The spatial–temporal distribution of the atmospheric polluting agents during the period 2000–2005 in the Urban Area of Guadalajara, Jalisco, Mexico

Sánchez, Hermes Ulises Ramírez; García, María Dolores Andrade; Bejarán, Rubén; Guadalupe, Mario; Vázquez, Antonio Wallo; Toledano, Ana C. Pompa; Villasenor, Odila de la Torre

doi:10.1016/j.jhazmat.2008.10.127

Cited by 20 publications

(14 citation statements)

References 13 publications

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“…In the rainy season, the pollutant concentrations were lower than those of both the dry and transition periods. The results agreed with many previous studies (Ramire Sanchez et al 2009;Ramire Sanchez et al 2009.…”

Section: Spatial and Temporal Variations Of Nitrogen Dioxide Concentrsupporting

confidence: 93%

Validation and field application of tailor-made nitrogen dioxide passive samplers

Bootdee

Chalemrom

Chantara

2012

Int. J. Environ. Sci. Technol.

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Section: Spatial and Temporal Variations Of Nitrogen Dioxide Concentrsupporting

confidence: 93%

Validation and field application of tailor-made nitrogen dioxide passive samplers

Bootdee

Chalemrom

Chantara

2012

Int. J. Environ. Sci. Technol.

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“…Furthermore, a series of regulations on the quality of petroleum products have been implemented (NOM-016-CRE-2016 is the most recent one), as well as immediate contingency plans and mandatory vehicle verification programs [31]. Also note that Figure 4b shows a definite trend of decrease in the PM 10 concentrations, contrary to what Sánchez et al [10] found for the period 2000-2005. Figure 4b shows is the peak of PM 10 concentrations reached during 2011.…”

Section: Temporal and Spatial Analysis Of Pm 10mentioning

confidence: 92%

“…The authors also recommended studying the synoptic patterns that most influenced the GMA in order to forecast episodes of high O 3 concentrations. Furthermore, Ramírez-Sánchez et al [10] used observation data between 2000-2005 of the criteria pollutants (CO, SO 2 , NO 2 , PM 10 , and O 3 ) to describe their spatio-temporal distribution. Here, only monthly averages were analyzed for the study period.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Pollution by PM10 and O3 in the Guadalajara Metropolitan Area, Mexico

et al. 2018

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To study the air quality in the Guadalajara Metropolitan Area (GMA), concentrations of suspended particles (PM 10) and ozone (O 3) reported by eight monitoring stations were analyzed. Also, six commonly found types of synoptic situations (TSS) during 1996-2016 were identified using an atmospheric pattern correlation method on the mean sea level pressure and geopotential heights (850 hPa, 500 hPa, and 200 hPa) of fields given by the North American Regional Reanalysis (NARR) database. Overall, 75% of the period of study was classified as one of the six TSS. Afterward, statistical significance tests (confidence level 95%) were applied to determine whether the TSS affected PM 10 and O 3 concentrations locally in the GMA. PM 10 maximum hourly concentrations (~76.7 µg/m 3) occurred around 8 am local time, while that of ozone (~0.054 ppm) occurred between 1-4 pm local time. Meanwhile, PM 10 monthly levels were higher between December and May, and the highest O 3 concentrations occurred between April and June. Average annual levels of PM 10 have decreased through the years, while the annual trend of mean O 3 concentrations seemed to respond to the 11-year solar cycle. It was also found that during "convective-allowing situations" (TSS VI) and "thermal low over California" (TSS I), PM 10 concentrations remained low in the GMA, and O 3 concentrations rose under the influence of a "low-pressure system over the United States (USA)" (TSS II). Further research is suggested to address the effect of the local circulation in the GMA linked to the TSS on O 3 and PM 10 concentrations.

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“…It has a population of around 5 million inhabitants [36], and a vehicle fleet of around 2.1 million vehicles that contribute with 80% and 70% of total oxides of nitrogen (NO X ) and volatile organic compounds (VOCs) emissions within the GMA [37]. It is located in a semi-closed valley with prevailing calm winds and recurrent thermal inversions, approximately 283 days of the year [38]. Anti-cyclonic systems generated in the Gulf of Mexico and the Pacific Ocean may cause recurrently atmospheric stability and prevent vertical mixing.…”

Section: Study Areamentioning

confidence: 99%

Observed Daily Profiles of Polyaromatic Hydrocarbons and Quinones in the Gas and PM1 Phases: Sources and Secondary Production in a Metropolitan Area of Mexico

et al. 2019

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The diel variation of meteorological conditions strongly influences the formation processes of secondary air pollutants. However, due to the complexity of sampling highly reactive chemical compounds, significant information about their transformation and source can be lost when sampling over long periods, affecting the representativeness of the samples. In order to determine the contribution of primary and secondary sources to ambient levels of polyaromatic hydrocarbons (PAHs) and quinones, measurements of gas and PM1 phases were conducted at an urban site in the Guadalajara Metropolitan Area (GMA) using a 4-h sampling protocol. The relation between PAHs, quinones, criteria pollutants, and meteorology was also addressed using statistical analyses. Total PAHs (gas phase + PM1 phase) ambient levels ranged between 184.03 ng m−3 from 19:00 to 23:00 h and 607.90 ng m−3 from 07:00 to 11:00 h. These figures both coincide with the highest vehicular activity peak in the morning and at night near the sampling site, highlighting the dominant role of vehicular emissions on PAHs levels. For the gas phase, PAHs ranged from 177.59 to 595.03 ng m−3, while for PM1, they ranged between 4.81 and 17.44 ng m−3. The distribution of the different PAHs compounds between the gas and PM1 phases was consistent with their vapour pressure (p °L) reported in the literature, the PAHs with vapour pressure ≤ 1 × 10−3 Pa were partitioned to the PM1, and PAHs with vapour pressures ≥ 1 × 10−3 Pa were partitioned to the gas phase. PAHs diagnostic ratios confirmed an anthropogenic emission source, suggesting that incomplete gasoline and diesel combustion from motor vehicles represent the major share of primary emissions. Quinones ambient levels ranged between 18.02 ng m−3 at 19:00–23:00 h and 48.78 ng m−3 at 15:00–19:00 h, with significant increases during the daytime. The distribution of quinone species with vapour pressures (p °L) below 1 × 10−4 Pa were primarily partitioned to the PM1, and quinones with vapour pressures above 1 × 10−4 Pa were mainly partitioned to the gas phase. The analysis of the distribution of phases in quinones suggested emissions from primary sources and their consequent degradation in the gas phase, while quinones in PM1 showed mainly secondary formation modulated by UV, temperature, O3, and wind speed. The sampling protocol proposed in this study allowed obtaining detailed information on PAHs and quinone sources and their secondary processing to be compared to existing studies within the GMA.

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The spatial–temporal distribution of the atmospheric polluting agents during the period 2000–2005 in the Urban Area of Guadalajara, Jalisco, Mexico

Cited by 20 publications

References 13 publications

Validation and field application of tailor-made nitrogen dioxide passive samplers

Validation and field application of tailor-made nitrogen dioxide passive samplers

Atmospheric Pollution by PM10 and O3 in the Guadalajara Metropolitan Area, Mexico

Observed Daily Profiles of Polyaromatic Hydrocarbons and Quinones in the Gas and PM1 Phases: Sources and Secondary Production in a Metropolitan Area of Mexico

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