海南热带雨林空气负离子的时空变化规律、影响因素及环境健康评估

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Abstract To investigate the spatio-temporal variations, influential factors and environmental health effects of negative air ions (NAIs) in Hainan tropical rainforests, a mobile comprehensive measurement platform was utilized to carry out field observation during typical tourist season (January), four types of typical forest stands (evergreen broad-leaved, deciduous broad-leaved, coniferous and bamboo forests) at eleven different altitudes in the Wuzhishan area of the Hainan Tropical Rainforest National Park were measured. The concentrations, spatiotemporal variations of NAIs, and their relationships with forest types, meteorological factors, air quality, and volatile organic compounds (VOCs) were analyzed. A comprehensive evaluation method for the ecological health function of tropical rainforest based on the Forest Health Index (FHI) was established. The results showed that the NAI concentration in the Wuzhishan area was relatively high (3541±882)moles/cm³, reaching Level VI of the World Health Organization's air freshness classification standard. The NAI concentration was increased with altitude initially and then decreased. Coniferous forest was found to have the highest NAI concentration, followed by broad-leaved forest, with bamboo forest having the lowest. A total of 66VOCs were detected, with sesquiterpenes and oxygenated organic compounds accounting for over 80%. NAIs were shown significant positive correlations with relative humidity, fine particulate matter, and monoterpenes, and significant negative correlations with sesquiterpenes and aromatic hydrocarbons. The FHI in the afternoon was generally found to be higher than that in the morning, with most sampling sites reaching Level II or above.

Key words： Wuzhishan tropical rainforest negative air ions plant volatiles forest therapy

Received: 30 July 2024

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	XU Rui-yun
	GONG Dao-cheng
	MENG Xin-xin
	LIN You-jing
	LI Zhu
	CHEN Si-jun
	CHEN Xi
	CHANG Qing-hua
	LIANG Ye
	WANG Lei
	LIU Shi-wei
	MA Fang-yuan
	LI Qin-qin
	ZHANG Cheng-liang
	DENG Shuo
	WANG Hao
	WANG Bo-guang

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XU Rui-yun,GONG Dao-cheng,MENG Xin-xin等. Spatio-temporal variations, influential factors and environmental health assessment of negative air ions (NAIs) in Hainan tropical rainforests[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(2): 657-670.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I2/657

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