|Diurnal Micro Climatic and Solar-Radiation Profile of the Rivers State University Site, Port Harcourt, Nigeria
|EDOKPA Onojiede David & EDE Nwobidi Precious
|This study analyses the surface heat fluxes of the Rivers State University site. Key meteorological variables such as solar insolation were sourced from an automatic weather station within the study environment for one year. Results showed that mean diurnal values for sensible, latent, ground heat fluxes were 40 W1m2, 20 W1m2 and 60 W1m2 respectively. Diurnal net radiation flux range was 0.1 - 427 W1m2 with a mean solar insolation peak of 287 W1m2at 12:00 noon. Mean surface reflection was 26 W1m2 with a Bowen ratio of 1.2. Air mixing ratio ranged from 21 28 g1kg with minimal surface layer turbulence. Mean energy content of ambient atmosphere that instigates air instability was 92 W1m2. Mean ambient air temperature of 30 oC showed that the environment is humid and capable of retaining heat for longer period of time with positive sensible heat flux. Dispersive potential of the atmosphere is below moderate and will slowly disperse emissions introduced to it. However, with the environment being dominated by mixed turbulence, dispersion will be moderate in worst case pollution scenarios. It is recommended that the environment maintains open spaces in order to moderate the interferences of energy fluxes that could enhance heat stress.
|Rivers State University, Solar Radiation, Heat Fluxes, Atmospheric Boundary Layer, Turbulence