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Foreseeable Co-occurring O3 and PM2.5 Pollution in Eastern China Driven by Climate Teleconnections
Xiaorui Zhang1,2, Meng Gao2,3, Gregory R Carmichael4
1Key Laboratory for Geographical Process Analysis and Simulation of Hubei Province, College of Urban and Environmental Sciences, Central China Normal University, Wuhan 430000, China.
ACS Environmental Au
|November 24, 2025
Summary
Climate factors significantly influence China
Area of Science:
- Atmospheric Chemistry and Climate Science
Background:
- Co-occurrence of surface ozone (O3) and particulate matter (PM2.5) pollution (COP) is a major environmental issue in China.
- The impact of climate variability on COP frequency is not well understood.
Purpose of the Study:
- To investigate the influence of climate factors on the interannual variability of COP frequency in Eastern China.
- To identify predictive signals for COP frequency.
Main Methods:
- Analysis of three major modes of interannual variability in COP frequency.
- Correlation analysis with preseasonal sea surface temperatures (SSTs) and Arctic sea ice (SI) loss.
- Utilizing observational data and climate model simulations.
- Development of a predictive model for COP frequency.
Main Results:
- Three distinct modes of COP variability were identified: a consistent spatial pattern, a North-South dipole, and coastal sensitivity.
- Western Pacific cooling, Barents Sea SI loss, and North Atlantic Oscillation-driven SST anomalies were linked to these modes.
- These climate factors influence atmospheric circulation patterns, affecting pollutant distribution.
- A predictive model demonstrated capability in forecasting COP frequency three months ahead.
Conclusions:
- Climate factors, including SSTs and SI, play a crucial role in modulating COP frequency in China.
- Understanding these climate links allows for improved pollution control strategies.
- The findings support enhanced preparedness for air pollution events.
Keywords:
air pollution complexclimate teleconnectionsparticulate matter pollutionseasonal predictionsurface ozone pollutionMore Related Videos
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