scholarly journals Identifying ‘persistent temperature inversion’ events in a Subalpine Basin using Radon-222

2019 ◽  
Author(s):  
Dafina Kikaj ◽  
Janja Vaupotič ◽  
Scott Chambers
Keyword(s):  
Public Health ◽  
Air Quality ◽  
Atmospheric Stability ◽  
Poor Performance ◽  
Temperature Inversion ◽  
World Health Organisation ◽  
World Health ◽  
Winter Period ◽  
Intermittent Turbulence ◽  
Stable Conditions

Abstract. One year of meteorological and atmospheric radon observations in a topographically-complex Subalpine Basin are used to identify ‘persistent temperature inversion’ (PTI) events. PTI events play a key role in public health due to the accumulation of urban pollutants that they cause. Two identification techniques are compared: a new method, based on single-height radon measurements from a single centrally-located station, and an existing approach based on observations from eight weather stations around the Subalpine Basin. After describing the radon-based method (RBM), its efficacy is compared with that of the existing pseudo-vertical temperature gradient method (TGM). The RBM identified 6 PTI events over the year (4 in winter, 2 in autumn), a subset of the 17 events identified by the TGM. The RBM is demonstrated to be more consistent in its identification of PTI events, and more selective of persistent strongly stable conditions. Furthermore, its performance is seasonally independent. The comparatively poor performance of the TGM was attributed to seasonal inconsistencies in the validity of the method’s key assumptions (influenced by mesoscale processes, such as local drainage flows, nocturnal jets, and intermittent turbulence influence), and a lack of snow cover in the basin for the 2016–2017 winter period. Corresponding meteorological quantities for RBM PTI events (constituting 27 % of the autumn–winter cold season), were well characterised. PTI wind speeds in the basin were consistently low over the whole diurnal cycle (typically 0.2–0.6 m s−1). The comparative efficacy of the RBM for PTI air quality assessment is demonstrated using hourly PM10 observations throughout the year. Peak hourly mean PM10 concentrations for winter (autumn) PTI events were underestimated by 13 µg m−3 (11 µg m−3) by the TGM compared with the RBM. Only the RBM indicated that nocturnal hourly mean PM10 values in winter PTI events can exceed 100 µg m−3, the upper threshold of low-level short-term PM10 exposure according to World Health Organisation guidelines. The efficacy, simplicity and cost effectiveness of the RBM for identifying PTI events has the potential to make it a powerful tool for urban air quality management in complex terrain regions; for which it adds an additional dimension to contemporary atmospheric stability classification tools. Furthermore, the long-term consistency of the radon source function will enable the RBM to be used in the same way in future studies, enabling the relative magnitude of PTI events to be gauged, which is expected to assist with the assessment of public health risks.

scholarly journals Identifying persistent temperature inversion events in a subalpine basin using radon-222

2019 ◽  
Vol 12 (8) ◽  
pp. 4455-4477 ◽  
Author(s):  
Dafina Kikaj ◽  
Janja Vaupotič ◽  
Scott D. Chambers
Keyword(s):  
Public Health ◽  
Air Quality ◽  
Atmospheric Stability ◽  
Poor Performance ◽  
Temperature Inversion ◽  
Relative Magnitude ◽  
World Health ◽  
Winter Period ◽  
Intermittent Turbulence ◽  
Stable Conditions

Abstract. One year of meteorological and atmospheric radon observations in a topographically complex subalpine basin are used to identify persistent temperature inversion (PTI) events. PTI events play a key role in public health due to the accumulation of urban pollutants that they cause. Two techniques are compared: a new radon-based method (RBM), based on single-height 222Rn measurements from a single centrally located station, and an existing pseudo-vertical temperature gradient method (TGM) based on observations from eight weather stations around the subalpine basin. The RBM identified six PTI events (four in winter, two in autumn), a subset of the 17 events identified by the TGM. The RBM was more consistent in its identification of PTI events for all seasons and more selective of persistent strongly stable conditions. The comparatively poor performance of the TGM was attributed to seasonal inconsistencies in the validity of the method's key assumptions (influenced by mesoscale processes, such as local drainage flows, nocturnal jets, and intermittent turbulence influence) and a lack of snow cover in the basin for the 2016–2017 winter period. Corresponding meteorological quantities for RBM PTI events (constituting 27 % of the autumn–winter cold season) were well characterized. PTI wind speeds in the basin were consistently low over the whole diurnal cycle (typically 0.2–0.6 m s−1). Suitability of the two techniques for air quality assessment was compared using hourly PM10 observations. Peak PM10 concentrations for winter (autumn) PTI events were underestimated by 13 µg m−3 (11 µg m−3) by the TGM compared with the RBM. Only the RBM indicated that nocturnal hourly mean PM10 values in winter PTI events can exceed 100 µg m−3, the upper threshold of low-level short-term PM10 exposure according to World Health Organization guidelines. The efficacy, simplicity, and cost effectiveness of the RBM for identifying PTI events has the potential to make it a powerful tool for urban air quality management in complex terrain regions, for which it adds an additional dimension to contemporary atmospheric stability classification tools. Furthermore, the long-term consistency of the radon source function will enable the RBM to be used in the same way in future studies, enabling the relative magnitude of PTI events to be gauged, which is expected to assist with the assessment of public health risks.

