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https://www.readbyqxmd.com/read/29786584/effect-of-atmospheric-technogenic-emissions-on-health-indicators-of-child-population
#1
Olha M Toronchenko, Viktor I Bredun, Natalia O Smoliar
OBJECTIVE: Introduction:The identification of scientifically grounded dependency of the atmospheric pollution effect on the health level of the child population within particular area makes it possible to assess the degree of district environmental safety and provides the possibility for implementation of targeted programs and risk preventing strategies associated with atmospheric emissions. The aim of the study is to assess the dependence of child morbidity rate development caused by atmospheric chemical pollution, which resulted from the stationary and mobile sources activity in terms of the Poltava region (Ukraine) as a model...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29781219/disentangling-the-effects-of-acidic-air-pollution-atmospheric-co-2-and-climate-change-on-recent-growth-of-red-spruce-trees-in-the-central-appalachian-mountains
#2
Justin M Mathias, Richard B Thomas
In the 45 years after legislation of the Clean Air Act, there has been tremendous progress in reducing acidic air pollutants in the eastern United States, yet limited evidence exists that cleaner air has improved forest health. Here, we investigate the influence of recent environmental changes on the growth and physiology of red spruce (Picea rubens Sarg.) trees, a key indicator species of forest health, spanning three locations along a 100 km transect in the Central Appalachian Mountains. We incorporated a multiproxy approach using 75-year tree ring chronologies of basal tree growth, carbon isotope discrimination (∆13 C, a proxy for leaf gas exchange), and δ15 N (a proxy for ecosystem N status) to examine tree and ecosystem level responses to environmental change...
May 20, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29780668/impact-of-front-range-sources-on-reactive-nitrogen-concentrations-and-deposition-in-rocky-mountain-national-park
#3
Katherine B Benedict, Anthony J Prenni, Amy P Sullivan, Ashley R Evanoski-Cole, Emily V Fischer, Sara Callahan, Barkley C Sive, Yong Zhou, Bret A Schichtel, Jeffrey L Collett
Human influenced atmospheric reactive nitrogen (RN) is impacting ecosystems in Rocky Mountain National Park (ROMO). Due to ROMO's protected status as a Class 1 area, these changes are concerning, and improving our understanding of the contributions of different types of RN and their sources is important for reducing impacts in ROMO. In July-August 2014 the most comprehensive measurements (to date) of RN were made in ROMO during the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ). Measurements included peroxyacetyl nitrate (PAN), C1 -C5 alkyl nitrates, and high-time resolution NOx , NOy , and ammonia...
2018: PeerJ
https://www.readbyqxmd.com/read/29780445/a-comparison-of-simulated-and-field-derived-leaf-area-index-lai-and-canopy-height-values-from-four-forest-complexes-in-the-southeastern-usa
#4
John S Iiames, Ellen Cooter, Donna Schwede, Jimmy Williams
Vegetative leaf area is a critical input to models that simulate human and ecosystem exposure to atmospheric pollutants. Leaf area index (LAI) can be measured in the field or numerically simulated, but all contain some inherent uncertainty that is passed to the exposure assessments that use them. LAI estimates for minimally managed or natural forest stands can be particularly difficult to develop as a result of interspecies competition, age and spatial distribution. Satellite-based LAI estimates hold promise for retrospective analyses, but we must continue to rely on numerical models for alternative management analysis...
2018: Forests
https://www.readbyqxmd.com/read/29780271/development-and-evaluation-of-the-r-line-model-algorithms-to-account-for-chemical-transformation-in-the-near-road-environment
#5
Alejandro Valencia, Akula Venkatram, David Heist, David Carruthers, Saravanan Arunachalam
With increased urbanization, there is increased mobility leading to higher amount of traffic-related activity on a global scale. Most NOx from combustion sources (about 90-95%) are emitted as NO, which is then readily converted to NO2 in the ambient air, while the remainder is emitted largely as NO2 . Thus, the bulk of ambient NO2 is formed due to secondary production in the atmosphere, and which R-LINE cannot predict given that it can only model the dispersion of primary air pollutants. NO2 concentrations near major roads are appreciably higher than those measured at monitors in existing networks in urban areas, motivating a need to incorporate a mechanism in R-LINE to account for NO2 formation...
