Extended Abstract (188K)P4.4
One-column simulations of the Stable Boundary Layer observed during SABLES 98. Importance of the surface fluxes and the dynamic forcings.
Laura Conangla, Universitat Politecnica de Catalunya, Barcelona, Spain; and J. Cuxart and E. Terradellas
In September 1998, an experimental campaign (SABLES 98) aimed to study the Stable PBL at mid-latitudes was held in the northern spanish plateau. A week of good conditions was measured, using a 100 meter tower and captive balloons.
In this work 7 nights are simulated with a TKE model, using the sounding profiles for initialisation and validation. The dynamic forcings are obtained from the spanish operational mesoscale model, HIRLAM. A module allowing to introduce local effects has been developed, and it is used to evaluate the effects of drainage flows.
The vertical structure of the turbulence is studied using the turbulence measurements of the tower for validation. Important points that the model is able to reproduce are the intermitency of the turbulence and the presence of the low-level jet. The adequation of the current similarity theory proposals for the SBL is checked.
Poster Session 4, Stable BLs; Chemistry and Dispersion in the ABL
Tuesday, 16 July 2002, 2:00 PM-2:00 PM
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