SO2 seasonal variation and assessment of Ozone Monitoring Instrument (OMI) measurements at Sharpeville (27.86°E; 26.68°S) a South African ground-based station

dc.contributor.authorSangeetha, S.K.
dc.contributor.authorSivakumar, V.
dc.contributor.authorJosipovic, M.
dc.contributor.authorGebreslasie, M.
dc.contributor.authorWright, Caradee Yael
dc.date.accessioned2017-11-10T06:21:48Z
dc.date.issued2017-08
dc.description.abstractIn this study, seasonal, inter-annual variations of sulphur dioxide (SO2) were analysed for Sharpeville, South Africa (27.86°E; 26.68°S) for the period 2007–2013. Sharpeville is a residential site located within a highly industrialized region. Inter-annual variations were investigated by analysis of data collated by a ground-based (GB) instrument as well as the SO2 retrievals recorded by the Ozone Monitoring Instrument (OMI), a satellite-based sensor. The planetary boundary layer (PBL) SO2 vertical column data recorded by OMI were converted to surface SO2 volume mixing ratios using the pressure difference between surface and PBL. Accordingly, the OMI-derived SO2 measurements overestimated GB values and showed a good correlation with GB data in the austral winter. Besides this, the overall comparisons i.e. their daily, seasonal, and yearly correlation studies found that OMI-derived measurements was in better agreement with GB regardless of its moderate relative percentage of difference with GB. The seasonal variations of SO2 demonstrated that GB and OMI-derived measurements followed a general pattern of increasing trend from autumn until late winter and decreased from the onset of spring; however, the latter showed unique high SO2 levels in summer. Together with this, the inter-annual variations of both computations displayed a small decrement in SO2 values during the period 2011–2013. This however proved to be a stable variation when compared to other countries.en_ZA
dc.description.departmentGeography, Geoinformatics and Meteorologyen_ZA
dc.description.embargo2018-08-10
dc.description.librarianhj2017en_ZA
dc.description.sponsorshipThe first author (SKS) thanks the South African National Space Agency (SANSA) Earth observation for financially supporting to conduct this study. CYW receives funding support from the South African Medical Research Council and the National Research Foundation.en_ZA
dc.description.urihttp://www.tandfonline.com/loi/tres20en_ZA
dc.identifier.citationS.K. Sangeetha, V. Sivakumar, M. Josipovic, M. Gebreslasie & C. Y. Wright (2017) SO2 seasonal variation and assessment of Ozone Monitoring Instrument (OMI) measurements at Sharpeville (27.86°E; 26.68°S) a South African ground-based station, International Journal of Remote Sensing, 38:23, 6680-6696, DOI: 10.1080/01431161.2017.1363433.en_ZA
dc.identifier.issn0143-1161 (print)
dc.identifier.issn1366-5901 (online)
dc.identifier.other10.1080/01431161.2017.1363433
dc.identifier.urihttp://hdl.handle.net/2263/63085
dc.language.isoenen_ZA
dc.publisherTaylor and Francisen_ZA
dc.rights© 2017 Informa UK Limited, trading as Taylor & Francis Group. This is an electronic version of an article published in International Journal of Remote Sensing , vol. 38, no. 23, pp. 6680-6696, 2017. doi : 10.1080/01431161.2017.1363433. International Journal of Remote Sensing is available online at : http://www.tandfonline.com/loi/tres20.en_ZA
dc.subjectSulphur dioxide (SO2)en_ZA
dc.subjectOzone monitoring instrument (OMI)en_ZA
dc.subjectSatellite-based sensoren_ZA
dc.subjectGround-based (GB) instrumenten_ZA
dc.subjectPlanetary boundary layer (PBL)en_ZA
dc.subjectAir pollutionen_ZA
dc.subjectTrace gasesen_ZA
dc.subjectTransporten_ZA
dc.subjectEmissionsen_ZA
dc.subjectSatellite observationsen_ZA
dc.subjectVariabilityen_ZA
dc.subjectRetrievalen_ZA
dc.titleSO2 seasonal variation and assessment of Ozone Monitoring Instrument (OMI) measurements at Sharpeville (27.86°E; 26.68°S) a South African ground-based stationen_ZA
dc.typePostprint Articleen_ZA

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