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Xiao S, Wei T, Petersen JD, Zhou J, Lu X. Biological effects of negative air ions on human health and integrated multiomics to identify biomarkers: a literature review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27133-8. [PMID: 37170052 PMCID: PMC10175061 DOI: 10.1007/s11356-023-27133-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/17/2023] [Indexed: 05/13/2023]
Abstract
Environmental pollution seriously affects human health. The concentration of negative air ions (NAIs), which were discovered at the end of the nineteenth century, is one of the factors used to evaluate air quality. Additionally, NAIs have been widely considered markers by scholars due to their unique biological function. The aim of this study was to summarize existing research and propose future research on the generation and temporal and spatial dynamic patterns of NAIs concentrations as well as the relationship between NAIs and human health. We identified 187 studies (published January 2013-January 2023) that met our inclusion criteria. Fourteen English studies evaluated the effects of NAIs on depression, the cardiovascular system, the respiratory system, reproduction and development, cognition, and sports muscle injury. Only two studies reported the associations of NAIs exposure with metabolic omics. NAIs concentrations vary temporally with solar radiation, air temperature, and relative humidity, while the temporal dynamic patterns of NAIs are affected by season, time, meteorological factors, air quality index, geographical location, forest vegetation, and other factors. Researchers have shown that exposure to NAIs may benefit our health by changing amino acid metabolism, which mainly manifests as increased anti-inflammation and reduced inflammation and antioxidation. Furthermore, exposure to NAIs promotes energy production, affects the expression of c-fos, and regulates 5-HT levels. There has been considerable interest in the potential effects of NAIs on human health and well-being, but the conclusions have been inconsistent and the mechanisms remain unclear. The use of omics to elucidate the biological mechanism of NAIs is relatively new and has some advantages.
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Affiliation(s)
- Sha Xiao
- International School of Public Health and One Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, 571199, China
- Department of Toxicology, School of Public Health, China Medical University, Shenyang, 110122, China
| | - Tianjing Wei
- Department of Toxicology, School of Public Health, China Medical University, Shenyang, 110122, China
| | - Jindong Ding Petersen
- International School of Public Health and One Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, 571199, China
| | - Jing Zhou
- International School of Public Health and One Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, 571199, China
| | - Xiaobo Lu
- Department of Toxicology, School of Public Health, China Medical University, Shenyang, 110122, China.
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Liu S, Li C, Chu M, Zhang W, Wang W, Wang Y, Guo X, Deng F. Associations of forest negative air ions exposure with cardiac autonomic nervous function and the related metabolic linkages: A repeated-measure panel study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:158019. [PMID: 35973547 DOI: 10.1016/j.scitotenv.2022.158019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/29/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Forest environment has many health benefits, and negative air ions (NAI) is one of the major forest environmental factors. Many studies have explored the effect of forest environment on cardiac autonomic nervous function, while forest NAI in the among function and the underlying mechanism still remain unclear. To explore the associations and molecular linkages between short-term exposure to forest NAI and heart rate variability (HRV), a repeated-measure panel study was conducted among 31 healthy adults. Participants were randomly selected to stay in a forest park for 3 days and 2 nights. Individual exposures including NAI were monitored simultaneously and HRV indices were measured repeatedly at the follow-up period. Urine samples were collected for non-targeted metabolomics analysis. Mixed-effect models were adopted to evaluate associations among NAI, HRV indices and metabolites. The median of NAI concentration was 68.11 (138.20) cm-3 during the study period. Short-term exposure to forest NAI was associated with the ameliorative HRV indices, especially the excitatory parasympathetic nerve. For instance, per interquartile range increase of 5-min moving average of NAI was associated with 9.99 % (95%CI: 8.95 %, 11.03 %) increase of power in high frequency. Eight metabolites were associated with NAI exposure. The down-regulated tyrosine metabolism was firstly observed, followed by other amino acid metabolic alterations. The NAI-related metabolic changes reflect the reduction of inflammation and oxidative stress. HRV indices were associated with 25 metabolites, mainly including arginine, proline and histidine metabolism. Short-term exposure to forest NAI is beneficial to HRV, especially to the parasympathetic nerve activity, by successively disturbing different metabolic pathways which mainly reflect the increased anti-inflammation and the reduced inflammation. The results will provide epidemiological evidences for developing forest therapy and improving cardiac autonomic nervous function.