2018: Transportation Research. Part D, Transport and Environment
https://www.readbyqxmd.com/read/29780034/improving-predictive-asthma-algorithms-with-modelled-environment-data-for-scotland-an-observational-cohort-study-protocol
#6
Ireneous N Soyiri, Aziz Sheikh, Stefan Reis, Kimberly Kavanagh, Massimo Vieno, Tom Clemens, Edward J Carnell, Jiafeng Pan, Abby King, Rachel C Beck, Hester J T Ward, Chris Dibben, Chris Robertson, Colin R Simpson
INTRODUCTION: Asthma has a considerable, but potentially, avoidable burden on many populations globally. Scotland has some of the poorest health outcomes from asthma. Although ambient pollution, weather changes and sociodemographic factors have been associated with asthma attacks, it remains unclear whether modelled environment data and geospatial information can improve population-based asthma predictive algorithms. We aim to create the afferent loop of a national learning health system for asthma in Scotland...
May 20, 2018: BMJ Open
https://www.readbyqxmd.com/read/29779154/the-effect-of-meteorological-conditions-and-air-pollution-on-the-occurrence-of-type-a-and-b-acute-aortic-dissections
#7
Nan Xie, Liqun Zou, Lei Ye
To explore the association of weather conditions and air pollutants with incidence risk of acute aortic dissection (AAD), we included patients who consecutively admitted to the emergency units of our hospital for AAD between Dec. 1, 2013, and Apr. 30, 2017. Their medical records were reviewed. The meteorological data (daily precipitation, minimal and maximal temperatures, mean atmospheric pressure, relative humidity) and air pollutants values [air daily index (AQI), aerodynamic diameter of 2.5 mm or less (PM2...
May 19, 2018: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29778956/health-risk-assessment-of-heavy-metals-in-atmospheric-deposition-in-a-congested-city-environment-in-a-developing-country-kandy-city-sri-lanka
#8
Lakshika Weerasundara, D N Magana-Arachchi, Abdul M Ziyath, Ashantha Goonetilleke, Meththika Vithanage
This research study which was undertaken in a congested city environment in a developing country provides a robust approach for the assessment and management of human health risk associated with atmospheric heavy metals. The case study area was Kandy City, which is the second largest city in Sri Lanka and bears the characteristics of a typical city in the developing world such as the urban footprint, high population density and traffic congestion. Atmospheric deposition samples were collected on a weekly basis and analyzed for nine heavy metals common to urban environments, namely, Al, Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb...
May 17, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29778813/ozone-disrupts-adsorption-of-rhododendron-tomentosum-volatiles-to-neighbouring-plant-surfaces-but-does-not-disturb-herbivore-repellency
#9
Adedayo O Mofikoya, Minna Kivimäenpää, James D Blande, Jarmo K Holopainen
The perennial evergreen woody shrub, Rhododendron tomentosum, confers associational resistance against herbivory and oviposition on neighbouring plants through passive adsorption of some of its constitutively emitted volatile organic compounds (VOCs). The adsorption process is dependent on transport of VOCs in the air. In polluted atmospheres, the VOCs may be degraded and adsorption impeded. We studied the effect of elevated ozone regimes on the adsorption of R. tomentosum volatiles to white cabbage, Brassica oleracea, and the oviposition of the specialist herbivore Plutella xylostella on the exposed plants...
May 17, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29778407/the-current-status-of-coral-reefs-and-their-vulnerability-to-climate-change-and-multiple-human-stresses-in-the-comoros-archipelago-western-indian-ocean
#10
B Cowburn, M A Samoilys, D Obura
Coral bleaching and various human stressors have degraded the coral reefs of the Comoros Archipelago in the past 40 years and rising atmospheric CO2 levels are predicted to further impact marine habitats. The condition of reefs in the Comoros is poorly known; using SCUBA based methods we surveyed reef condition and resilience to bleaching at sites in Grande Comore and Mohéli in 2010 and 2016. The condition of reefs was highly variable, with a range in live coral cover between 6% and 60% and target fishery species biomass between 20 and 500 kg per ha...
