An Updated Method for Estimating of Surface-Layer Scaling Parameters from Routine Ground-Based Meteorological Data

摘要

There is presented a method for rough estimation of Monin-Obukhov length from meteorological measurements made routinely in ground-based stations. The independent variables are wind velocity, cloud amount and solar elevation. The method is based on bilateral relations of Pasquill stability classes with (1) wind and insolation and with (2) surface roughness and Monin-Obukhov length on the other hand. The result enables us to build up entire surface-layer scaling for a local dispersion model. Resulting atmospheric stratification estimations are vali-dated in a case study based on radiosounding profiles and mast data collected during 3 years in Tallinn, Estonia.