Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg

Garland, Rebecca MSivakumar, V2013-02-042013-02-042012-09Garland, R.M. and Sivakumar, V. 2012. Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg. South African Society for Atmospheric Sciences Annual Conference, Cape Town, 26-27 September 2012978-0-620-53375-1http://hdl.handle.net/10204/6527South African Society for Atmospheric Sciences Annual Conference, Cape Town, 26-27 September 2012This project studied the relationship between aerosol optical depth (AOD) from the Multi-angle Imaging SpectroRadiometer (MISR) instrument on the Terra satellite, and ground-based monitored particulate matter (PM) mass concentrations measured at the City of Johannesburg monitoring sites. AOD is the vertical integral of the extinction coefficient (sext) at a specific wavelength in a column of air from the surface to the top of the atmosphere. In general, higher AOD values indicate a larger aerosol load in the column of air. However as sext is dependent upon the optical properties of the aerosols, which in turn can be impacted by factors such as refractive index, size and shape, the AOD of a column of aerosol particles is dependent upon more than just the aerosol load. These parameters can be impacted by meteorological factors as well. Thus, the PM-AOD relationship may be complex.enAerosol optical depthMulti-angle Imaging SpectroRadiometerMISRMeteorological factorsCity of JohannesburgParticulate matterPMExploring the relationship between monitored ground-based and satellite aerosol measurements over the City of JohannesburgConference PresentationGarland, R. M., & Sivakumar, V. (2012). Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg. http://hdl.handle.net/10204/6527Garland, Rebecca M, and V Sivakumar. "Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg." (2012): http://hdl.handle.net/10204/6527Garland RM, Sivakumar V, Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg; 2012. http://hdl.handle.net/10204/6527 .TY - Conference Presentation AU - Garland, Rebecca M AU - Sivakumar, V AB - This project studied the relationship between aerosol optical depth (AOD) from the Multi-angle Imaging SpectroRadiometer (MISR) instrument on the Terra satellite, and ground-based monitored particulate matter (PM) mass concentrations measured at the City of Johannesburg monitoring sites. AOD is the vertical integral of the extinction coefficient (sext) at a specific wavelength in a column of air from the surface to the top of the atmosphere. In general, higher AOD values indicate a larger aerosol load in the column of air. However as sext is dependent upon the optical properties of the aerosols, which in turn can be impacted by factors such as refractive index, size and shape, the AOD of a column of aerosol particles is dependent upon more than just the aerosol load. These parameters can be impacted by meteorological factors as well. Thus, the PM-AOD relationship may be complex. DA - 2012-09 DB - ResearchSpace DP - CSIR KW - Aerosol optical depth KW - Multi-angle Imaging SpectroRadiometer KW - MISR KW - Meteorological factors KW - City of Johannesburg KW - Particulate matter KW - PM LK - https://researchspace.csir.co.za PY - 2012 SM - 978-0-620-53375-1 T1 - Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg TI - Exploring the relationship between monitored ground-based and satellite aerosol measurements over the City of Johannesburg UR - http://hdl.handle.net/10204/6527 ER -