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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:
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 01/12/20 alle ore 19:28:46