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Affiliation(s)
- Shan Liu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Chen Li
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Mengtian Chu
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Wenlou Zhang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Wanzhou Wang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Yazheng Wang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Xinbiao Guo
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China
| | - Furong Deng
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China.
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Hu YQ, Niu TT, Xu JM, Peng L, Sun QH, Huang Y, Zhou J, Ding YQ. Negative air ion exposure ameliorates depression-like behaviors induced by chronic mild stress in mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:62626-62636. [PMID: 35411516 PMCID: PMC9464145 DOI: 10.1007/s11356-022-20144-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 04/04/2022] [Indexed: 04/15/2023]
Abstract
The presence of negative air ions (NAI) is suggested to be a beneficial factor in improving psychological status and used in treating depression as an alternative approach. However, more biological evidence from animal models is needed to ensure the effects of NAI on the mood regulation, through which can facilitate identification of possible underlying mechanisms. In this study, the chronic mild stress (CMS) protocol was used to induce depressive-like behaviors in mice, and the effects of NAI exposure on CMS-induced depression-like behaviors were examined. Thirty-day NAI exposure prevented the CMS-induced depression-like behaviors as shown by the restoration of sucrose preference and reduced immobility time in the tail suspension test. In addition, the elevation of serous corticosterone was present in CMS-treated mice but not existed in those with the NAI exposure. Furthermore, we observed altered ratios of some cytokines secreted by type 1 T helper (Th1) cells and Th2 cells in CMS-treated mice, but it could be restored after NAI exposure. In conclusion, NAI intervention is able to ameliorate CMS-induced depression-like behaviors in mice, and this effect is associated with the alteration of corticosterone and functional rebalance between Th1 and Th2 cells.
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Affiliation(s)
- Yun-Qing Hu
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, People's Republic of China
| | - Ting-Ting Niu
- Institute of Occupational Health and Environmental Health, School of Public Health, Lanzhou University, No. 199 Donggang West Road, Lanzhou, Gansu, 730000, People's Republic of China
| | - Jian-Ming Xu
- Shanghai Typhoon Institute, CMA, No. 166 Puxi Road, Shanghai, 200030, People's Republic of China
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, No. 166 Puxi Road, Shanghai, 200030, People's Republic of China
| | - Li Peng
- Shanghai Typhoon Institute, CMA, No. 166 Puxi Road, Shanghai, 200030, People's Republic of China
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, No. 166 Puxi Road, Shanghai, 200030, People's Republic of China
| | - Qing-Hua Sun
- School of Public Health, Joint China-US Research Center for Environment and Pulmonary Diseases, Zhejiang Chinese Medical University, No. 548 Binwen Road, Hangzhou, 310053, People's Republic of China
| | - Ying Huang
- Department of Laboratory Animal Science, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, People's Republic of China
| | - Ji Zhou
- Shanghai Typhoon Institute, CMA, No. 166 Puxi Road, Shanghai, 200030, People's Republic of China
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, No. 166 Puxi Road, Shanghai, 200030, People's Republic of China
- Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, No. 220 Handan Road, Shanghai, 200433, People's Republic of China
| | - Yu-Qiang Ding
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, People's Republic of China.
- Department of Laboratory Animal Science, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, People's Republic of China.
