Analysis of Ground Level Ozone and Nitrogen Oxides in the City of Dar es Salaam and the Rural Area of Bagamoyo, Tanzania

Simple item page
dc.contributor.authorHamdun, Asha
dc.contributor.authorArakaki, T.
dc.date.accessioned2016-07-14T20:50:53Z
dc.date.available2016-07-14T20:50:53Z
dc.date.issued2015-01
dc.description.abstractFrom 2012 to 2015, we measured surface ozone, NOx, NO2, and NO levels at three urban sites (Ma-pipa, Ubungo, and Posta) and two suburban sites (Kunduchi and Vijibweni) in the city of Dar es Salaam and in the village of Mwetemo, a rural area of Bagamoyo, Tanzania. The average hourly O3 concentrations at all sites were between 9 ppb and 30 ppb during our sampling periods. O3 levels at suburban sites were generally higher than at urban sites. The average hourly concentrations in Dar es Salaam were 10 - 32 ppb, while in Bagamoyo they were 9 - 15 ppb. We observed a strong diurnal variation in Dar es Salaam while measurements from Bagamoyo showed little variation. At Dar es Salaam, the surface O3 concentrations increased from their minimum level at sunrise (around 6:00 a.m.) to a maximum in the late afternoon (around 4:00 p.m.), and then decreased toward 11:00 p.m. Another secondary ozone peak appeared between midnight and ~4:00 a.m., after which the surface ozone concentrations decreased to a minimum around 7:00 a.m. NO2 concentrations were higher at the urban sites of Ubungo and Posta, and their weekly average NO2 concentrations were 246 ppb and 118 ppb, respectively. Weekly average NOx concentrations ranged from 39.4 ppb at the Kunduchi site (suburban) to 738 ppb at the Ubungo site (urban). To our knowledge, there were few continuous measurements of ozone and nitrogen oxides concentrations in Tanza-nia. Since high NOx concentrations were observed, continuous air quality monitoring and effective air pollution control measures are required in Dar es Salaam to prevent further deterioration of air quality and limit the possible negative impacts on humans and vegetation.en_US
dc.identifier.citationHamdun, A.M. and Arakaki, T., 2015. Analysis of Ground Level Ozone and Nitrogen Oxides in the City of Dar es Salaam and the Rural Area of Bagamoyo, Tanzania. Open Journal of Air Pollution, 4(04), p.224.en_US
dc.identifier.doi10.4236/ojap.2015.44019
dc.identifier.urihttp://hdl.handle.net/20.500.11810/3208
dc.language.isoenen_US
dc.subjectOzoneen_US
dc.subjectNOxen_US
dc.subjectDaily Variationen_US
dc.subjectBagamoyen_US
dc.subjectDar es Salaamen_US
dc.titleAnalysis of Ground Level Ozone and Nitrogen Oxides in the City of Dar es Salaam and the Rural Area of Bagamoyo, Tanzaniaen_US
dc.typeJournal Article, Peer Revieweden_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Analysis_of_Ground_Level_Ozone_and_Nitrogen_Oxides.pdf
Size:
8.37 MB
Format:
Adobe Portable Document Format
Description:
Full text
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Aquatic Sciences and Fisheries Technology