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Titolo: AIR-POLLUTION OVER PIETERMARITZBURG DURING THE PASSAGE OF COLD FRONTS
Autore: SIMPSON AJ; MCGEE OS;
- Indirizzi:
- UNIV NATAL,DEPT GEOG,PRIVATE BAG X01 SCOTTSVILLE 3209 SOUTH AFRICA
- Titolo Testata:
- South African journal of science
fascicolo: 1,
volume: 92,
anno: 1996,
pagine: 45 - 46
- SICI:
- 0038-2353(1996)92:1<45:AOPDTP>2.0.ZU;2-O
- Fonte:
- ISI
- Lingua:
- ENG
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Science Citation Index Expanded
- Citazioni:
- 3
- Recensione:
- Indirizzi per estratti:
-
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- Citazione:
- A.J. Simpson e O.S. Mcgee, "AIR-POLLUTION OVER PIETERMARITZBURG DURING THE PASSAGE OF COLD FRONTS", South African journal of science, 92(1), 1996, pp. 45-46
Abstract
The air pollution dispersion climatology of Pietermaritzburg displayscycles at three interrelated scales. There is a seasonal increase of pollution during winter largely as a result of the anticyclone macroclimatology of southern Africa. It is then, too, that conditions are exacerbated in the Pietermaritzburg basin by local topographically controlled climatology; in the clear-sky conditions associated with the anticyclone a regular increase in pollution at night is followed by a daytime clearing. (1,2) Finally, conditions are alleviated every five to IO days during winter by the passage of the well-known sequence across southern Kwa-Zulu-Natal of northwesterly Berg winds, a lee depression (coastal low), westerly wave and cold front driven by wind having a strong southerly component. This periodic dissipation of pollution during the passing synoptic episodes is illustrated below in the records of24-hour smoke concentrations during July and August 1994.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 17/01/21 alle ore 22:16:48