Using the observational data over transition zone between urban and rural areas in the basin of the Yellow River(Lanzhou) valley, the characteristics of boundary layer and the heat advection were analyzed.The analysis shows: (1) nocturnal heat island circle is distinct, while it is obscure in daytime;(2) there is strong cool advection below highs of 200 m, while the weak warm advection between the heights of 250 m and 400 m.The heat advection have significantly influence on the temperature and stratification of boundary layer;(3) the height of nocturnal boundary layer retrieved from sodar facsimile is corresponding to the height of Ri<1.0%, there="" are="" inversion="" and="" strong="" wind="" shear="" in="" this="" layer.the="" complex="" underlying="" surface="" and="" terrain="" result="" in="" increasing="" and="" decreasing="" of="" the="" nocturnal="" boundary="" layer="" periodically="" and="" the="" period="" is="" about="" three="" hours.="">
王开存;陈长和;张镭;张文煜.
Observational Study on Character of Boundary Layer andLow-Level Tempearture Advection over TransitionZone between Urban and Rural. Plateau Meteorology. 2004, 23(4): 529-533