Strong Saharan Dust Event Detected at Lalinet LOA-UNAL Station, over Medellín, Colombia by Active and Passive Remote Sensing

Bedoya, Andrés Esteban; Nisperuza, Daniel; Alegría, Dairo; Múnera, Mauricio; Guerrero-Rascado, Juan Luís; Zapata, Carmen E.; Jiménez, José Mondéjar; Landulfo, Eduardo; Bastidas, Álvaro

doi:10.1051/epjconf/201611908006

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, τ du,MODIS indicates an optically thick dust plume, centered near 15 • N, 30 • W, that has been advected over the tropical Atlantic from the Sahara (Figure 4a). This particularly strong event allowed for dust to be measured in-situ as far as Colombia (Bedoya et al 2016). In figure 4, grid cells that are missing estimates of τ du or AOD, or grid cells over land, are masked in grey.…”

Section: A Comparison Of Modis and τ Duav Hrrmentioning

confidence: 99%

A New Satellite-Based Global Climatology of Dust Aerosol Optical Depth

Voss

Evan

2020

Journal of Applied Meteorology and Climatology

View full text Add to dashboard Cite

By mass, dust is the largest contributor to global aerosol burden, yet long-term observational records of dust, particularly over the ocean, are limited. Here, two nearly global observational datasets of dust aerosol optical depth τd are created primarily on the basis of optical measurements of the aerosol column from 1) the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra satellite spanning from 2001 to 2018 and 2) the Advanced Very High Resolution Radiometer (AVHRR) from 1981 to 2018. The quality of the new data is assessed by comparison with existing dust datasets that are spatially more limited. Between 2001 and 2018, τd decreased over Asia and increased significantly over the Sahara, Middle East, and parts of eastern Europe, with the largest increase found over the Aral Sea where emissive playa surfaces have been exposed. These daily, observational, and nearly global records of dust will allow for improvement in understanding the role of dust in climate variability.

show abstract

Section: A Comparison Of Modis and τ Duav Hrrmentioning

confidence: 99%

A New Satellite-Based Global Climatology of Dust Aerosol Optical Depth

Voss

Evan

2020

Journal of Applied Meteorology and Climatology

View full text Add to dashboard Cite

show abstract

“…Sea salt is almost as important as SO 4 during the first trimester, as the valley where Medellin is situated is on the path of the easterly flow and trade winds that come from the Caribbean sea 55 . Medellin is also affected by intrusion of Sahara dust advected from Africa 56 , 57 , which explains the dust contribution in Fig. S8 .…”

Section: Resultsmentioning

confidence: 94%

Latitudinal and temporal distribution of aerosols and precipitable water vapor in the tropical Andes from AERONET, sounding, and MERRA-2 data

Cazorla,

Giles,

Herrera

et al. 2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

The aerosol and precipitable water vapor (PW) distribution over the tropical Andes region is characterized using Aerosol Robotic Network (AERONET) observations at stations in Medellin (Colombia), Quito (Ecuador), Huancayo (Peru), and La Paz (Bolivia). AERONET aerosol optical depth (AOD) is interpreted using PM2.5 data when available. Columnar water vapor derived from ozone soundings at Quito is used to compare against AERONET PW. MERRA-2 data are used to complement analyses. Urban pollution and biomass burning smoke (BBS) dominate the regional aerosol composition. AOD and PM2.5 yearly cycles for coincident measurements correlate linearly at Medellin and Quito. The Andes cordillera’s orientation and elevation funnel or block BBS transport into valleys or highlands during the two fire seasons that systematically impact South America. The February–March season north of Colombia and the Colombian-Venezuelan border directly impacts Medellin. Possibly, the March aerosol signal over Quito has a long-range transport component. At Huancayo and La Paz, AOD increases in September due to the influence of BBS in the Amazon. AERONET PW and sounding data correlate linearly but a dry bias with respect to soundings was identified in AERONET. PW and rainfall progressively decrease from north to south due to increasing altitude. This regional diagnosis is an underlying basis to evaluate future changes in aerosol and PW given prevailing conditions of rapidly changing atmospheric composition.

show abstract

Global transport of dust emitted from different regions of the Sahara

Lamancusa

Wagstrom

2019

Atmospheric Environment

View full text Add to dashboard Cite

Strong Saharan Dust Event Detected at Lalinet LOA-UNAL Station, over Medellín, Colombia by Active and Passive Remote Sensing

Cited by 3 publications

References 8 publications

A New Satellite-Based Global Climatology of Dust Aerosol Optical Depth

A New Satellite-Based Global Climatology of Dust Aerosol Optical Depth

Latitudinal and temporal distribution of aerosols and precipitable water vapor in the tropical Andes from AERONET, sounding, and MERRA-2 data

Global transport of dust emitted from different regions of the Sahara

Contact Info

Product

Resources

About