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Fdez-Arroyabe P, Salcines C, Kassomenos P, Santurtún A, Petäjä T. Electric charge of atmospheric nanoparticles and its potential implications with human health. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:152106. [PMID: 34864039 DOI: 10.1016/j.scitotenv.2021.152106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/27/2021] [Accepted: 11/27/2021] [Indexed: 06/13/2023]
Abstract
This research presents a pilot project developed within the framework of the COST Action 15,211 in which atmospheric nanoparticles were measured in July 2018, in a maritime environment in the city of Santander in Northern Spain. ELPI® + (Electrical Low-Pressure Impactor) was used to measure nanoparticle properties (electric charge, number, size distribution and surface area) from 6 nm to 10,000 nm with 14 size channels. This study focused on the range between 6 and 380 nm. It considered atmospheric nanoparticle electric charge with surface area, deposited and number by size distribution at human respiratory tract regions in a standard person in Santander according to the human respiratory tract model of ICRP 94. An empirical distribution of nanoparticles deposited in the human respiratory tract model and its electric charge is presented for the city of Santander as the main output. Percentages of total and regional deposition in human respiratory tract model were calculated for the Atlantic climate. Nanoparticles have shown an alveolar surface area deposition plateau with a size distribution range between 6 nm to 150 nm. Negative charge of nanoparticles was clearly associated with primary atmospheric nanoparticles being mainly deposited in the alveolar region where a Brownian mechanism of deposition is predominant. We can demonstrate that electric charge may be a key element in explaining Brownian deposition of the smallest particles in the human respiratory tract and that it can be linked to theoretical positive and negative impacts on human health according to several biometeorological studies. To support our analysis, aerosol samples were characterized with transmission electron microscopy and Confocal Raman spectrometer to determinate morphology, size, chemical composition, and structure. The toxicological effects of the samples with the alveolar surface area had a greater deposition, remain to be studied.
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Affiliation(s)
- Pablo Fdez-Arroyabe
- University of Cantabria, Department of Geography and Planning, Geobiomet Research Group, Santander, Spain.
| | - Ciro Salcines
- University of Cantabria, Health and Safety Unit, Infrastructures Service, Santander, Spain.
| | - Pavlos Kassomenos
- University of Ioannina, Department of Physics, Laboratory of Meteorology, GR-45110 Ioannina, Greece.
| | - Ana Santurtún
- University of Cantabria, Department of Physiology and Pharmacology, Geobiomet Research Group, Santander, Spain.
| | - Tuukka Petäjä
- Institute for Atmospheric and Earth System Research (INAR), Physics, Faculty of Science, FI-00014 University of Helsinki, Finland.
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Hu L, Feng D, Li Y, Xu J, Zheng J. The Effect of Safety Signs on the Monitoring of Conflict and Erroneous Response. Front Psychol 2022; 13:830929. [PMID: 35250774 PMCID: PMC8891479 DOI: 10.3389/fpsyg.2022.830929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/17/2022] [Indexed: 11/26/2022] Open
Abstract
The safety sign is important in our daily life and workplace to prevent potential safety issues. However, it remains undetermined whether the safety signs would influence the cognitive control ability of the people, which serves to guide the behaviors in a goal-directed manner. Therefore, this study aimed to examine the effect of safety signs on cognitive control by uncovering the behavioral performance and neural manifestations underlying the monitoring of conflict and error. The participants performed a flanker task after watching low- and high-hazard safety signs with the electroencephalogram (EEG) data recorded continually. The behavioral results indicated a classic congruency effect with higher accuracy rate and faster response time under a congruent condition compared to an incongruent condition. However, no hazard effect on behavioral performances was observed. The results of event-related potentials (ERPs) demonstrated a more negative N2 elicited by the incongruent trials and an increased (error-related negativity) ERN difference between the error and correct responses in the high-hazard condition compared to those in the low-hazard condition, implying that the monitoring of the conflict and error were both enhanced after watching the high-hazard safety signs. This study contributes to the understanding of the relationship between safety signs and cognitive control, and further expand the measurements that can be applied to assess the effectiveness of safety signs design.
