Abstract
Abstract Microclimate refers to the climate near the ground. Small-scale localized climates are affected greatly by the nature of the underlying surface and its thermal characteristics. The purpose of this microclimatic study is to examine comparative temperatures measured over different surfaces in an urban campus setting in Indianapolis, Indiana. Surface and air temepratures were sampled using an aspirating psychrometer and surface temperature probe. Observations were taken at two-hour intervals of the diurnal variation over five different surfaces—natural grass, bare ground (soil), gravel parking lot, concrete sidewalk, and blacktop parking lot. The warmest air temperatures were found over the artificial paved surfaces (blacktop and concrete) while the coolest readings occurred over the natural grass. Grass initially exhibited the warmest surface temperatures during the morning hours, but rapid cooling after the peak in solar radiation caused the natural grass to become coolest through the afternoon.
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