scholarly journals Gender Differences in Association between Air Pollution and Daily Mortality in the Capital of the Green Lungs of Poland–Population-Based Study with 2,953,000 Person-Years of Follow-Up

2020 ◽  
Vol 9 (8) ◽  
pp. 2351
Author(s):  
Łukasz Kuźma ◽  
Krzysztof Struniawski ◽  
Szymon Pogorzelski ◽  
Hanna Bachórzewska-Gajewska ◽  
Sławomir Dobrzycki
Keyword(s):  
Public Health ◽  
Gender Differences ◽  
Air Pollution ◽  
Air Quality ◽  
Air Pollutant ◽  
World Health ◽  
The European Union ◽  
Daily Mortality ◽  
Male Population ◽  
The Impact

(1) Introduction: air pollution is considered to be one of the main risk factors for public health. According to the European Environment Agency (EEA), air pollution contributes to the premature deaths of approximately 500,000 citizens of the European Union (EU), including almost 5000 inhabitants of Poland every year. (2) Purpose: to assess the gender differences in the impact of air pollution on the mortality in the population of the city of Bialystok—the capital of the Green Lungs of Poland. (3) Materials and Methods: based on the data from the Central Statistical Office, the number—and causes of death—of Białystok residents in the period 2008–2017 were analyzed. The study utilized the data recorded by the Provincial Inspectorate for Environmental Protection station and the Institute of Meteorology and Water Management during the analysis period. Time series regression with Poisson distribution was used in statistical analysis. (4) Results: A total of 34,005 deaths had been recorded, in which women accounted for 47.5%. The proportion of cardiovascular-related deaths was 48% (n = 16,370). An increase of SO2 concentration by 1-µg/m3 (relative risk (RR) 1.07, 95% confidence interval (CI) 1.02–1.12; p = 0.005) and a 10 °C decrease of temperature (RR 1.03, 95% CI 1.01–1.05; p = 0.005) were related to an increase in the number of daily deaths. No gender differences in the impact of air pollution on mortality were observed. In the analysis of the subgroup of cardiovascular deaths, the main pollutant that was found to have an effect on daily mortality was particulate matter with a diameter of 2.5 μm or less (PM2.5); the RR for 10-µg/m3 increase of PM2.5 was 1.07 (95% CI 1.02–1.12; p = 0.01), and this effect was noted only in the male population. (5) Conclusions: air quality and atmospheric conditions had an impact on the mortality of Bialystok residents. The main air pollutant that influenced the mortality rate was SO2, and there were no gender differences in the impact of this pollutant. In the male population, an increased exposure to PM2.5 concentration was associated with significantly higher cardiovascular mortality. These findings suggest that improving air quality, in particular, even with lower SO2 levels than currently allowed by the World Health Organization (WHO) guidelines, may benefit public health. Further studies on this topic are needed, but our results bring questions whether the recommendations concerning acceptable concentrations of air pollutants should be stricter, or is there a safe concentration of SO2 in the air at all.

scholarly journals Modelling and analysis of COVID-19 epidemic in India

2020 ◽  
Author(s):  
Alok Tiwari
Keyword(s):  
Public Health ◽  
Doubling Time ◽  
Single Case ◽  
World Health Organisation ◽  
Public Health Emergency ◽  
Positive Case ◽  
World Health ◽  
The Public ◽  
First Case ◽  
The World

ABSTRACTCOVID-19 epidemic is declared as the public health emergency of international concern by the World Health Organisation in the second week of March 2020. This disease originated from China in December 2019 has already caused havoc around the world, including India. The first case in India was reported on 30th January 2020, with the cases crossing 6000 on the day paper was written. Complete lockdown of the nation for 21 days and immediate isolation of infected cases are the proactive steps taken by the authorities. For a better understanding of the evolution of COVID-19 in the country, Susceptible-Infectious-Quarantined-Recovered (SIQR) model is used in this paper. It is predicted that actual infectious population is ten times the reported positive case (quarantined) in the country. Also, a single case can infect 1.55 more individuals of the population. Epidemic doubling time is estimated to be around 4.1 days. All indicators are compared with Brazil and Italy as well. SIQR model has also predicted that India will see the peak with 22,000 active cases during the last week of April followed by reduction in active cases. It may take complete July for India to get over with COVID-19.

scholarly journals The Impact of Covid-19 Public Health Policies on Persons with Disability and their Caregivers in Malta

