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Xu H, Guo S, Shi X, Wu Y, Pan J, Gao H, Tang Y, Han A. Machine learning-based analysis and prediction of meteorological factors and urban heatstroke diseases. Front Public Health 2024; 12:1420608. [PMID: 39104885 PMCID: PMC11299116 DOI: 10.3389/fpubh.2024.1420608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Accepted: 07/08/2024] [Indexed: 08/07/2024] Open
Abstract
Introduction Heatstroke is a serious clinical condition caused by exposure to high temperature and high humidity environment, which leads to a rapid increase of the core temperature of the body to more than 40°C, accompanied by skin burning, consciousness disorders and other organ system damage. This study aims to analyze the effect of meteorological factors on the incidence of heatstroke using machine learning, and to construct a heatstroke forecasting model to provide reference for heatstroke prevention. Methods The data of heatstroke incidence and meteorological factors in a city in South China from May to September 2014-2019 were analyzed in this study. The lagged effect of meteorological factors on heatstroke incidence was analyzed based on the distributed lag non-linear model, and the prediction model was constructed by using regression decision tree, random forest, gradient boosting trees, linear SVRs, LSTMs, and ARIMA algorithm. Results The cumulative lagged effect found that heat index, dew-point temperature, daily maximum temperature and relative humidity had the greatest influence on heatstroke. When the heat index, dew-point temperature, and daily maximum temperature exceeded certain thresholds, the risk of heatstroke was significantly increased on the same day and within the following 5 days. The lagged effect of relative humidity on the occurrence of heatstroke was different with the change of relative humidity, and both excessively high and low environmental humidity levels exhibited a longer lagged effect on the occurrence of heatstroke. With regard to the prediction model, random forest model had the best performance of 5.28 on RMSE and dropped to 3.77 after being adjusted. Discussion The incidence of heatstroke in this city is significantly correlated with heat index, heatwave, dew-point temperature, air temperature and zhongfu, among which the heat index and dew-point temperature have a significant lagged effect on heatstroke incidence. Relevant departments need to closely monitor the data of the correlated factors, and adopt heat prevention measures before the temperature peaks, calling on citizens to reduce outdoor activities.
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Affiliation(s)
- Hui Xu
- School of Management, Beijing University of Chinese Medicine, Beijing, China
| | - Shufang Guo
- School of Management, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaojun Shi
- School of Management, Beijing University of Chinese Medicine, Beijing, China
| | - Yanzhen Wu
- School of Management, Beijing University of Chinese Medicine, Beijing, China
| | - Junyi Pan
- School of Management, Beijing University of Chinese Medicine, Beijing, China
| | - Han Gao
- School of Humanities, Beijing University of Chinese Medicine, Beijing, China
| | - Yan Tang
- School of Management, Beijing University of Chinese Medicine, Beijing, China
| | - Aiqing Han
- School of Management, Beijing University of Chinese Medicine, Beijing, China
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Yang L, Li Q, Li Q, Zhao L, Luo Z, Liu Y. Different explanations for surface and canopy urban heat island effects in relation to background climate. iScience 2024; 27:108863. [PMID: 38361609 PMCID: PMC10867416 DOI: 10.1016/j.isci.2024.108863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/28/2023] [Accepted: 01/08/2024] [Indexed: 02/17/2024] Open
Abstract
The background climatic conditions and urban morphology greatly influence urban heat island effects (UHIs), but one-size-fits-all solutions are frequently employed to mitigate UHIs. Here, attribution models for surface UHIs (SUHIs) and canopy UHIs (CUHIs) were developed to describe UHI formation. The contribution of factors to SUHIs and CUHIs shows similar dependencies on background climate and urban morphology. Furthermore, the factors that mainly contributed to CUHIs were more complex, and anthropogenic heat was the more critical factor. Influence from urban morphology also highlights that there is no one-size-fit-all solution for heat mitigation at the neighborhood. In particular, maintaining a low building density should be prioritized, especially mitigating CUHIs. Moreover, it is more effective to prioritize urban irrigation maintenance over increasing green cover in arid regions but the opposite in humid regions. The work can provide scientific evidence to support developing general and regional guidelines for urban heat mitigation.
