摘要: The atmospheric processes governing the conditions in urban areas take place on scales between mesoscale and microscale. Although main interest bears primarily lowest part of atmosphere as small 50 m, scale cannot general be considered isolated microscale processes. This is mainly because city structures generate motions at large whole area itself. Recently Thunis Bornstein (1996) defined a new called meso-δ (200 m to 2 km), which fits boundary layer.