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Spatiotemporal trends in PM

Nan-Nan Zhang1, Fang Ma2, Chang-Bo Qin3

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Summary
This summary is machine-generated.

China's Air Pollution Prevention and Control Action Plan (APPCAP) reduced PM2.5 by over 30%. However, air quality remains a concern for over a billion people, especially in large cities, necessitating targeted Joint Prevention and Control of Atmospheric Pollution (JPCAP) strategies.

Keywords:
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Area of Science:

  • Environmental Science
  • Atmospheric Chemistry
  • Public Health

Background:

  • China's Air Pollution Prevention and Control Action Plan (APPCAP) aimed to improve air quality.
  • Assessing the effectiveness and remaining challenges of APPCAP is crucial for public health.

Purpose of the Study:

  • To evaluate air quality improvements and remaining risks following APPCAP implementation.
  • To identify highly inter-correlated regions for targeted pollution control.

Main Methods:

  • Analysis of air quality data using arithmetic mean and percentile methods.
  • Application of a complex network correlation model to PM2.5 concentration data.
  • Demarcation of regions based on PM2.5 synchronicity for Joint Prevention and Control of Atmospheric Pollution (JPCAP).

Main Results:

  • National annual mean PM2.5 concentration decreased by over 30% post-APPCAP.
  • Over 1 billion people remain exposed to PM2.5 exceeding WHO Interim Target-1.
  • Large cities (>10 million population) show higher pollution, while smaller locations (<1 million) meet standards.
  • Seven key JPCAP regions with synchronized PM2.5 levels were identified.

Conclusions:

  • APPCAP has improved air quality, but significant public exposure to PM2.5 persists.
  • Population size is a factor in regional air pollution levels.
  • Region-specific JPCAP strategies are recommended, applicable globally.