ArticleScientific reports2025
Temporal dynamics and relationship between negative air ions and environmental factors in subtropical forests, China.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Negative air ions (NAIs) in forest air contribute to air purification, improve respiratory system function, enhance immunity, reduce fatigue, and alleviate stress and anxiety. However, NAIs are easily influenced by meteorological factors, air quality factors, and radiation factors, and the mechanisms of these influences remain unclear. To investigate the dynamic changes of NAIs and their driving factors, this study focuses on the long-term monitoring of NAIs in the Yunzhong Mountain forest of the South Asian subtropical region in China. Using linear mixed models, structural equation models, and other ecological niche models, the study explores the characteristics of the dynamic changes in NAIs and their responses to meteorological factors, air quality factors, and radiation factors in the Yunzhong Mountain forest. The results showed that: (1) The seasonal variation of NAIs in the Yunzhong Mountain forest followed the pattern of summer > autumn > winter > spring. In terms of monthly dynamics, the highest concentrations of NAIs occurred in August. Regarding daily dynamics, the concentration of NAIs gradually increased from early morning, reaching its peak at 8:00 AM, after which it declined, reaching the lowest concentrations between 11:00 AM and 12:00 PM. (2) Correlation analysis showed that the concentrations of NAIs were significantly negatively correlated with NO
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