Abstract
The surface of the Earth, and bodies on it such as buildings and agricultural properties, radiate energy into the sky at a rate which depends on a number of factors. One of these factors, which is particularly significant, is the equivalent temperature of the sky. Here, we wish to discuss a pilot study of the magnitude of changes in the equivalent temperature of the clear sky as the observation location is changed on a local, neighbourhood, scale. In this study, measurements were made mainly in the southern suburbs of the Adelaide metropolitan area.