Reply on RC2 DOI Creative Commons

Maria Velasquez Garcia

Published: June 17, 2024

Abstract. Assessing long-range transport (LRT) of pollutants recognizes that multiple sources varying scale and location can impact air quality. In the Aburrá Valley, Colombia, other cities in Northern South America, biomass burning (BB), dust, volcanic degassing have been identified as LRT aerosols. However, these on quality their characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load aerosol events. We identified, tracked, meteorologically characterized events evaluated concentration composition. ran a Positive Matrix Factorization (PMF) for each kind event, identifying high contribution organic carbon (OC1, OC2), F- secondary aerosols trace SO42- NO3- BB events, crustal mineral along with Ti Ca dust SO42-, Na, Al The increasing some ions toxic heavy metals (Cr, Mn, Cd, Ni) were also related influence. During fraction dominates by frequency amount, averaging 11.14 μg / m3 (38 %). On average, contribute 6.77 m3 (34 %) 6.46 μg / (30 concentrations. Of three, showed fewer affected days. study highlighted hotspot zones such Orinoco Middle Magdalena Valley aerosols, Caribbean Nevado del Ruíz volcano gives insights future modeling studies region supports strategies manage internal external pollution effects region.

Language: Английский

Hydroclimatic extremes in arid and semi-arid regions: status, challenges, and future outlook DOI
Ahmed El Kenawy

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 22

Published: Jan. 1, 2024

Language: Английский

Citations

5
Long-range transport of air pollutants increases the concentration of hazardous components of PM2.5 in northern South America DOI Creative Commons
Maria P. Velásquez-García, K. Santiago Hernández,

James A. Vergara-Correa

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(20), P. 11497 - 11520

Published: Oct. 16, 2024

Abstract. Long-range transport (LRT) of air pollutants from a range sources can substantially enhance background pollution levels, especially in urbanized regions, which exacerbate high-pollution episodes. In the Aburrá Valley (AV), Colombia, and other cities northern South America, biomass burning (BB), dust, volcanic degassing have been identified as long-range aerosol transport. However, impact these on quality characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load events AV. We identified, tracked, meteorologically characterized LRT evaluated their concentration composition. found that aerosols BB, influenced approximately 13 %, 8 % days year, respectively. applied positive-matrix-factorization (PMF) statistical model quantify concentrations compositions for different event types (e.g., BB). For BB events, we large contributions organic carbon (OC1 OC2), F−, secondary tracers (SO42- NO3-). dust crustal mineral components, along with Ti Ca, were primary contributors composition, while SO42-, Na, Al, Ca events. The some ions toxic heavy metals (Cr, Mn, Cd, Ni) also elevated volcanic-degassing contributed most levels (∼11 µg m−3), arising substantial (<7 m−3). Our study identifies Orinoco Middle Magdalena sizable Nevado del Ruiz source aerosols. Additionally, African reached Andean region via Caribbean route. As result, identify need future chemical-transport modeling studies new support strategies manage internal external degrade AV surrounding region.

Language: Английский

Citations

4
Health impacts of air pollution in South America: recent advances and research gaps DOI

Valeria Mardoñez-Balderrama,

Néstor Y. Rojas,

Andrea Pineda-Rojas

et al.

Current Opinion in Environmental Science & Health, Journal Year: 2025, Volume and Issue: unknown, P. 100627 - 100627

Published: May 1, 2025

Language: Английский

Citations

0
A Systematic Review and Bibliometric Analysis of the Impacts of COVID-19 on Economy and Mobility from the Geospatial Data Perspective DOI Creative Commons

Alfan Kurnia Yudha,

Natt Leelawat, Jing Tang

et al.

Results in Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 105282 - 105282

Published: May 1, 2025

Language: Английский

Citations

0
Assessing the influence of long-range transport of aerosols on the PM2.5 chemical composition and concentration in the Aburrá Valley DOI Creative Commons
Maria P. Velásquez-García, K. Santiago Hernández,

James A. Vergara-Correa

et al.

Published: April 18, 2024

Abstract. Assessing long-range transport (LRT) of pollutants recognizes that multiple sources varying scale and location can impact air quality. In the Aburrá Valley, Colombia, other cities in Northern South America, biomass burning (BB), dust, volcanic degassing have been identified as LRT aerosols. However, these on quality their characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load aerosol events. We identified, tracked, meteorologically characterized events evaluated concentration composition. ran a Positive Matrix Factorization (PMF) for each kind event, identifying high contribution organic carbon (OC1, OC2), F- secondary aerosols trace SO42- NO3- BB events, crustal mineral along with Ti Ca dust SO42-, Na, Al The increasing some ions toxic heavy metals (Cr, Mn, Cd, Ni) were also related influence. During fraction dominates by frequency amount, averaging 11.14 μg / m3 (38 %). On average, contribute 6.77 (34 %) 6.46 (30 concentrations. Of three, showed fewer affected days. study highlighted hotspot zones such Orinoco Middle Magdalena Valley aerosols, Caribbean Nevado del Ruíz volcano gives insights future modeling studies region supports strategies manage internal external pollution effects region.

Language: Английский

Citations

0
Comment on egusphere-2024-695 DOI Creative Commons
Maria P. Velásquez-García, K. Santiago Hernández, James A. Vergara-Correa

et al.

