RETRACTED: Seasonal correlation of aerosols with soil moisture, evapotranspiration, and vegetation over Pakistan using remote sensing

Basharat, Uzma; Tariq, Salman; Chaudhry, Muhammad Nawaz; Khan, Muhammad; Agyekum, Ephraim Bonah; Mbasso, Wulfran Fendzi; Kamel, Salah

doi:10.1016/j.heliyon.2023.e20635

Cited by 8 publications

(1 citation statement)

References 80 publications

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“…Aerosols are the chemical complex of solid and liquid particles suspended in air (Ahmad et al, 2020;Basharat et al, 2023;Dagestani et al, 2023;Khan et al, 2023). They can come from both natural and anthropogenic activities (Duan et al, 2021;Tariq et al, 2021.…”

Section: Introductionmentioning

confidence: 99%

Analysis of nighttime aerosols and relation to covariates over a highly polluted sub‐Saharan site using Mann–Kendall and wavelet coherence approach

Köse,

Tariq,

Uyal

et al. 2024

J of Env Quality

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High emissions of aerosols and trace gases during nighttime can cause serious air quality, climate, and health issues, particularly in extremely polluted cities. In this paper, an effort has been made to examine the variations in aerosols and trace gases over a sub‐Saharan city of Ilorin (Nigeria) during nighttime. We have used Aerosol Robotic Network data of aerosol optical depth (AOD) at 500 nm, Angstrom exponent (AE) (440/870), and precipitable water (WVC). Both AE and WVC showed a decreasing trend of −0.0012% and −0.0010% per year, respectively. We also analyzed nighttime data of carbon monoxide (CO), methane (CH4), and ozone (O3) from Atmospheric Infrared Sounder and aerosol subtypes from CALIPSO (Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation). AOD, AE, and WVC average values are found to be 0.64 ± 0.33, 0.74 ± 0.24, and 3.40 ± 0.97, respectively. As a result of northeasterly winds carrying Saharan dust during the dry season, the greatest value of AOD (1.29) was observed in February. Desert dust aerosols (37.63%) were the most prevalent type, followed by mixed aerosols (44.15%). Winds at a height of 1500 m above ground level were likely transporting Saharan dust to Ilorin. CALIPSO images revealed that Ilorin's atmosphere contained dust, polluted continental, clean maritime, and polluted dust on high AOD days. The National Oceanic and Atmospheric Administration's vertical sounding profiles showed that the presence of high AOD values was caused by the inversion layer trapping aerosol pollution. Average nighttime concentrations of CO, O3, and CH4 were measured to be 127 ± 18, 29.7 ± 2.1, and 1822.6 ± 12.7 ppbv, respectively. The wavelet coherence spectra exhibited significant quasi‐biannual and quasi‐annual oscillations at statistically significant levels.

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