Characteristics of Absorbing and Non-Absorbing Aerosol over South Africa using MODIS and OMI satellite measurements DOI Creative Commons
Onyeuwaoma Nnaemeka Dom, Venkataraman Sivakumar

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 5, 2023

Abstract A study on the spatiotemporal variation of aerosols over South Africa was conducted using MODIS, OMI, MERRA-2 and CALIPSO data from 2004 to 2023. The showed that absorbing dominates aerosol regime in all locations while exhibiting seasonal variations. Further this, were apportioned different sources each location HYSPLIT cluster analysis. During period under consideration, loading AAOD increase almost peak during spring (SON) summer (DJF). This work also diurnally varies extensively at some locations. Consequently, Kalahari Desert (KD) Namibian (ND) are leading dust Africa, especially within northeast northwestern parts country, industrial emissions biomass footprints observed. Elevated smoke observed around ports coastlines which is likely ships docking ports. Finally, demonstrated Durban (DBN), Nelspruit (NPT), Cape Town (CPT) Polokwane (PLK) most polluted sites major constituents identified be elevated addition contribution marine for DBN. Hence, more than 37% aggregated occurred where very conspicuous. high concentration attributable wind prevalent these socio-economic activities therein.

Language: Английский

Challenges and Prospects of Aerosol-Cloud-Precipitation Studies Over Africa DOI Open Access
A. Joseph Adesina, Olanrewaju B. Wojuola

Qeios, Journal Year: 2025, Volume and Issue: 7(1)

Published: Jan. 6, 2025

Africa's distinctive climate and varied terrain present a crucial domain for examining the intricate relationships between aerosol-cloud-precipitation their implications regional climate, water resources, agriculture. Advances in satellite technology, field research, numerical modeling have propelled progress this field. Satellite instruments facilitated understanding of aerosol properties interplay with clouds precipitation, while ground-based airborne measurements from initiatives like Aerosols, Radiation, Clouds southern Africa AEROCLO-sA, Dynamics-Aerosol-Chemistry-Cloud Interactions West DACCIWA provided essential data complementing observations. However, challenges persist, including scarcity, rugged landscapes, uncertainties feedback mechanisms. Machine learning, state-of-the-art sensors advanced high-resolution lidar systems offer promise enhancing observation dynamics. Collaborative research efforts, such as EU–Africa Innovation Cooperation Programs, which engage international partnerships, potential to facilitate knowledge exchange, improve skills, promote sharing.

Language: Английский

Citations

0
Characterization of aerosol optical depth (AOD) anomalies in September and October 2022 over Skukuza in South Africa DOI Creative Commons
Marion Ranaivombola, Nelson Bègue, Lucas Vaz Peres

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(6), P. 3519 - 3540

Published: March 25, 2025

Abstract. Most major field campaigns, such as the Southern Africa Fire Atmosphere Research Initiative (SAFARI-92 and SAFARI-2000) AErosol, RadiatiOn CLOuds in southern (AEROCLO-sA), have focused on west coast of Africa, leaving east underexplored. To address this, Biomass Burning Aerosol Campaign (BiBAC) was initiated by IRP ARSAIO (International Project – Atmospheric Indian Ocean) during 2022 biomass burning season to study aerosol optical properties over southwestern Ocean (SWIO). This analyzes intensive observation period (IOP) BiBAC at Skukuza Kruger National Park two events: 18–23 September (Event 1) 9–17 October 2). Sun-photometer data, consistent with CALIOP (Cloud-Aerosol Lidar Orthogonal Polarization), revealed a predominance aerosols. Transport analyses show southeastward movement carbon monoxide (CO) aerosols, reaching up 6 km Event 1 10 2. Synoptic conditions, including frontal systems baroclinic waves, drove regional intercontinental pollutant transport, impacting Mozambique Channel surrounding areas. A “river smoke” observed suggests novel synoptic conditions compared previous studies. is first highlight distinct transport mechanisms plumes CO from South America toward SWIO basin, underscoring significance east-coast observations understanding global atmospheric dynamics.

Language: Английский

Citations

0
Spatio-temporal variation of absorbing aerosol over South Africa using satellite measurements DOI
Onyeuwaoma Nnaemeka Dom, Venkataraman Sivakumar

Aerosol Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 17

Published: Jan. 23, 2025

Language: Английский

Citations

0
Aerosol optical properties over three cities of Angola using long term AERONET data DOI
Pascoal M. D. Campos,

Angella G. Moses,

Ke Li

et al.

Atmospheric Pollution Research, Journal Year: 2025, Volume and Issue: unknown, P. 102559 - 102559

Published: April 1, 2025

Language: Английский

Citations

0
Changing patterns in the highly contributing aerosol types/species across the globe in the past two decades DOI Creative Commons
Gopika Gupta, M. Venkat Ratnam, B.L. Madhavan

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 897, P. 165389 - 165389

Published: July 7, 2023

Language: Английский

Citations

4
Characteristics of Absorbing and Non-Absorbing Aerosol over South Africa using MODIS and OMI satellite measurements DOI Creative Commons
Onyeuwaoma Nnaemeka Dom, Venkataraman Sivakumar

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 5, 2023

Abstract A study on the spatiotemporal variation of aerosols over South Africa was conducted using MODIS, OMI, MERRA-2 and CALIPSO data from 2004 to 2023. The showed that absorbing dominates aerosol regime in all locations while exhibiting seasonal variations. Further this, were apportioned different sources each location HYSPLIT cluster analysis. During period under consideration, loading AAOD increase almost peak during spring (SON) summer (DJF). This work also diurnally varies extensively at some locations. Consequently, Kalahari Desert (KD) Namibian (ND) are leading dust Africa, especially within northeast northwestern parts country, industrial emissions biomass footprints observed. Elevated smoke observed around ports coastlines which is likely ships docking ports. Finally, demonstrated Durban (DBN), Nelspruit (NPT), Cape Town (CPT) Polokwane (PLK) most polluted sites major constituents identified be elevated addition contribution marine for DBN. Hence, more than 37% aggregated occurred where very conspicuous. high concentration attributable wind prevalent these socio-economic activities therein.

Language: Английский

Citations

0