Published: April 29, 2024

Abstract. Assessing long-range transport (LRT) of pollutants recognizes that multiple sources varying scale and location can impact air quality. In the Aburrá Valley, Colombia, other cities in Northern South America, biomass burning (BB), dust, volcanic degassing have been identified as LRT aerosols. However, these on quality their characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load aerosol events. We identified, tracked, meteorologically characterized events evaluated concentration composition. ran a Positive Matrix Factorization (PMF) for each kind event, identifying high contribution organic carbon (OC1, OC2), F- secondary aerosols trace SO42- NO3- BB events, crustal mineral along with Ti Ca dust SO42-, Na, Al The increasing some ions toxic heavy metals (Cr, Mn, Cd, Ni) were also related influence. During fraction dominates by frequency amount, averaging 11.14 μg / m3 (38 %). On average, contribute 6.77 m3 (34 %) 6.46 μg / (30 concentrations. Of three, showed fewer affected days. study highlighted hotspot zones such Orinoco Middle Magdalena Valley aerosols, Caribbean Nevado del Ruíz volcano gives insights future modeling studies region supports strategies manage internal external pollution effects region.

Language: Английский

Citations

0
Comment on egusphere-2024-695 DOI Creative Commons
Maria P. Velásquez-García, K. Santiago Hernández,

James A. Vergara-Correa

et al.

Published: May 8, 2024

Abstract. Assessing long-range transport (LRT) of pollutants recognizes that multiple sources varying scale and location can impact air quality. In the Aburrá Valley, Colombia, other cities in Northern South America, biomass burning (BB), dust, volcanic degassing have been identified as LRT aerosols. However, these on quality their characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load aerosol events. We identified, tracked, meteorologically characterized events evaluated concentration composition. ran a Positive Matrix Factorization (PMF) for each kind event, identifying high contribution organic carbon (OC1, OC2), F- secondary aerosols trace SO42- NO3- BB events, crustal mineral along with Ti Ca dust SO42-, Na, Al The increasing some ions toxic heavy metals (Cr, Mn, Cd, Ni) were also related influence. During fraction dominates by frequency amount, averaging 11.14 μg / m3 (38 %). On average, contribute 6.77 m3 (34 %) 6.46 μg / (30 concentrations. Of three, showed fewer affected days. study highlighted hotspot zones such Orinoco Middle Magdalena Valley aerosols, Caribbean Nevado del Ruíz volcano gives insights future modeling studies region supports strategies manage internal external pollution effects region.

Language: Английский

Citations

0
Reply on RC1 DOI Creative Commons

Maria Velasquez Garcia

Published: June 17, 2024

Abstract. Assessing long-range transport (LRT) of pollutants recognizes that multiple sources varying scale and location can impact air quality. In the Aburrá Valley, Colombia, other cities in Northern South America, biomass burning (BB), dust, volcanic degassing have been identified as LRT aerosols. However, these on quality their characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load aerosol events. We identified, tracked, meteorologically characterized events evaluated concentration composition. ran a Positive Matrix Factorization (PMF) for each kind event, identifying high contribution organic carbon (OC1, OC2), F- secondary aerosols trace SO42- NO3- BB events, crustal mineral along with Ti Ca dust SO42-, Na, Al The increasing some ions toxic heavy metals (Cr, Mn, Cd, Ni) were also related influence. During fraction dominates by frequency amount, averaging 11.14 μg / m3 (38 %). On average, contribute 6.77 m3 (34 %) 6.46 μg / (30 concentrations. Of three, showed fewer affected days. study highlighted hotspot zones such Orinoco Middle Magdalena Valley aerosols, Caribbean Nevado del Ruíz volcano gives insights future modeling studies region supports strategies manage internal external pollution effects region.

Language: Английский

Citations

0
Reply on RC2 DOI Creative Commons

Maria Velasquez Garcia

Published: June 17, 2024

Abstract. Assessing long-range transport (LRT) of pollutants recognizes that multiple sources varying scale and location can impact air quality. In the Aburrá Valley, Colombia, other cities in Northern South America, biomass burning (BB), dust, volcanic degassing have been identified as LRT aerosols. However, these on quality their characterization yet to be thoroughly studied. This work investigates influence chemical composition PM2.5 during annual intra-annual high-load aerosol events. We identified, tracked, meteorologically characterized events evaluated concentration composition. ran a Positive Matrix Factorization (PMF) for each kind event, identifying high contribution organic carbon (OC1, OC2), F- secondary aerosols trace SO42- NO3- BB events, crustal mineral along with Ti Ca dust SO42-, Na, Al The increasing some ions toxic heavy metals (Cr, Mn, Cd, Ni) were also related influence. During fraction dominates by frequency amount, averaging 11.14 μg / m3 (38 %). On average, contribute 6.77 m3 (34 %) 6.46 μg / (30 concentrations. Of three, showed fewer affected days. study highlighted hotspot zones such Orinoco Middle Magdalena Valley aerosols, Caribbean Nevado del Ruíz volcano gives insights future modeling studies region supports strategies manage internal external pollution effects region.

Language: Английский

Citations

0