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Affiliation(s)
- Liu Yang
- State Key Laboratory of Green Building, Department of Architecture, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, P.R. China
| | - Qi Li
- State Key Laboratory of Green Building, Department of Architecture, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, P.R. China
- State Key Laboratory of Subtropical Building and Urban Science, School of Architecture, South China University of Technology, Guangzhou 510640, P.R. China
| | - Qiong Li
- State Key Laboratory of Subtropical Building and Urban Science, School of Architecture, South China University of Technology, Guangzhou 510640, P.R. China
| | - Lei Zhao
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Zhiwen Luo
- Welsh School of Architecture, Cardiff University, Cardiff, UK
| | - Yan Liu
- State Key Laboratory of Green Building, Department of Architecture, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, P.R. China
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Yong KH, Teo YN, Azadbakht M, Phung H, Chu C. The Scorching Truth: Investigating the Impact of Heatwaves on Selangor's Elderly Hospitalisations. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:ijerph20105910. [PMID: 37239636 DOI: 10.3390/ijerph20105910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/06/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
Global climate change has contributed to the intensity, frequency, and duration of heatwave events. The association between heatwaves and elderly mortality is highly researched in developed countries. In contrast, heatwave impact on hospital admissions has been insufficiently studied worldwide due to data availability and sensitivity. In our opinion, the relationship between heatwaves and hospital admissions is worthwhile to explore as it could have a profound impact on healthcare systems. Therefore, we aimed to investigate the associations between heatwaves and hospitalisations for the elderly by age group in Selangor, Malaysia, from 2010 to 2020. We further explored the impact of heatwaves on the risks of cause-specific hospital admissions across age groups within the elderly. This study applied generalized additive models (GAMs) with the Poisson family and distributed lag models (DLMs) to estimate the effect of heatwaves on hospitalisations. According to the findings, there was no significant increase in hospitalisations for those aged 60 and older during heatwaves; however, a rise in mean apparent temperature (ATmean) by 1 °C significantly increased the risk of hospital admission by 12.9%. Heatwaves had no immediate effects on hospital admissions among elderly patients, but significant delay effects were identified for ATmean with a lag of 0-3 days. The hospital admission rates of the elderly groups started declining after a 5-day average following the heatwave event. Females were found to be relatively more vulnerable than males during heatwave periods. Consequently, these results can provide a reference to improve public health strategies to target elderly people who are at the greatest risk of hospitalisations due to heatwaves. Development of early heatwave and health warning systems for the elderly would assist with preventing and reducing health risks while also minimising the burden on the whole hospital system in Selangor, Malaysia.
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Affiliation(s)
- Kun Hing Yong
- School of Medicine and Dentistry, Griffith University, Brisbane, QLD 4111, Australia
| | - Yen Nee Teo
- Institute of Malaysian and International Studies, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
| | - Mohsen Azadbakht
- Department of Infrastructure Engineering, University of Melbourne, Melbourne, VIC 3010, Australia
| | - Hai Phung
- School of Medicine and Dentistry, Griffith University, Brisbane, QLD 4111, Australia
| | - Cordia Chu
- School of Medicine and Dentistry, Griffith University, Brisbane, QLD 4111, Australia
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Jibhakate SM, Gehlot LK, Timbadiya PV, Patel PL. Spatiotemporal variability of extreme temperature indices and their implications over the heterogeneous river basin, India. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:664. [PMID: 37171502 DOI: 10.1007/s10661-023-11196-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 04/01/2023] [Indexed: 05/13/2023]
Abstract
The current study on spatiotemporal variability of temperature presents a holistic approach for quantifying the joint space-time variability of extreme temperature indices over the physio-climatically heterogeneous Tapi River basin (TRB) using two unsupervised machine learning algorithms, i.e., principal component analysis (PCA) and cluster analysis. The long-term variability in extreme temperature indices, recommended by the Expert Team on Climate Change Detection and Indices (ETCCDI), was evaluated for 1951-2016. The magnitude and statistical significance of the temporal trend in extreme temperature indices were estimated using non-parametric Sen's slope estimator and modified Mann Kendall (MMK) tests, respectively. The multivariate assessment of temporal trends using PCA resulted in four principal components (PCs) encapsulating more than 90% variability. The cluster analysis of corresponding PCs resulted in two spatial clusters exhibiting homogeneous spatiotemporal variability. Cluster 1 is characterized by significantly increasing hottest, very hot, and extremely hot days with rising average maximum temperature and intraday temperature variability. On the other hand, cluster 2 showed significantly rising coldest nights, mean minimum, mean temperature, and Tx37 with significantly decreasing intraday and interannual temperature variability, very cold, and extremely cold nights with reducing cold spell durations. The summertime heat stress computation revealed that the Purna sub-catchment of the Tapi basin is more vulnerable to various health issues and decreased work performance (> 10%) for more than 45 days per year. The current study dealing with the associated effects of rising temperature variability on crop yield, human health, and work performance would help policymakers formulate better planning and management strategies to safeguard society and the environment.
