This research intends to investigate the cross spectrum characteristics of wind pressure
fluctuations on the surface along the meridian of domed roofs under turbulent wind flows.
Wind pressure experiments of domed roofs are conducted considering two roof curvatures
and three heights of side walls. From the experimental results, various distribution types of
co-coherences are examined and the traditional exponential decaying form is shown
insufficient to approximate the general characteristics of co-coherences. By combining the
proposed models by Uematsu et al  and Kanda et al  and also a phase shift parameter
included, the approximation model is then improved to represent the observed coherences