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Affiliation(s)
- Linfeng Hu
- School of Management, Zhejiang University of Technology, Hangzhou, China
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
- Zhejiang Hantemu Valve Co., Ltd., Lishui, China
| | - Dingzhong Feng
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Yelang Li
- Zhejiang Hantemu Valve Co., Ltd., Lishui, China
| | - Jinwu Xu
- Zhejiang Hantemu Valve Co., Ltd., Lishui, China
| | - Jiehui Zheng
- Alibaba Business School, Hangzhou Normal University, Hangzhou, China
- School of Management, Zhejiang University, Hangzhou, China
- *Correspondence: Jiehui Zheng,
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Shen C, Jiang Q, Luo Y, Long J, Tai X, Liu S. Stroop interference in children with developmental dyslexia: An event-related potentials study. Medicine (Baltimore) 2021; 100:e26464. [PMID: 34160450 PMCID: PMC8238329 DOI: 10.1097/md.0000000000026464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 05/25/2021] [Indexed: 01/04/2023] Open
Abstract
Previous studies have identified inhibitory deficits in dyslexic children, but we have little understanding of their neural mechanisms, especially for Chinese children with developmental dyslexia.We used a double-blind controlled trial to study the electroencephalogram responses of dyslexic and non-dyslexic children when performing the Stroop color-word test.Behavioral data showed differences in response time and accuracy between the 2 groups. In the event-related potentials (ERP) results, dyslexic children displayed larger P2 and P3b on congruent trials, while non-dyslexic children displayed larger P2 and P3b on incongruent trials, the 2 groups showed opposite brain activation patterns on the Stroop test.Dyslexic children have poor inhibitory function, and this poor inhibition may be related to their abnormal brain activation patterns.
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Affiliation(s)
- Chengwei Shen
- Department of Psychology, School of Medical Humanitarians
| | - Qi Jiang
- Department of Psychology, School of Medical Humanitarians
| | - Yan Luo
- Department of Psychology, School of Medical Humanitarians
- Guiyang Maternal and Child Health Care Hospital
| | - Ji Long
- School of Public Health, Guizhou Medical University, Guiyang, China
| | - Xiujuan Tai
- Guiyang Maternal and Child Health Care Hospital
| | - Shuqing Liu
- Guiyang Maternal and Child Health Care Hospital
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Della Vecchia A, Mucci F, Pozza A, Marazziti D. Negative Air Ions in Neuropsychiatric Disorders. Curr Med Chem 2021; 28:2521-2539. [PMID: 32603272 DOI: 10.2174/0929867327666200630104550] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/04/2020] [Accepted: 05/14/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Air ions (AIs) are clusters of ionized particles present in the atmosphere, carrying an electrical charge of negative or positive polarity. Past speculations suggested that exposure to positive air ions may be harmful, while exposure to negative air ions (NAIs) may be associated with beneficial health effects. Increasing attention has been directed towards investigating the potential effect of NAIs on human brain activities since initial observations of their beneficial effects on some cognitive processes and mood. AIMS Given the paucity and scattered literature, our paper aims to review the available studies on potential positive effects of NAIs exposure on cognitive performances and depression. DISCUSSION The review of the literature seems to confirm the effects of NAIs on several brain functions. Indeed, a significant association between NAIs exposure and both well-being and high cognitive performances has been described. Furthermore, exposure to high concentrations of NAIs could be related to the improvement of depressive symptoms. CONCLUSION A growing evidence of data, although not yet conclusive, would suggest that NAIs might improve cognitive processes. These findings require specific and urgent controlled trials adopting systems based on AIs release to possibly prevent and treat cognitive dysfunctions present in a broad range of neuropsychiatric conditions.
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Affiliation(s)
- Alessandra Della Vecchia
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma 67, 56100 Pisa, Italy
| | - Federico Mucci
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma 67, 56100 Pisa, Italy
| | - Andrea Pozza
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Donatella Marazziti
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma 67, 56100 Pisa, Italy
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Liu W, Huang J, Lin Y, Cai C, Zhao Y, Teng Y, Mo J, Xue L, Liu L, Xu W, Guo X, Zhang Y, Zhang JJ. Negative ions offset cardiorespiratory benefits of PM 2.5 reduction from residential use of negative ion air purifiers. INDOOR AIR 2021; 31:220-228. [PMID: 32757287 DOI: 10.1111/ina.12728] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
Negative ion air purifiers (NIAPs), as a less costly alternative to the HEPA filtration, have been increasingly deployed in China and potentially elsewhere. While reducing indoor concentrations of fine particulate matter (PM2.5 ), NIAPs generate massive amounts of negative ions that may be of health concern. We performed week-long interventions with NIAPs in the dormitories of 56 healthy college students living in Beijing. In a randomized order, each student underwent a true and a sham NIAP session. Cardiorespiratory outcomes were measured before and after each session. The use of true NIAPs reduced indoor PM2.5 concentrations significantly, while notably increased negative ion levels. Increases in PM2.5 and negative ion (NI) exposure were independently associated with increased urinary concentration of malondialdehyde, a biomarker of systemic oxidative stress, resulting in a null net effect of NIAP on malondialdehyde. Likewise, no significant net effects of NIAPs were observed for other outcomes indicative of lung function, vascular tone, arterial stiffness, and inflammation. Our findings suggest that negative ions, possibly along with their reaction products with the room air constituents, adversely affect health. The downsides do not support the use of NIAPs as a health-based mitigation strategy to reduce PM2.5 exposure, especially in residences with PM2.5 concentrations that are not extremely high.
