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Suspended particulate matter and its relations to the urban climate in Dar es Salaam, Tanzania
SMHI, Forskningsavdelningen, Luftmiljö.ORCID-id: 0000-0002-3712-2170
2004 (engelsk)Inngår i: Atmospheric Environment, ISSN 1352-2310, E-ISSN 1873-2844, Vol. 38, nr 25, s. 4175-4181Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Relationships between sources and levels of particulate matter and climatic parameters (urban heat island intensity, wind speed, temperature and relative humidity) were investigated in the coastal city of Dar es Salaam, Tanzania's largest city. Measurements were made during the wet and dry seasons of 2001 at an urban and a rural site. Five elements were used to represent different sources: K in fine particles (biomass), Zn in fine particles (industry), Cl in coarse particles (sea spray), Ti in coarse particles (soil) and Pb in fine particles (traffic). The concentrations of these elements varied considerably between the urban and rural site during both the wet and dry season, with the urban site in the dry season having the highest concentrations. Diurnal differences are also apparent, although not as straightforward. In an attempt to explain these differences, correlations between all elements and the climatic parameters were investigated. The results show that the nocturnal urban heat island intensity was positively correlated and wind speed negatively correlated with particulate levels, presumably due to the increased atmospheric stability. (C) 2004 Elsevier Ltd. All rights reserved.

sted, utgiver, år, opplag, sider
2004. Vol. 38, nr 25, s. 4175-4181
Emneord [en]
urban climate, suspended particulate matter, elements, energy dispersive X-ray fluorescence, Dar es Salaam, seasonal variations
HSV kategori
Forskningsprogram
Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-1307DOI: 10.1016/j.atmosenv.2004.04.021ISI: 000222706000009OAI: oai:DiVA.org:smhi-1307DiVA, id: diva2:817983
Tilgjengelig fra: 2015-06-08 Laget: 2015-05-26 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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