Impacts on particles and ozone by transport processes recorded at urban and high-altitude monitoring stations

Nicolás, J.F.; Crespo, J.; Yubero, Eduardo; Soler, Rubén; Carratalá, Adoración; Mantilla, Enrique

doi:10.1016/j.scitotenv.2013.07.060

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…This is likely due to the reaction between O 3 and NO, released along with particles from the combustion of fireworks, during the transport of the pyrotechnic plume to the measurement site. Additionally, calcium-rich particles resuspended during the displays (Crespo et al, 2012) could catalyze the heterogeneous destruction of ozone in a similar way to that reported during Saharan dust intrusions (Bonasoni et al, 2004;Nicolás et al, 2014). So, although it is obvious from Fig.…”

Section: O 3 and Particlessupporting

confidence: 73%

Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays

Caballero

Galindo²,

Castañer³

et al. 2015

Aerosol Air Qual. Res.

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Real-time measurements of ozone, NO x , aerosols and radiation were performed very close to the launch area of high intensity pyrotechnic spectacles, the so-called Mascletàs, typical of celebrations in eastern Spain. During these events, a considerable number of spectators are potentially exposed to high concentrations of pollutants directly or indirectly produced by the ignition of thousands of firecrackers at ground-level. This work is focused on the mechanism of ozone formation throughout the Mascletàs. After the initial decrease in O 3 levels (minimum concentration < 10 µg m -3 ) due to the reaction with NO emitted by fireworks explosions, peak concentrations of up to ~150 µg m -3 were recorded, clearly indicating that ozone was generated during these events. The results suggest that UV light produced by fireworks displays photolyzes O 2 releasing O to form O 3 as in the stratosphere.

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Section: O 3 and Particlessupporting

confidence: 73%

Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays

Caballero

Galindo²,

Castañer³

et al. 2015

Aerosol Air Qual. Res.

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“…This result indicates that the altitude of the sampling point is enough to be considered sensitive to most of the SDE passing over the VC. For the study area, it has been reported that mountain stations are more affected by SDE than sites located at lower altitudes, due to the altitude of the Saharan dust transport (Nicolás et al, 2014). Nevertheless, this result should be taken with caution.…”

Section: Characterization Of Sdementioning

confidence: 82%

Saharan Dust Events over the Valencian Community (Eastern Iberian Peninsula): Synoptic Circulation Patterns and Contribution to PM10 Levels

Huerta-Viso

Crespo

Galindo

et al. 2020

Aerosol Air Qual. Res.

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This study assessed Saharan dust events (SDE) passing over the Valencian Community (VC; eastern Spain) during the period of 2014-2017 by investigating the following topics: a) the occurrence of SDE and their impact on PM 10 mass concentrations, b) the identification of the favorable synoptic patterns at 850 hPa associated with SDE via cluster analysis and c) the applicability of the gamma probability density function (PDF) in fitting the mass contributions of SDE. We determined that these events affect the VC on ~26% of the days of the year, thereby contributing 3.3 µg m-3 (~23%) to the average PM 10 concentration. Five circulation scenarios were identified. In Scenario 1 (17.4%), the transport of Saharan dust was due to the combination of a trough situated over the southwest of the Iberian Peninsula and a high-pressure system centered on western Algeria, Tunisia and eastern Libya. According to the PDF analysis, SDE characterized by this type of pattern were the most likely to substantially increase PM 10 mass concentrations. In Scenarios 3 (39.2%) and 5 (19.4%), which contributed to high concentrations of mineral dust in the VC, a high-pressure system was located over North Africa. Scenarios 1, 3 and 5 occurred more frequently during summer, especially Scenario 3 (69%). On the other hand, Scenarios 2 (16.2%) and 4 (7.2%), both characterized by a deep low over the west or northwest of the Iberian Peninsula, typically arose during spring and, to a lesser extent, winter. These two scenarios displayed a lower probability of elevating mineral dust levels in the study area.

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“…Both the physical integrity and the potential viability of the bacterial cells are preserved, as they are collected at freezing temperatures from within the snowpack. High-altitude locations above the influence of the planetary boundary layer are ideal for detecting deposited Sahara dust (SD) particles because the potential contamination from anthropogenically-derived aerosols after deposition is minimal (Griffiths et al, 2014 ; Nicolás et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Bacterial Composition and Survival on Sahara Dust Particles Transported to the European Alps

2015

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Deposition of Sahara dust (SD) particles is a frequent phenomenon in Europe, but little is known about the viability and composition of the bacterial community transported with SD. The goal of this study was to characterize SD-associated bacteria transported to the European Alps, deposited and entrapped in snow. During two distinct events in February and May 2014, SD particles were deposited and promptly covered by falling snow, thus preserving them in distinct ochre layers within the snowpack. In June 2014, we collected samples at different depths from a snow profile at the Jungfraujoch (Swiss Alps; 3621 m a.s.l.). After filtration, we performed various microbiological and physicochemical analyses of the snow and dust particles therein that originated in Algeria. Our results show that bacteria survive and are metabolically active after the transport to the European Alps. Using high throughput sequencing, we observed distinct differences in bacterial community composition and structure in SD-layers as compared to clean snow layers. Sporulating bacteria were not enriched in the SD-layers; however, phyla with low abundance such as Gemmatimonadetes and Deinococcus-Thermus appeared to be specific bio-indicators for SD. Since many members of these phyla are known to be adapted to arid oligotrophic environments and UV radiation, they are well suited to survive the harsh conditions of long-range airborne transport.

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Impacts on particles and ozone by transport processes recorded at urban and high-altitude monitoring stations

Cited by 12 publications

References 23 publications

Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays

Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays

Saharan Dust Events over the Valencian Community (Eastern Iberian Peninsula): Synoptic Circulation Patterns and Contribution to PM10 Levels

Bacterial Composition and Survival on Sahara Dust Particles Transported to the European Alps

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