| Title: |
Variability of ambient particulate matter loading at Henties Bay, Namibia |
| Authors: |
Belelie, Monray D.; Havenga, Henno; Klopper, Danitza; Garland, Rebecca M.; Language, Brigitte; Formenti, Paola; Namwoonde, Andreas; Burger, Roelof P.; Piketh, Stuart J. |
| Publisher Information: |
National Association for Clean Air |
| Publication Year: |
2023 |
| Collection: |
University of Pretoria: UPSpace |
| Subject Terms: |
Stratocumulus cloud; Aerosol studies; Namibian coast; High (HAE) PM concentration; low (LAE) PM concentration; Hybrid single-particle Lagrangian integrated trajectory (HYSPLIT); Particulate matter (PM); SDG-11: Sustainable cities and communities |
| Description: |
An earlier version of this paper was presented at the National Association of Clean Air (NACA) Conference in October 2022 and was published in its Proceedings. ; The Namibian coast is one of the areas of international interest for aerosol studies. This is due to the region’s importance for the global radiation budget because of the presence of a semi-permanent stratocumulus cloud along the coast. Aerosol particles may scatter/ absorb radiation and directly influence how long clouds last by modifying their properties. This is all dependent on the particles’ chemical and physical properties influenced by the sources they were emitted from. In this study, we identified and investigated episodes of high (HAE) and low (LAE) PM concentrations and the meteorology that may favour their occurrence. Here, we investigated PM2.5 (particles with an aerodynamic diameter of 2.5 μm or less) and PM10 (particles with an aerodynamic diameter of 10 μm or less) at Henties Bay, Namibia. Daily aerosol measurements were taken with E-samplers between 15 and 29 July 2019. The Hybrid Single- Particle Lagrangian Integrated Trajectory (HYSPLIT) model was used to investigate the long-range atmospheric transport of air masses that reached Henties Bay. The study found that during HAEs, the average PM2.5 concentration was 28.40 ± 18.10 μg/m3 and the average PM10 concentration was 68.20 ± 44.3 μg/m3. In contrast, during LAEs, the average PM2.5 concentration was 13.3 ± 9.52 μg/m3 and the average PM10 concentration was 30.00 ± 23.00 μg/m3. In both fractions, there was an observed dominant contribution from marine sources. ; The National Research Foundation of South Africa. ; http://www.cleanairjournal.org.za ; am2024 ; Geography, Geoinformatics and Meteorology ; None |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
http://hdl.handle.net/2263/95724 |
| DOI: |
10.17159/caj/2023/33/2.16670 |
| Availability: |
http://hdl.handle.net/2263/95724; https://doi.org/10.17159/caj/2023/33/2.16670 |
| Rights: |
© 2023. The Author(s). Published under a Creative Commons Attribution Licence. |
| Accession Number: |
edsbas.F548611B |
| Database: |
BASE |