Abstract
Authors have carried out the wind field measurement in Tsukuba area, where is supposed to be flat field with rare topographic ups and downs. Doppler sodar in Building Research Institute(BRI) and anemometers in Meteorological Research Institute(MRI) are used for the measument and the latter is located about 10km to the south of the former. In this study, measurement results on March 3rd through 21th are discussed. As for the wind velocity and direction between two places, it is confirmed that there is a certain correlation. On the vertical profile of the wind velocity, averaged index of the power law in MRI is larger than that in BRI and depends on wind direction. The averaged index from northern wind is larger than that from western wind, which is probably because there is an urban area with middle-rise buildings to the north of MRI, while there is relatively rural distincts to the west of MRI. Cross-correlation coefficients obtained from every ten minutes' index of the power law of the each point result in getting maximum values at timelag of 10 through 20minutes, which means that it is useful to evaluate the profiles by considering wind with time scale of a few ten munites.