2021 ◽  
Vol 4 (2) ◽  
pp. 25-37
Author(s):  
Andrew Camilleri ◽  
Samantha Pace Gasan ◽  
Andrew Azzopardi
Keyword(s):  
Public Health ◽  
World Health Organisation ◽  
World Health ◽  
Persons With Disabilities ◽  
Health Authorities ◽  
Essential Services ◽  
Public Health Authorities ◽  
Novel Coronavirus ◽  
Restrictive Measures ◽  
The Impact

On March 11, 2020, the World Health Organisation (WHO) declared a global health pandemic, due to the spread of a novel coronavirus, later named “Covid-19”. The spread of Covid-19 led to social isolation, distancing and a number of restrictive measures in Malta.  The aim of this paper is to analyse the impact of Covid-19 and the subsequent restrictive measures on persons with disability and their caregivers and families in Malta. Using thematic analysis, the study found that a variety of impacts ranging from a sense of isolation, lack of essential services being provided, additional difficulties encountered at the place of work and education and measures that were not sufficiently tailored for persons with disability issued by public health authorities. Underlying the additional difficulties brought about by Covid-19, structural difficulties to access essential services as well as ignorance from policy makers and politicians and the added “vulnerable-ization” of persons with disabilities were found to be highly impacting factors that pervade the experience of persons with disabilities and their caregivers.

COVID-19: Avoiding a second tragedy in a tuberculosis burdened country

2020 ◽  
Vol 90 (2) ◽  
Author(s):  
Siddharth Raj Yadav ◽  
Rohit Kumar ◽  
Nitesh Gupta ◽  
Pranav Ish ◽  
Shibdas Chakrabarti ◽  
...  
Keyword(s):  
Public Health ◽  
Human Immunodeficiency Virus ◽  
The Elderly ◽  
World Health Organisation ◽  
Public Health Emergency ◽  
World Health ◽  
Special Population ◽  
Global Public Health ◽  
Immunodeficiency Virus ◽  
The World

To the EditorNovel Coronavirus disease (COVID-19) was first notified in December 2019 from Wuhan, China. Now, it has spread rapidly and has been declared a pandemic affecting over 200 countries with widespread morbidity and mortality. It has been postulated that the most vulnerable population are the elderly, people living in crowded areas, children and immune-compromised individuals, such as people living with human immunodeficiency virus (HIV). The correlation of tuberculosis (TB), HIV and malnutrition are well documented and hence, people with tuberculosis should be considered as special population in this pandemic. TB is an ancient disease among humans recorded as far back as seventy thousand years which was declared a global public health emergency in 1993 by the World Health Organisation (WHO). India has the highest TB burden in the world.

scholarly journals Max Wilson and the Principles and Practice of Screening for Disease

2020 ◽  
Vol 6 (1) ◽  
pp. 15
Author(s):  
Kate Hall
Keyword(s):  
Public Health ◽  
International Society ◽  
Neonatal Screening ◽  
World Health Organisation ◽  
Population Screening ◽  
World Health ◽  
The World ◽  
The Hague ◽  
Opening Session

The name Wilson will be forever associated with co-author Jungner and ten principles of population screening published in 1968 by the World Health Organisation (WHO) as Public Health Papers No 34. These principles have since been used, modified or extended throughout much of Europe and beyond. Very little was known about Dr. J.M.G. Wilson and his life and how he came to write this monograph until the Silver Jubilee meeting of the International Society for Neonatal Screening held in The Hague in 2016. The opening session was chosen to be ‘The Wilson and Jungner criteria for screening for disease’.

scholarly journals SARS: current overview, aetiology and epidemiology

2003 ◽  
Vol 3 (2) ◽  
pp. 46-55
Author(s):  
Semra Čavaljuga ◽  
Michael Faulde ◽  
Jerrold J. Scharninghausen
Keyword(s):  
Public Health ◽  
World Health Organisation ◽  
The United States ◽  
Air Travel ◽  
World Health ◽  
New Disease ◽  
The Past ◽  
Health Authorities ◽  
The World ◽  
Public Health Authorities

At this moment, public health authorities, physicians and scientists around the world are struggling to cope with a severe and rapidly spreading new disease in humans called severe acute respiratory syndrome, or SARS. According to World Health Organisation (WHO) this appears to be the first severe and easily transmissible new disease to emerge in the 21st century. Though much about the disease remains poorly understood, including the details of the causative virus, we do know that it has features that allow it to spread rapidly along international air travel routes. As of 10 May 2003, a cumulative 7296 probable SARS cases with 526 deaths have been reported from 30 countries on three continents (WHO, ProMED). In the past week, more than 1000 new probable cases and 96 deaths were reported globally. This represents an increase of 119 new cases and 8 new deaths compared with 9 May 2003 (China (85), Taiwan (23), and Hong Kong (7) represented the overwhelming majority, with one additional case each reported from France, Malaysia, Singapore, and the United States). Only in China, as of 10 May 2003 (WHO) total of 4884 with 235 deaths have been reported. Some outbreaks have reassuring features.

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