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- Title
Relationship between negative air ion and PM<sub>2.5</sub> in Quercus variabilis under natural conditions.
- Authors
CAI Lulu; SUN Shoujia; SHI Guangyao; DU Lingtong; NI Xilu; ZHANG Jinsong; MENG Ping
- Abstract
In recent years, PM2.5 pollution has become a most important source of air pollution. Prolonged exposure to high PM25 concentrations can give rise to severe health issues. Negative air ion (NAI) is an important indicator for measuring air quality, which is collectively known as the 'air vitamin'. However, the intricate and fluctuating meteorological conditions and vegetation types result in numerous uncertainties in the correlation between PM2.5through positioning observation during the period of June to September in 2019 and 2020 under the condition of relatively constant leaf area in Quercus variabilis forest, a typical forest in warm temperate zones. We investigated the spatiotemporal variation of PM2.5 and NAI under consistent meteorological conditions, established the correlation between PM2.5 and NAI, and explicated the impact mechanism of PM2.5 on NAI in natural conditions. The results showed that NAI decreased exponentially with the increases in natural PM2.5, with a significant negative correlation (y = 1148.79 x-0.123). The decrease rates of NAI in PM2.5 20-40, 40-80, 80-100 and 100-120 µg • m-3 were 40 .1%, 36.2%, 9.4%, 2 .4%, 5.1% and 6.8%, respectively. Results of the sensitivity analysis showed that the PM2.5 concentration range of 0-40 µg • m-3 was the sensitive range that affected NAI. Our findings could provide a scientific basis for better understanding the response mechanisms of NAI to environmental factors.
- Subjects
ANIONS; OAK; AIR pollution; AIR quality; LEAF area
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2024, Vol 35, Issue 2, p347
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202402.032