20 hasil untuk "Stuart Piketh"
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Artikel Jurnal
An assessment of the atmospheric nitrogen budget on the South African Highveld
Atmospheric reactive nitrogen concentrations on the South African Highveld have become a growing concern, with satellite images indicating very high nitrogen dioxide (NO2) concentrations in the region. This study investigated the nitrogen budget on the Highveld through the analysis of the…
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Artikel Jurnal
Analysing seasonal rainfall trends in the Cuvelai-Etosha Basin 1968–2018
This research used descriptive statistics to analyse rainfall trends in the Cuvelai- Etosha Basin (Namibia) over a 50-year historical period (1968 to 2018). The results revealed that rainfall fell over a period of 6 months between the months of November and April. Rainfall amounts were also…
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Artikel Jurnal Teks lengkap
Variation of Indoor Particulate Matter Concentrations and Association with Indoor/Outdoor Temperature: A Case Study in Rural Limpopo, South Africa
There is still a pressing concern regarding the causes of poor indoor air quality and the consequent effects on health, because people spend a considerable amount of time indoors. Information about seasonal variation and the determinants of particulate matter (PM) concentrations could guide the…
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Artikel Jurnal
A perspective on South African coal fired power station emissions
This paper investigates trends of historical and projected future South African coal-fired power station criteria (total primary Particulate Matter (PM), Sulphur Dioxide (SO2) and Nitrogen Oxides (NOx)) and Carbon Dioxide (CO2) emissions. It was found that an energy restricted environment has an…
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Artikel Jurnal
A historical perspective on the prevalence, distribution and influence of African Horse Sickness in Namibia
African Horse Sickness (AHS) is a devastating, non-contagious, infectious, insect-borne disease of equids. AHS is endemic to sub-Saharan Africa. Culicoides midges (Diptera: Ceratopogonidae) act as vectors for the transmission of the causative agent, African Horse Sickness virus (AHSV). It is…
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Artikel Jurnal
Atmospheric dry and wet deposition of sulphur and nitrogen species and assessment of critical loads of acidic deposition exceedance in South Africa
We tested the hypothesis that acidic atmospheric pollution deposition, originating from the South African central industrial area, poses an environmental threat across a larger region within the dispersal footprint. A network of 37 passive monitoring sites to measure SO2 and NO2 was operated from…
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Artikel Jurnal Teks lengkap
Aspects of Pollution in Gdansk and Gdynia Harbours at the Coastal Zone of the South Baltic Sea
Organotin compounds (OTC), as well as metals, are toxic to many organisms. Even at very low concentrations OTC and metals can have several negative effects. The paper discusses key issues relating to the location of harbours in the coastal zone (including near the river mouths and semi-closed…
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Artikel Jurnal
The influence of particle size on the thermal performance of coal and its derived char in a Union stove
For low-income communities in South Africa, coal is the most common solid fuel which is burnt in a variety of devices, including imbaulas and cast-iron stoves. The present work was conducted with the aim of determining the effect of the fuel particle size on the performance of coal, typically…
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Artikel Jurnal
The effect of particle size on the pollution reduction potential of a South African coal-derived low-smoke fuel
The coal combustion in cast-iron stoves leads to health hazards and air pollution. In this study the CO, SO2, NOx, PM and VOC emission concentrations were measured whilst combusting four fuel particle sizes (15, 20, 30, and 40 mm) as well as a composite of the sizes (all pre-devolatilized at a…
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Artikel Jurnal
Global Statement on Air Pollution and Health: Opportunities for Africa
The editorial speaks to the Global Statement on Air Pollution and Health and How it may assist African countries to eliminate air pollution-related health impacts.
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Artikel Jurnal Teks lengkap
Aerosol Optical Properties and Types over Southern Africa and Reunion Island Determined from Ground-Based and Satellite Observations over a 13-Year Period (2008–2021)
Fires occur seasonally in Southern Africa, from June to November, increasing tropospheric aerosol loading and triggering harmful consequences for the environment and human health. This study aims to examine 13 years of aerosol optical characteristics and types over Southern Africa and Reunion…
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Artikel Jurnal
Incidence and transmission of respiratory syncytial virus in urban and rural South Africa, 2017-2018
Abstract Data on respiratory syncytial virus (RSV) incidence and household transmission are limited. To describe RSV incidence and transmission, we conducted a prospective cohort study in rural and urban communities in South Africa over two seasons during 2017-2018. Nasopharyngeal swabs were…
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Artikel Jurnal
Exposure to outdoor aerospora and associated respiratory health risks among adults in Potchefstroom, North-West province, South Africa
BackgroundData on allergic rhinitis and respiratory health metrics are limited for South Africa, with grass pollen as a key outdoor aeroallergen. Exotic trees such as plane trees and ragweed produce highly allergenic pollen, dominating indigenous trees and weeds. Pollen allergy prevalence data is…
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Artikel Jurnal
Asymptomatic transmission and high community burden of seasonal influenza in an urban and a rural community in South Africa, 2017–18 (PHIRST): a population cohort study
Summary: Background: Data on influenza community burden and transmission are important to plan interventions especially in resource-limited settings. However, data are limited, particularly from low-income and middle-income countries. We aimed to evaluate the community burden and transmission of…
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Artikel Jurnal
An overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project: aerosol–cloud–radiation interactions in the southeast Atlantic basin
Southern Africa produces almost a third of the Earth's biomass burning (BB) aerosol particles, yet the fate of these particles and their influence on regional and global climate is poorly understood. ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) is a 5-year NASA EVS-2…
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Artikel Jurnal
A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions
This global study, which has been coordinated by the World Meteorological Organization Global Atmospheric Watch (WMO/GAW) programme, aims to understand the behaviour of key air pollutant species during the COVID-19 pandemic period of exceptionally low emissions across the globe. We investigated the…