An empirical model was developed for prediction of the cooling effect inside the sites, based on the statistical analysis carried out on the 714 experimental observations gathered each hour from the sites.
The following effects were found to be statistically significant. They are of special interest for the design of small urban green habitats.
The background effect. The cooling effect in a wooded site was found to depend, among other factors, on the air temperature of its background outside the site. The higher this temperature, the stronger the cooing effect. Thus, we would expect a much stronger cooing effect of about 6 K in a typical garden in the southern part of Israel (say at eilat), as against 2.8 K in the tel-aviv region.