scholarly journals Ground-level Concentration of Ozone in Ambient Air in Chittagong (Bangladesh) City

2012 ◽  
Vol 47 (1) ◽  
pp. 83-88
Author(s):  
BA Begum ◽  
G Saroar ◽  
M Nasiruddin ◽  
SK Biswas
Keyword(s):  
Wind Speed ◽  
Ozone Concentration ◽  
Ground Level ◽  
Ambient Air ◽  
Quality Standard ◽  
Annual Average ◽  
Ground Level Ozone ◽  
Low Wind Speed ◽  
Ground Level Concentration ◽  
Ambient Air Quality Standard

The distribution of the ground-level ozone concentration in Chittagong city was continuously monitored at air monitoring station in Chittagong city during period of December 2006 to December 2007. The results of this study have revealed that the ground-level ozone concentration in Chittagong city varied from season to season. The highest ground-level ozone concentration was found in winter. The groundlevel ozone concentration has also a clear diurnal cycle - with higher values in the daytime and notably becomes zero at night depending on season. Meteorological conditions are known to influence the formation and dispersion of ground-level ozone concentration. At temperature lower than 20°C, the concentration of ozone becomes high where as at high temperature (> 30°C), the concentration becomes low. It has also been found that at low wind speed, the ozone concentration is high and at high wind speed, the concentration becomes low due to dispersion. The results also establish that the during the study periods, the ozone concentration was below the Bangladesh National Ambient Air Quality Standard (BNAAQS) of 80 ppb (annual average). DOI: http://dx.doi.org/10.3329/bjsir.v47i1.10729 Bangladesh J. Sci. Ind. Res. 47(1), 83-88, 2012

Regulating Transportation in New Nonattainment Areas Under the 8-Hour Ozone Standard

2003 ◽  
Vol 1842 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Jonathan Makler ◽  
Arnold M. Howitt
Keyword(s):  
North Carolina ◽  
Environmental Protection Agency ◽  
Ground Level ◽  
Ambient Air ◽  
Quality Standard ◽  
Ground Level Ozone ◽  
History Of ◽  
Ambient Air Quality Standard ◽  
Institutional Challenges ◽  
Transportation Agencies

The U.S. Environmental Protection Agency promulgated a new National Ambient Air Quality Standard for ground-level ozone in July 1997, beginning a process that (after some litigation-induced delays) will soon lead to the designation of new nonattainment areas that will be subject to the transportation conformity regulations. The history of the 8-h ozone standard is reviewed, the process of designating the boundaries of new nonattainment areas is described, and the types and geographic locations of the new nonattainment areas are suggested. Drawing on previous research, the institutional challenges that will face the new and expanded nonattainment areas are explored. The experiences of Georgia, North Carolina, and Oklahoma in preparing for implementation of the new standard are presented. Finally, several recommendations for transportation agencies involved in implementing the new standards are given.

scholarly journals The ground-level ozone concentration is inversely correlated with the number of COVID-19 cases in Warsaw, Poland

2021 ◽  
Author(s):  
Oskar Wiśniewski ◽  
Wiesław Kozak ◽  
Maciej Wiśniewski
Keyword(s):  
Wind Speed ◽  
Ozone Concentration ◽  
Inverse Correlation ◽  
Ground Level ◽  
Viral Agent ◽  
The Novel ◽  
Weather Factors ◽  
Ground Level Ozone ◽  
The Many ◽  
The Impact

AbstractCOVID-19, which is a consequence of infection with the novel viral agent SARS-CoV-2, first identified in China (Hubei Province), has been declared a pandemic by the WHO. As of September 10, 2020, over 70,000 cases and over 2000 deaths have been recorded in Poland. Of the many factors contributing to the level of transmission of the virus, the weather appears to be significant. In this work, we analyze the impact of weather factors such as temperature, relative humidity, wind speed, and ground-level ozone concentration on the number of COVID-19 cases in Warsaw, Poland. The obtained results show an inverse correlation between ground-level ozone concentration and the daily number of COVID-19 cases.

scholarly journals Winter Ozone Pollution in Utah’s Uinta Basin is Attenuating

Atmosphere ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 4
Author(s):  
Marc L. Mansfield ◽  
Seth N. Lyman
Keyword(s):  
Ground Level ◽  
Ambient Air ◽  
Quality Standard ◽  
Ozone Pollution ◽  
Uinta Basin ◽  
Concentration Data ◽  
Previous Decade ◽  
High Concentrations ◽  
Ambient Air Quality Standard ◽  
Ozone Precursor

High concentrations of ground-level ozone have been observed during wintertime in the Uinta Basin of western Utah, USA, beginning in 2010. We analyze existing ozone and ozone precursor concentration data from 38 sites over 11 winter seasons and conclude that there has been a statistically significant (p < 0.02) decline in ozone concentration over the previous decade. Daily exceedances of the National Ambient Air Quality Standard for ozone (70 ppb) have been trending downward at the rate of nearly four per year. Ozone and NOx concentrations have been trending downward at the rates of about 3 and 0.3 ppb per year, respectively. Concentrations of organics in 2018 were at about 30% of their values in 2012 or 2013. Several markers, annual ozone exceedance counts and median ozone and NOx concentrations, were at their largest values in the period 2010 to 2013 and have never recovered since then. We attribute the decline to (1) weakening global demand for oil and natural gas and (2) more stringent pollution regulations and controls, both of which have occurred over the previous decade. We also see evidence of ozone titration when snow cover is absent.

