Estimating sectoral pollution load in Lagos by Industrial Pollution Projection System (IPPS)

Oketola, Adebola A.; Osibanjo, Oladele

doi:10.1016/j.scitotenv.2006.12.054

Cited by 27 publications

(23 citation statements)

References 1 publication

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“…Different AAOD thresholds are used for different regions of Africa as discussed in the text. (Oketola and Osibanjo, 2007;Hopkins et al, 2009;Reeves et al, 2010), biofuel use that is particularly intense in rural Nigeria (Yevich and Logan, 2003), and gas flaring in the Niger Delta (Casadio et al, 2012). Other African countries that practice gas flaring related to the oil and gas industry include Libya, Algeria, Angola, Egypt, Gabon, Sudan, Congo and Tunisia (Casadio et al, 2012).…”

Section: E a Marais Et Al: Isoprene Emissions In Africamentioning

confidence: 99%

Isoprene emissions in Africa inferred from OMI observations of formaldehyde columns

et al. 2012

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Abstract. We use 2005-2009 satellite observations of formaldehyde (HCHO) columns from the OMI instrument to infer biogenic isoprene emissions at monthly 1 × 1 • resolution over the African continent. Our work includes new approaches to remove biomass burning influences using OMI absorbing aerosol optical depth data (to account for transport of fire plumes) and anthropogenic influences using AATSR satellite data for persistent small-flame fires (gas flaring). The resulting biogenic HCHO columns ( HCHO ) from OMI follow closely the distribution of vegetation patterns in Africa. We infer isoprene emission (E ISOP ) from the local sensitivity S = HCHO / E ISOP derived with the GEOS-Chem chemical transport model using two alternate isoprene oxidation mechanisms, and verify the validity of this approach using AMMA aircraft observations over West Africa and a longitudinal transect across central Africa. Displacement error (smearing) is diagnosed by anomalously high values of S and the corresponding data are removed. We find significant sensitivity of S to NO x under low-NO x conditions that we fit to a linear function of tropospheric column NO 2 . We estimate a 40 % error in our inferred isoprene emissions under high-NO x conditions and 40-90 % under low-NO x conditions. Our results suggest that isoprene emission from the central African rainforest is much lower than estimated by the state-of-the-science MEGAN inventory.

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Section: E a Marais Et Al: Isoprene Emissions In Africamentioning

confidence: 99%

Isoprene emissions in Africa inferred from OMI observations of formaldehyde columns

et al. 2012

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“…Given no comparable information for Lagos, we do not adjust our value for these variations. (Oketola et al, 2007), two developing Asian mega-cities (Guttikunda et al, 2000) and two developed mega-cities (Guttikunda et al, 2005;Mattai et al, 2003). Our CO estimate (1.44 Tg yr −1 ) is higher than that calculated by Oketola et al (2007) (0.81 Tg yr −1 ) and the summary of other estimations given for Lagos by Butler et al (2008) (0.771 to 1.006 Tg yr 1 ).…”

Section: Calculation Of Emission Fluxes From Lagosmentioning

confidence: 99%

Direct estimates of emissions from the megacity of Lagos

et al. 2009

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Abstract. We report here top-down emissions estimates for an African megacity. A boundary layer circumnavigation of Lagos, Nigeria was completed using the FAAM BAe146 aircraft as part of the AMMA project. These observations together with an inferred boundary layer height allow the flux of pollutants to be calculated. Extrapolation gives annual emissions for CO, NO x , and VOCs of 1.44 Tg yr −1 , 0.03 Tg yr −1 and 0.37 Tg yr −1 respectively with uncertainties of +250 / −60 %. These inferred emissions are consistent with bottom-up estimates for other developing megacities and are attributed to the evaporation of fuels, mobile combustion and natural gas emissions.

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“…Despite their importance, such systems are still relatively rarely studied, though interest in them is increasing (Huang et al 2013;Manning 2011;Oketola and Osibanjo 2007;Oyeyiola et al 2013;Qiao et al 2013). …”

Section: Fractionation and Ecotoxicological Implication Of Potentiallmentioning

confidence: 99%

“…Lagos State is the most heavily industrialised in Nigeriareported to be home to between 68 and 80% of the country's medium and large-scale manufacturing industries (Oketola and Osibanjo 2007) -and the City of Lagos is expanding rapidly with the ambition to become an international hub for trade and industry. Odo-Iyaalaro, Shasha and Ibeshe Rivers are the main trans-urban rivers in the state.…”

Section: Fractionation and Ecotoxicological Implication Of Potentiallmentioning

confidence: 99%

Fractionation and ecotoxicological implication of potentially toxic metals in sediments of three urban rivers and the Lagos Lagoon, Nigeria, West Africa

Oyeyiola

Davidson

Olayinka

et al. 2014

Environ Monit Assess

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This version is available at https://strathprints.strath.ac.uk/49046/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Application of risk assessment codes and Hankanson potential risk indices indicated that Cd was the element of greatest concern in the Lagos Lagoon system. The study indicated that there is a need to strengthen environmental management and pollution control measures to reduce risk from PTM, but that even relatively simple strategies, such as seasonal restrictions on dredging and fishing, could be beneficial.

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Estimating sectoral pollution load in Lagos by Industrial Pollution Projection System (IPPS)

Cited by 27 publications

References 1 publication

Isoprene emissions in Africa inferred from OMI observations of formaldehyde columns

Isoprene emissions in Africa inferred from OMI observations of formaldehyde columns

Direct estimates of emissions from the megacity of Lagos

Fractionation and ecotoxicological implication of potentially toxic metals in sediments of three urban rivers and the Lagos Lagoon, Nigeria, West Africa

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