May 16, 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29778176/a-comprehensive-classification-method-for-voc-emission-sources-to-tackle-air-pollution-based-on-voc-species-reactivity-and-emission-amounts
#11
Guohao Li, Wei Wei, Xia Shao, Lei Nie, Hailin Wang, Xiao Yan, Rui Zhang
In China, volatile organic compound (VOC) control directives have been continuously released and implemented for important sources and regions to tackle air pollution. The corresponding control requirements were based on VOC emission amounts (EA), but never considered the significant differentiation of VOC species in terms of atmospheric chemical reactivity. This will adversely influence the effect of VOC reduction on air quality improvement. Therefore, this study attempted to develop a comprehensive classification method for typical VOC sources in the Beijing-Tianjin-Hebei region (BTH), by combining the VOC emission amounts with the chemical reactivities of VOC species...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778056/one-century-sedimentary-record-of-heavy-metal-pollution-in-western-taihu-lake-china
#12
Yan Li, Shenglu Zhou, Qing Zhu, Baojie Li, Junxiao Wang, Chunhui Wang, Lian Chen, Shaohua Wu
Long-term trends of sediment compositions are important for assessing the impact of human activities on the sediment and protecting the sediment environment. In this study, based on the contents of heavy metals and the Pb isotope ratios in lake sediments, atmospheric dustfall and soil in Yixing, China, the representative heavy metals (Zn, Pb, Cr and Cd) in lake sediments from western Taihu Lake were studied. The evolution history of heavy metals in the local environment was constructed for the past 100 years...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29775945/greenhouse-gas-emissions-reduction-in-different-economic-sectors-mitigation-measures-health-co-benefits-knowledge-gaps-and-policy-implications
#13
REVIEW
Jinghong Gao, Hongli Hou, Yunkai Zhai, Alistair Woodward, Sotiris Vardoulakis, Sari Kovats, Paul Wilkinson, Liping Li, Xiaoqin Song, Lei Xu, Bohan Meng, Xiaobo Liu, Jun Wang, Jie Zhao, Qiyong Liu
To date, greenhouse gas (GHG) emissions, mitigation strategies and the accompanying health co-benefits in different economic sectors have not been fully investigated. The purpose of this paper is to review comprehensively the evidence on GHG mitigation measures and the related health co-benefits, identify knowledge gaps, and provide recommendations to promote further development and implementation of climate change response policies. Evidence on GHG emissions, abatement measures and related health co-benefits has been observed at regional, national and global levels, involving both low- and high-income societies...
May 15, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29775300/secondary-organic-aerosol-formation-from-ambient-air-at-an-urban-site-in-beijing-effects-of-oh-exposure-and-precursor-concentrations
#14
Jun Liu, Biwu Chu, Tianzeng Chen, Changgeng Liu, Ling Wang, Xiaolei Bao, Hong He
Secondary organic aerosol (SOA) is an important component of atmospheric fine particles (PM2.5 ), while the key factors controlling SOA formation in ambient air remain poorly understood. In this work, the SOA formation in Beijing urban ambient air was investigated using an oxidation flow reactor (OFR) with high concentrations of OH radicals. The SOA formation potential increased significantly with the increase of ambient PM2.5 concentration during the observation. The optimum ambient exposure time, which is the aging time equivalent to atmospheric oxidation (with similar OH exposure) associated with the peak SOA formation, varied between 2 to 4 days in this study...
May 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29773927/influence-of-meteorological-factors-on-the-level-and-characteristics-of-culturable-bacteria-in-the-air-in-gliwice-upper-silesia-poland
#15
Ewa Brągoszewska, Józef S Pastuszka
Numerous studies have focused on occupational and indoor environments because people spend more than 90% of their time in them. Nevertheless, air is the main source of bacteria in indoors, and outdoor exposure is also crucial. Worldwide studies have indicated that bacterial concentrations vary among different types of outdoor environments, with considerable seasonal variations as well. Conducting comprehensive monitoring of atmospheric aerosol concentrations is very important not only for environmental management but also for the assessment of the health impacts of air pollution...
