Evaluation of emissions and air quality in megacities

Gurjar, Bhola R.; Butler, Tim; Lawrence, M. G.; Lelieveld, Jos

doi:10.1016/j.atmosenv.2007.10.048

Cited by 461 publications

(223 citation statements)

References 29 publications

Supporting

Mentioning

196

Contrasting

Unclassified

Order By: Relevance

“…Urban data vary from 1 ppb (Lompoc, USA) to 45 ppb (Dhaka, Bangladesh). Dhaka is the most polluted megacity with SO 2 (Gurjar et al 2008). The average concentration in Beirut for the whole period of measurement is 3.1 ppb.…”

Section: Periods and Sampling Sitesmentioning

confidence: 95%

“…Figure 1 shows the location of the experimental sites within Beirut. Gurjar et al (2008) a Out of 54 observations, sample sizes for different years were as follows: 1990 (n = 1), 1992-1994 (n = 3), 1995 (n = 7), 1998-1999 (n = 13), 2000-2001 (n = 30) (Gurjar et al 2008) relatively narrow range. Urban data vary from 1 ppb (Lompoc, USA) to 45 ppb (Dhaka, Bangladesh).…”

Section: Periods and Sampling Sitesmentioning

confidence: 99%

See 1 more Smart Citation

SO2 in Beirut: air quality implication and effects of local emissions and long-range transport

Afif

Chélala

Borbon

et al. 2008

Air Qual Atmos Health

View full text Add to dashboard Cite

While sulfur dioxide (SO 2 ) emissions have been dramatically restricted in the past few decades, some cities in developing countries still encounter high pollution levels. This makes it essential to implement an air quality monitoring network in these sensitive regions. Results from a program of measuring groundlevel concentration of SO 2 (from December 2004 till July 2006) at 22 curbside and background sites within the city of Beirut (Lebanon) are presented for the first time. Four-week sampling period measurements were made over 20 periods for all sites by passive sampling. Low SO 2 concentrations were observed (3.1 parts per billion on average for the whole period). This value is among the lowest observed in urban areas worldwide. Thus, Beirut is not polluted by SO 2 on an annual basis. Highest concentrations were measured in winter time, resulting from low height of the boundary layer and higher emissions of SO 2 (e.g., heating). Cluster analysis revealed two different SO 2 variation patterns over the city (high-and low-level patterns), highlighting the effects of local sources location and wind direction variability on SO 2 distribution. Analysis of seasonal variations pointed out a springtime SO 2 maximum in 2005. Beside local sources, long-range transport can account for an important source of SO 2 in Beirut, explaining around 50% of SO 2 levels within the city.

show abstract

Section: Periods and Sampling Sitesmentioning

confidence: 95%

Section: Periods and Sampling Sitesmentioning

confidence: 99%

SO2 in Beirut: air quality implication and effects of local emissions and long-range transport

Afif

Chélala

Borbon

et al. 2008

Air Qual Atmos Health

View full text Add to dashboard Cite

show abstract

“…129 A study to evaluate the emissions and air quality in megacities found Dhaka to have the poorest air quality in respect of total suspended particles (TSP), sulfur dioxide (SO 2 ), and nitrogen dioxide (NO 2 ) among the megacities, and the pollutant levels were far beyond the WHO standard. 130 One recent study involving Dhaka City found elevated concentrations of the number, surface and mass distributions of particulate matters; fine particles (0.5-1.0 µm) derived from vehicle emissions were dominating the aerosol particles number concentrations. 131 Investigation of sources of atmospheric aerosol at urban and semi-urban areas in Bangladesh revealed soil dust, road dust, cement, sea salt, motor vehicles and biomass burning to be the main sources of air pollution.…”

Section: Air Pollutionmentioning

confidence: 99%

Cardiovascular Disease in Bangladesh: A Review

2017

View full text Add to dashboard Cite

Abstract:Like elsewhere, cardiovascular disease (CVD) is an increasingly important cause of morbidity and mortality in Bangladesh. Over the past few decades, because of epidemiological transition, the prevailing disease pattern in this country changed from predominantly communicable to predominantly non-communicable disease, CVD contributes to the latter a lot. Actually, CVD particularly coronary artery disease (CAD) is getting epidemic proportion day by day. Hypertension and heart failure are on the rise, whereas the prevalence of acute rheumatic fever is declining. However, despite some efforts, reliable data concerning various aspects of CVD is inadequate at present. The current prevalence of hypertension, CAD, rheumatic fever and rheumatic heart disease and stroke may be 20-25%, 4-6%, <1/1000, 0.3-1.0% respectively. Besides conventional risk factors for different CVD, genetic predisposition and some novel issues like high salt intake, arsenicosis, hypovitaminosis D and air pollution may play important role in the aetiopathogenesis of CVD in this population. Formulation of appropriate policy and more emphasis on preventive strategy may help combat CVD in Bangladesh.

show abstract

“…Therefore, the study of surface ozone is important due to its long-term and short-term impacts on human health, well-being, vegetation and the environment when its exposure to the high ozone concentration [9,10,11]. Thus, to predict the ozone concentration, it is important to apply a model that describes the relationships within the ozone concentrations and many variables that cause its production.…”

Section: Introductionmentioning

confidence: 99%

Temporal Characterisation of Ground-level Ozone Concentration in Klang Valley

2018

View full text Add to dashboard Cite

Abstract. In Malaysia, ground-level ozone (O3) is one of the most significant air pollutants due to the increasing sources of ozone precursors. Hence, the surface O3 concentration should have received substantial attention because of its negative effects to human health, vegetation and the environment. In this study, hourly air pollutants dataset (i.e O3, Carbon monoxide (CO), Nitrogen dioxide (NO2), Particulate matter (PM10), Nonmethane hydrocarbon (NmHC), Sulphur dioxide (SO2)) and weather parameters (i.e. wind speed (WS), wind direction (WD), temperature (T), ultraviolet B (UVB)) for ten years period (2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012) in Klang Valley were selected for analysis in this study. Two monitoring stations were selected that are Petaling Jaya and Shah Alam. The aim of the study is to determine the diurnal variations of O3 concentrations according to the seasonal monsoon and the correlation between the ground-level O3 concentration and others parameter. A high concentration of ground-level O3 was observed during the first transition (April to May) for both of the stations. While at a low surface, O3 concentration was found out during the southwest monsoon within June to September. Pearson correlation was used to find the correlation between the O3 concentration and all other pollutants and weather parameters. Most of the relationship between O3concentrationswas positively correlated with NO2 and negative relationship was found out with NMHC. These results were expected since these pollutants are known as the O3 precursors. Besides that, O3 concentration and its precursors show a positive significant correlation with all meteorological factors except for relative humidity.

show abstract

Evaluation of emissions and air quality in megacities

Cited by 461 publications

References 29 publications

SO2 in Beirut: air quality implication and effects of local emissions and long-range transport

SO2 in Beirut: air quality implication and effects of local emissions and long-range transport

Cardiovascular Disease in Bangladesh: A Review

Temporal Characterisation of Ground-level Ozone Concentration in Klang Valley

Contact Info

Product

Resources

About