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Affiliation(s)
- Shubham M Jibhakate
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology Surat, Surat, Gujarat, 395007, India
| | - Lalit Kumar Gehlot
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology Surat, Surat, Gujarat, 395007, India
| | - P V Timbadiya
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology Surat, Surat, Gujarat, 395007, India.
| | - P L Patel
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology Surat, Surat, Gujarat, 395007, India
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De Toni L, Finocchi F, Jawich K, Ferlin A. Global warming and testis function: A challenging crosstalk in an equally challenging environmental scenario. Front Cell Dev Biol 2023; 10:1104326. [PMID: 36726592 PMCID: PMC9885165 DOI: 10.3389/fcell.2022.1104326] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/29/2022] [Indexed: 01/18/2023] Open
Abstract
Environmental pollution, accounting for both chemical and physical factors, is a major matter of concern due to its health consequences in both humans and animals. The release of greenhouse gases with the consequent increase in environmental temperature is acknowledged to have a major impact on the health of both animals and humans, in current and future generations. A large amount of evidence reports detrimental effects of acute heat stress on testis function, particularly on the spermatogenetic and steroidogenetic process, in both animal and human models, wich is largely related to the testis placement within the scrotal sac and outside the abdomen, warranting an overall scrotal temperature of 2°C-4°C lower than the core body temperature. This review will provide a thorough evaluation of environmental temperature's effect on testicular function. In particular, basic concepts of body thermoregulation will be discussed together with available data about the association between testis damage and heat stress exposure. In addition, the possible association between global warming and the secular decline of testis function will be critically evaluated in light of the available epidemiological studies.
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Affiliation(s)
- Luca De Toni
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy,*Correspondence: Luca De Toni,
| | - Federica Finocchi
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
| | - Kenda Jawich
- Department of Biochemistry and Microbiology, Faculty of Pharmacy, Damascus University, Damascus, Syria,Department of Biochemistry, International University for Science and Technology, Daraa, Syria
| | - Alberto Ferlin
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
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Di Bernardino A, Iannarelli AM, Diémoz H, Casadio S, Cacciani M, Siani AM. Analysis of two-decade meteorological and air quality trends in Rome (Italy). THEORETICAL AND APPLIED CLIMATOLOGY 2022; 149:291-307. [PMID: 35437335 PMCID: PMC9008384 DOI: 10.1007/s00704-022-04047-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 04/02/2022] [Indexed: 05/05/2023]
Abstract
UNLABELLED This study presents a trend analysis of a two-decade (2000-2020) series of surface meteorological and air quality data measured in Rome (Italy). Data series are collected at three sites in Rome downtown and its coastal surroundings. This paper fills the gap due to missing or incomplete recent information about the meteorological and atmospheric composition tendencies in the Rome area. Datasets are subjected to in-depth quality control and to statistical analysis to verify the data homogeneity, whilst trend analysis is performed using the Seasonal Kendall test. The results show a statistically significant positive trend for average air temperature (0.07 °C year-1 in urban and coastal sites), whilst maximum and minimum temperatures increase more in urban (0.10 °C year-1) than in coastal (0.01 °C year-1) environment. The water vapour mixing ratio trend is higher in the city (0.10 g kg-1 year-1) than along the coast (0.03 g kg-1 year-1). The heat index tendency is more pronounced in the Rome centre (0.11 °C year-1) than in the coast (0.06 °C year-1). The monthly cumulative precipitations do not show statistically significant trends. On the other hand, air quality generally improved: surface pollutant concentrations show a significant decrease thanks to the reduction of local emissions (C6H6, - 0.12 µg m-3 year-1; SO2, - 0.09 µg m-3 year-1; CO, - 0.02 mg m-3 year-1; NOx, - 1.28 µg m-3 year-1; NO, - 0.38 µg m-3 year-1; NO2, - 0.60 µg m-3 year-1, PM10, - 0.35 µg m-3 year-1). Only O3 shows a statistically significant positive trend (0.15 µg m-3 year-1), in agreement with wider scale studies. The outcomes suggest that whilst local and national policies contribute to the improvement of air quality, the rising of temperature-as likely consequence of climate change-may be an emerging cause of concern for human thermal discomfort and potential effect on the conservation of tangible immovable heritage. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s00704-022-04047-y.
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Affiliation(s)
| | | | - Henri Diémoz
- ARPA Valle d’Aosta, Saint-Christophe, 11020 Aosta, Italy
| | | | - Marco Cacciani
- Physics Department, Sapienza University of Rome, 00185 Rome, Italy
| | - Anna Maria Siani
- Physics Department, Sapienza University of Rome, 00185 Rome, Italy
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