The Concentration Characteristics of PM10 and PM2.5 in Eight Cities of China in March, 2013

2013 ◽  
Vol 807-809 ◽  
pp. 20-23 ◽  
Author(s):  
Tao Sheng ◽  
Jian Wu Shi ◽  
Sen Lin Tian ◽  
Li Mei Bi ◽  
Hao Deng ◽  
...  
Keyword(s):  
Air Quality ◽  
Wind Speed ◽  
Relative Humidity ◽  
Negative Correlation ◽  
Ambient Air ◽  
Quality Standard ◽  
Meteorological Factor ◽  
Urban Air ◽  
Ambient Air Quality ◽  
Ambient Air Quality Standard

According to the information of air quality which published by the urban air quality real-time publishing platform, the concentration characteristics of PM10 and PM2.5 were studied in Kunming (KM), Changsha (CS), Hangzhou (HZ), Shanghai (SH), Harbin (HEB), Beijing (BJ), Wuhan (WH) and Guangzhou (GZ). The results show that the concentrations of PM10 and PM2.5 exceeded the Ambient Air Quality Standard (GB3095-2012) in varying degrees in March, 2013. The concentrations of PM10 in Wuhan is the highest, reached 164μg/m3, exceeded the standard by 9.3%; the concentrations of PM2.5 is much higher in Wuhan, Changsha and Beijing, the average concentrations were 96μg/m3, 103μg/m3 and 110μg/m3, exceeded the standard by 28.0%, 37.3% and 46.7% respectively. The correlation of PM10 with PM2.5 in most of these cities was good in March. The correlation analysis of pollutant with meteorological factor in Hangzhou, Shanghai, Beijing and Guangzhou was also studied, the results show that the concentrations of PM10 and PM2.5 are weakly positive correlation with temperature in the four cities, negative correlation with relative humidity without Beijing, and negative correlation with wind speed.

scholarly journals Urban Atmospheric 14CO and 14CH4 Measurements by Accelerator Mass Spectrometry

Radiocarbon ◽  
1986 ◽  
Vol 28 (2A) ◽  
pp. 625-633 ◽  
Author(s):  
G A Klouda ◽  
L A Currie ◽  
D J Donahue ◽  
A J T Jull ◽  
M H Naylor
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Stratospheric Ozone ◽  
Ground Level ◽  
Ambient Air ◽  
Quality Standard ◽  
Common Source ◽  
Combustion Emissions ◽  
Ambient Air Quality Standard ◽  
Atmospheric 14Co

Atmospheric gas samples (0.1m3) were collected at ground level during January/February 1984 in Las Vegas, Nevada for 14C/13C accelerator mass spectrometry and total abundance measurements of CO and CH4. During winter months in this locale, CO concentrations can occur at 10 to 100 times background, occasionally exceeding the National Ambient Air Quality Standard (NAAQS). Methane concentrations show a slight enhancement (∼24%) above the background (non-urban troposphere) level. A comparison of CO and CH4 concentrations shows a good linear correlation which may indicate a common source. Preliminary 14C/13C results of the two species suggest that fossil emissions are the predominant source of excess CO and CH4 in the samples taken. Estimates of anthropogenic CO and CH4 are important for source apportionment of combustion emissions. In addition, this information is valuable for understanding the global CO and CH4 cycles and, therefore, human impact on climate and the stratospheric ozone layer.

scholarly journals The ground level ozone concentration is inversely correlated with the number of COVID-19 cases in Warsaw, Poland

2020 ◽  
Author(s):  
Oskar Wisniewski ◽  
Wieslaw Kozak ◽  
Maciej Wisniewski
Keyword(s):  
Wind Speed ◽  
Ozone Concentration ◽  
Inverse Correlation ◽  
Ground Level ◽  
Viral Agent ◽  
The Novel ◽  
Weather Factors ◽  
Ground Level Ozone ◽  
The Many ◽  
The Impact

COVID-19, which is a consequence of infection with the novel viral agent SARS-CoV-2, first identified in China (Hubei Province), has been declared a pandemic by the WHO. As of September 10, 2020, over 70,000 cases and over 2,000 deaths have been recorded in Poland. Of the many factors contributing to the level of transmission of the virus, the weather appears to be significant. In this work we analyse the impact of weather factors such as temperature, relative humidity, wind speed and ground level ozone concentration on the number of COVID-19 cases in Warsaw, Poland. The obtained results show an inverse correlation between ground level ozone concentration and the daily number of COVID-19 cases.

The Variety of SO2、NO2 ,Air Pollutants Concentration of Nanchong City in Recent 16 Years

2014 ◽  
Vol 955-959 ◽  
pp. 2501-2504
Author(s):  
Tie Song Li ◽  
Cheng Ming Li ◽  
Guang Qian Ren
Keyword(s):  
Air Pollutants ◽  
Mass Concentration ◽  
Quality Evaluation ◽  
Annual Variation ◽  
Ambient Air ◽  
Quality Standard ◽  
Ambient Air Quality ◽  
Annual Average ◽  
Variation Characteristics ◽  
Ambient Air Quality Standard

Based on air monitoring data during 1996-2011 in Nanchong city,analysis of atmospheric SO2、NO2 annual variation characteristics and laws, and quality evaluation. The results show that: the concentration of SO2 decreased, and the small fluctuations in the range of SO2 concentrations in recent 16 years of Nanchong City. Annual average of mass concentration of SO2 more than 0.1 mg / m3 in 1996-2000, and not more than second level of "ambient air quality standard" GB3095-2012 in 2001-1011.The concentration of NO2 fluctuated between 0.034 mg / m3 and 0.056 mg / m3 in 1996-2001, and are less than 0.040 mg / m3 2002-2011.In the all, pollution of SO2、NO2 are reduced significantly through the treatment.

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