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Affiliation(s)
- Wei Liu
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China
- Beijing Key Lab of Indoor Air Quality Evaluation and Control, Beijing, China
- Institute for Health and Environment, Chongqing University of Science and Technology, Chongqing, China
| | - Jing Huang
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China
| | - Yan Lin
- Global Health Institute & Nicholas School of the Environment, Duke University, Durham, NC, USA
| | - Chaorui Cai
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China
- Beijing Key Lab of Indoor Air Quality Evaluation and Control, Beijing, China
| | - Yan Zhao
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China
| | | | - Jinhan Mo
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China
- Beijing Key Lab of Indoor Air Quality Evaluation and Control, Beijing, China
| | - Lijun Xue
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China
| | - Li Liu
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China
- Beijing Key Lab of Indoor Air Quality Evaluation and Control, Beijing, China
| | - Wei Xu
- Institute of Building Environment and Energy, China Academy of Building Research, Beijing, China
| | - Xinbiao Guo
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China
| | - Yinping Zhang
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, China
- Beijing Key Lab of Indoor Air Quality Evaluation and Control, Beijing, China
| | - Junfeng Jim Zhang
- Global Health Institute & Nicholas School of the Environment, Duke University, Durham, NC, USA
- Duke Kunshan University, Kunshan, China
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Yue C, Yuxin Z, Nan Z, Dongyou Z, Jiangning Y. An inversion model for estimating the negative air ion concentration using MODIS images of the Daxing'anling region. PLoS One 2020; 15:e0242554. [PMID: 33232344 PMCID: PMC7685430 DOI: 10.1371/journal.pone.0242554] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 11/04/2020] [Indexed: 01/10/2023] Open
Abstract
The negative air ion (NAI) concentration is an essential indicator of air quality and atmospheric pollution. The NAI concentration can be used to monitor air quality on a regional scale and is commonly determined using field measurements. However, obtaining these measurements is time-consuming. In this paper, the relationship between remotely sensed surface parameters (such as land surface temperature, normalized difference vegetation index (NDVI), and leaf area index) obtained from MODIS data products and the measured NAI concentration using a stepwise regression method was analyzed to estimate the spatial distribution of the NAI concentration and verify the precision. The results indicated that the NAI concentration had a negative correlation with temperature, leaf area index (LAI), and gross primary production while it exhibited a positive correlation with the NDVI. The relationship between land surface temperature and the NAI concentration in the Daxing’anling region is expressed by the regression equation of y = -35.51x1 + 11206.813 (R2 = 0.6123). Additionally, the NAI concentration in northwest regions with high forest coverage was higher than that in southeast regions with low forest coverage, suggesting that forests influence the air quality and reduce the impact of environmental pollution. The proposed inversion model is suitable for evaluating the air quality in Daxing’anling and provides a reference for air quality evaluation in other areas. In the future, we will expand the quantity and distribution range of sampling points, conduct continuous observations of NAI concentrations and environmental parameters in the research areas with different land-use types, and further improve the accuracy of inversion results to analyze the spatiotemporal dynamic changes in NAI concentration and explore the possibility of expanding the application areas of NAI monitoring.
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Affiliation(s)
- Cui Yue
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin, China
| | - Zhao Yuxin
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin, China
| | - Zhang Nan
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin, China
| | - Zhang Dongyou
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin, China
- * E-mail:
| | - Yang Jiangning
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin, China
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