Vertical distribution of PM2.5 in Santiago de Chile studied with an unmanned aerial vehicle and dispersion modelling

Olivares, I.; Langner, J.; Soto, C.; Monroy-Sahade, E.A.; Espinosa-Calderón, A.; Pérez, P.; Rubio, M.A.; Arellano, A.; Gramsch, E.

doi:10.1016/j.atmosenv.2023.119947

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…The vertical O 3 concentration showed a predominant tendency to increase with increasing altitude. These results are consistent with the results of previous studies such as Chen et al [32], Olivares et al [33], Li et al [34], and Samad et al [35]. This can be due to the higher ultraviolet radiation at upper altitudes, which promotes the photochemical production of O 3 [36][37][38][39] or due to the O 3 titration by NO near the surface [40,41].…”

Section: Discussionsupporting

confidence: 92%

Vertical Profiles of PM2.5 and O3 Measured Using an Unmanned Aerial Vehicle (UAV) and Their Relationships with Synoptic- and Local-Scale Air Movements

Hwang,

Lee,

Shin

et al. 2024

Remote Sensing

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The vertical air pollutant concentrations and their relationships with synoptic- and local-scale air movement have been studied. This study measured the vertical profiles of PM2.5 and O3 using an unmanned aerial vehicle during summer in South Korea and analyzed the characteristics of the measured profiles. To understand the impact of synoptic air movements, we generated and categorized the 48 h air trajectories based on HYSPLIT, and we analyzed how the vertical profiles varied under different categories of long-range transport. We found that the vertical PM2.5 concentration has a positive gradient with altitude when more polluted air was transported from China or North Korea and has negative gradient when cleaner air was transported from the East Sea. Unlike PM2.5, the O3 concentration did not depend significantly on the long-range transport scenario because of the short photochemical lifetime of O3 during summer. For local-scale air movements, we found no significant impact of local wind on the measured profiles.

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Section: Discussionsupporting

confidence: 92%

Vertical Profiles of PM2.5 and O3 Measured Using an Unmanned Aerial Vehicle (UAV) and Their Relationships with Synoptic- and Local-Scale Air Movements

Hwang,

Lee,

Shin

et al. 2024

Remote Sensing

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“…16 In the case of Chile, evidence to determine which of these mechanisms are most prominent is still limited. However, for the Metropolitan Region, Olivares et al (2023) find that the influence of non-local sources may not be as substantial, suggesting that the second mechanism could be more relevant. This observation aligns with the negative coefficients for altitude wind speed we observed in the first-stage regression, as shown in Table 11 of the paper.…”

Section: Empirical Strategymentioning

confidence: 80%

On the short‐term impact of pollution: The effect of PM 2.5 on emergency room visits

Dardati,

de Elejalde,

Giolito

2023

Health Economics

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In this paper, we study the short‐term effect of fine particulate matter (PM 2.5) exposure on respiratory emergency room (ER) visits in Chile, a middle‐income country with high levels of air pollution. To instrument for PM 2.5, we use wind speed at different altitudes (pressure levels). Unlike previous papers, our data allow us to study the impact of high pollution levels across all age groups. We find that a 1 μg per cubic meter (μg/m3) increase in PM 2.5 exposure for 1 day increases ER visits for respiratory illness by 0.36%. The effect is positive and significant for all age groups. Furthermore, the coefficients on government environmental alerts suggest that avoidance behavior becomes increasingly significant across all age groups as restrictions become more severe.

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A UAV-based method for efficiently measuring the spatial pattern of multiple air pollutants in street canyons

Ren,

Hu,

Lin

et al. 2024

Building and Environment

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Vertical distribution of PM2.5 in Santiago de Chile studied with an unmanned aerial vehicle and dispersion modelling

Cited by 4 publications

References 46 publications

Vertical Profiles of PM2.5 and O3 Measured Using an Unmanned Aerial Vehicle (UAV) and Their Relationships with Synoptic- and Local-Scale Air Movements

Vertical Profiles of PM2.5 and O3 Measured Using an Unmanned Aerial Vehicle (UAV) and Their Relationships with Synoptic- and Local-Scale Air Movements

On the short‐term impact of pollution: The effect of PM 2.5 on emergency room visits

A UAV-based method for efficiently measuring the spatial pattern of multiple air pollutants in street canyons

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