EFFECT OF LAND USE/ LAND COVERS CHANGE ON RADAR REFLECTIVITY BASED CONVECTIVE PRECIPITATION IN SOUTH FLORIDA
Frequency and magnitudes of seventeen years (1996-2012) of high resolution radar reflectivity data from Miami station (KAMX) for three afternoon hours of summer months: June, July, and August are analyzed. Reflectivity values≥40 dBZ are selected, because 40 dBZ is considered as the most common reflectivity threshold for convective rain. Synoptically active weather days are removed from the analysis so that any change in thunderstorms pattern through time and space reflects only the effects of surface induced convection. Land use/ land cover change of south Florida during the same temporal range as of radar data and a comparative analysis thereafter indicates that medium and high intensity developed urban covers tend to enhance the convective activity, hence increasing the frequency and intensity of thunderstorms.