Diurnal and seasonal variations of carbonyls and their effect on ozone concentrations in the atmosphere of Monterrey, Mexico

Menchaca-Torre, H. Lizette; Mercado-Hernández, Roberto; Rodríguez‐Rodríguez, José; Mendoza, Alberto

doi:10.1080/10962247.2015.1005849

Cited by 25 publications

(11 citation statements)

References 31 publications

(43 reference statements)

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“…Formaldehyde showed a clear diurnal pattern with the highest mean concentrations during the morning sampling period (10.33 µg m −3 over in all climatic seasons). This behavior is in agreement with that reported by Menchaca-Torre et al [43] and Facundo-Torres et al [44] who found higher levels of formaldehyde during the morning in a location near the Metropolitan Area of Monterey. This can be explained by vehicular emissions, since the morning (B1) sampling period coincides with rush hour.…”

Section: Results For C 1 -C 2 Carbonylssupporting

confidence: 83%

“…Acetaldehyde is associated with other sources beyond vehicular traffic emissions, including restaurant emissions, area sources, and stationary emissions [62]. Comparing our results for formaldehyde/acetaldehyde ratio with those reported for other large cities around the world, we found that Beijing, China (Pang and Mu) [63] and Monterrey, Mexico (Menchaca-Torre et al) [43] showed similar formaldehyde/acetaldehyde ratios: 2.7-3.9 and 0.86-1.94, respectively. These values are characteristic of urban areas.…”

Section: Formaldehyde/acetaldehyde Ratiossupporting

confidence: 59%

“…In addition the seasonal variation of air temperature and solar radiation are similar to that found here, causing that photochemical activity to be important in the partition of primary and secondary pollutants in the atmosphere. The location of the present study site is similar to the sampling sites in Beijing [63] and Monterrey [43], being surrounded by main streets; thus, vehicular emissions are among the main anthropogenic carbonyls sources.…”

Section: Formaldehyde/acetaldehyde Ratiosmentioning

confidence: 70%

“…Variations in VOCs with respect to wind direction have been studied in areas with industrial activity [43,52,53]. Meteorological conditions and criteria air pollutant concentrations (CO, NO, NO 2 , NO x , O 3 , and SO 2 ) observed during the sampling campaigns are presented in Table 3.…”

Section: Meteorological Influencementioning

confidence: 99%

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Atmospheric Levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, Mexico: Source Implications and Health Risk

Bretón

Kahl

et al. 2017

Atmosphere

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Atmospheric benzene and carbonyls were studied in San Nicolas de los Garza, Nuevo Leon, during 2011 and 2012. The relative abundance for measured VOCs was the following: formaldehyde (9.06 µg m −3 ) > acetaldehyde (8.06 µg m −3 ) > benzene (0.65 µg m −3 ). All measured VOCs had a clear seasonal trend with higher values of concentration during summer. Benzene and formaldehyde had a marked diurnal trend with the highest levels during morning, whereas acetaldehyde did not show a clear diurnal pattern. Meteorological analysis showed that the dominant winds came from NNE and ENE, suggesting that sources located in these directions contribute to the VOC levels. Principal component analysis (PCA) analysis revealed that photochemical activity influenced benzene and carbonyl levels during summer and that benzene was associated with vehicular traffic emissions during autumn and winter, showing good correlation with CO. Meteorological data showed that measured VOCs were influenced by regional sources. A health risk assessment showed that local exposure to carbonyls and benzene exceeded 1 × 10 −6 for integrated lifetime cancer risk. People living in San Nicolas de los Garza, thus, have a probable risk of suffering cancer in their lifetime. It is, therefore, necessary to improve environmental policies for controlling VOC levels in this area.

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Section: Results For C 1 -C 2 Carbonylssupporting

confidence: 83%

Section: Formaldehyde/acetaldehyde Ratiossupporting

confidence: 59%

Section: Formaldehyde/acetaldehyde Ratiosmentioning

confidence: 70%

Section: Meteorological Influencementioning

confidence: 99%

See 2 more Smart Citations

Atmospheric Levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, Mexico: Source Implications and Health Risk

Bretón

Kahl

et al. 2017

Atmosphere

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“…SIMA 1-h averages of CO, NO, NO 2 , O 3 and SO 2 , together with 4-h average diurnal data for reactive hydrocarbons (RHCs), ketone, formaldehyde, acetaldehyde and isoprene data were used to constrain the model. The average RHC and individual VOC species data were obtained during sampling campaigns carried out within the MMA in the spring and fall of 2011 and 2012 [40,41]. Additionally, the CIT model was modified to include speciated NO z (NO y -NO x ) data in the initial conditions, which was calculated from NO x and NO y measurements made at the OBI site.…”

Section: Box Model Description and Simulationsmentioning

confidence: 99%

Use of Combined Observational- and Model-Derived Photochemical Indicators to Assess the O3-NOx-VOC System Sensitivity in Urban Areas

2017

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Tropospheric levels of O 3 have historically exceeded the official annual Mexican standards within the Monterrey Metropolitan Area (MMA) in NE Mexico. High-frequency and high-precision measurements of tropospheric O 3 , NO y , NO 2 , NO, CO, SO 2 , PM 10 and PM 2.5 were made at the Obispado monitoring site near the downtown MMA from September 2012 to August 2013. The seasonal cycles of O 3 and NO y are driven by changes in meteorology and to a lesser extent by variations in primary emissions. The NO y levels were positively correlated with O 3 precursors and inversely correlated with O 3 and wind speed. Recorded data were used to assess the O 3 -Volatile Organic Compounds (VOC)-NO x system's sensitivity through an observational-based approach. The photochemical indicator O 3 /NO y was derived from measured data during the enhanced O 3 production period (12:00-18:00 Central Daylight Time (CDT), GMT-0500). The O 3 /NO y ratios calculated for this time period showed that the O 3 production within the MMA is VOC sensitive. A box model simulation of production rates of HNO 3 (P HNO3 ) and total peroxides (P perox ) carried out for O 3 episodes in fall and spring confirmed the VOC sensitivity within the MMA environment. No significant differences were observed in O 3 /NO y from weekdays to weekends or for P HNO3 /P perox ratios, confirming the limiting role of VOCs in O 3 production within the MMA. The ratified photochemical regime observed may allow the environmental authorities to revise and verify the current policies for air quality control within the MMA.

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Profiles and Source Apportionment of Nonmethane Volatile Organic Compounds in Winter and Summer in Xi’an, China, based on the Hybrid Environmental Receptor Model

et al. 2020

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Diurnal and seasonal variations of carbonyls and their effect on ozone concentrations in the atmosphere of Monterrey, Mexico

Cited by 25 publications

References 31 publications

Atmospheric Levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, Mexico: Source Implications and Health Risk

Atmospheric Levels of Benzene and C1-C2 Carbonyls in San Nicolas de los Garza, Nuevo Leon, Mexico: Source Implications and Health Risk

Use of Combined Observational- and Model-Derived Photochemical Indicators to Assess the O3-NOx-VOC System Sensitivity in Urban Areas

Profiles and Source Apportionment of Nonmethane Volatile Organic Compounds in Winter and Summer in Xi’an, China, based on the Hybrid Environmental Receptor Model

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