A mid-latitude cut-off low fuels widespread near-surface O3 enhancements in China via multiple pathways

Key Points

• Increased near-surface ozone levels were observed due to a mid-latitude cut-off low.
• Ozone levels rose significantly, exceeding safe limits on several occasions.
• Analysis employed meteorological data and pollution tracking methods to identify sources of enhancement.
• Findings highlight the urgent need for improved air quality management in affected regions.