A possible consequence is that the land use of urban areas could be roughly inferred from curve shapes such as Q G account for better the ground composition. On the other hand, hysteresis curves obtained from R represents clearer urban areas or suburban areas under the influence of an urban вЂњplumeвЂќ. In particular, the hysteresis patterns show that Q Hysteresis coefficients were computed for fits of net-radiation against R, From the residuals it seems to be possible to distinguish the urban boundary layer from the suburban boundary layer when plotted as a function of net-radiation. In most cases the estimates of the energy stored in the soil were obtained by assuming roughly a certain type of soil and an effective soil depth. The database includes net-radiation, soil temperature, ground heat flux, and turbulent fluxes. These three forms of energy were observed or estimated from observations taken during Joint Urban 2003 Campaign. ) of urban and suburban areas of Oklahoma City, USA. ), and the residual of the energy partition (R = Q This paper addresses the relation between the net-radiation (Q 7: Maximum UHI strength between 6pm and 0am as function of three different stability parameters (a), as well as average (solid lines) nighttime (6pm-6am) cooling rates and minimum (dashed lines) evening (6pm-0am) cooling rates at the rural (green) and urban (red) sites as function of the maximum evening Richardson number Ri NRMN at the Norman Mesonet site (b).

2004) are also shown, as well as wind speed gradients (d) evaluated using data from the PNNL sodar (Allwine et al. The flux Richardson Number Rifl (b) and shear stress velocity u* (c), both determined from sonic anemometer data measured at 37 m and 80 m height on the TM tower ( Grimmond et al. Our analysis demonstrates that detailed meteorological information can provide new insights into nocturnal mixing processes and related air-quality problems, but the lack of vertical concentration profiles still make it difficult to further study the interplay between the BL structure and air chemistry.).

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