2018: Aerobiologia
https://www.readbyqxmd.com/read/29766431/the-indoor-outdoor-characteristics-of-water-soluble-ion-in-pm-2-5-in-tianjin-wintertime
#16
Baoqing Wang, Honghong Niu, Bowei Liu, Xinxin Hu, Zihui Ren
The indoor and outdoor PM2.5 mass concentration, water-soluble ion by filter sampler was analyzed on December 3-21, 2015 during wintertime in Tianjin, China. The results indicate that high humidity conditions result in the accumulation of atmospheric pollutants and reduce atmosphere visibility. The I/O ratio for PM2.5 concentration in dormitory and lab are less than 1 in haze days. Indoor PM2.5 concentration increases rapidly with outdoor PM2.5 concentration increasing in haze days. The filtration factors of the dormitory and lab indicate nearly half of the outdoor PM2...
May 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29763861/source-discrimination-of-atmospheric-metal-deposition-by-multi-metal-isotopes-in-the-three-gorges-reservoir-region-china
#17
Jinling Liu, Xiangyang Bi, Fanglin Li, Pengcong Wang, Jin Wu
Concentrations of heavy metals, as well as isotopic compositions of mercury (Hg) and lead (Pb), in mosses (Bryum argenteum) from the Three Gorges Reservoir (TGR) region were investigated to decipher the sources of atmospheric metals in this region. Higher contents of metals (0.90 ± 0.65 mg/kg of Cd, 24.6 ± 27.4 mg/kg of Cu, and 36.1 ± 51.1 mg/kg of Pb) in the mosses from TGR were found compared with those from pollution-free regions. Principal component analysis (PCA) grouped the moss metals into four main components which were associated with both anthropogenic and natural sources...
May 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29760879/smell-the-change-on-the-potential-of-gas-chromatographic-ion-mobility-spectrometry-in-ecosystem-monitoring
#18
Wolfgang Vautz, Chandrasekhara Hariharan, Maximilian Weigend
Plant volatile organic compounds (pVOCs) are being recognized as an important factor in plant-environment interactions. Both the type and amount of the emissions appear to be heavily affected by climate change. A range of studies therefore has been directed toward understanding pVOC emissions, mostly under laboratory conditions (branch/leaf enclosure). However, there is a lack of rapid, sensitive, and selective analytical methods, and therefore, only little is known about VOC emissions under natural, outdoor conditions...
May 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29760088/lead-pollution-recorded-in-greenland-ice-indicates-european-emissions-tracked-plagues-wars-and-imperial-expansion-during-antiquity
#19
Joseph R McConnell, Andrew I Wilson, Andreas Stohl, Monica M Arienzo, Nathan J Chellman, Sabine Eckhardt, Elisabeth M Thompson, A Mark Pollard, Jørgen Peder Steffensen
Lead pollution in Arctic ice reflects midlatitude emissions from ancient lead-silver mining and smelting. The few reported measurements have been extrapolated to infer the performance of ancient economies, including comparisons of economic productivity and growth during the Roman Republican and Imperial periods. These studies were based on sparse sampling and inaccurate dating, limiting understanding of trends and specific linkages. Here we show, using a precisely dated record of estimated lead emissions between 1100 BCE and 800 CE derived from subannually resolved measurements in Greenland ice and detailed atmospheric transport modeling, that annual European lead emissions closely varied with historical events, including imperial expansion, wars, and major plagues...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29758884/the-impact-of-urban-open-space-and-lift-up-building-design-on-building-intake-fraction-and-daily-pollutant-exposure-in-idealized-urban-models
#20
Chenyuan Sha, Xuemei Wang, Yuanyuan Lin, Yifan Fan, Xi Chen, Jian Hang
Sustainable urban design is an effective way to improve urban ventilation and reduce vehicular pollutant exposure to urban residents. This paper investigated the impacts of urban open space and 'lift-up' building design on vehicular CO (carbon monoxide) exposure in typical three-dimensional (3D) urban canopy layer (UCL) models under neutral atmospheric conditions. The building intake fraction (IF) represents the fraction of total vehicular pollutant emissions inhaled by residents when they stay at home. The building daily CO exposure (Et ) means the extent of human beings' contact with CO within one day indoor at home...
August 15, 2018: Science of the Total Environment
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