fine particulate matter (PM2.5) concentration showed a downward trend. The transport paths could be summarized as long-range transports from the northwest and coastal direction during the dry season and short-distance transports from all directions. −72 h air flow trajectories come from the higher altitudes in dry season than these in wet season. The main sources of potential pollution are Hebei, Shandong, Anhui and northern Jiangsu.

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