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Physical disaggregation of numerical model rainfall
1Telford Institute of Environmental Systems, School of Environment and Life Sciences, Peel Building, University of Salford, Salford M5 4WT
e-mail for corresponding author: n.i.fox@salford.ac.uk
Abstract. A methodology is presented for the disaggregation of numerical model fields of convective rainfall using a physically based procedure. The scheme uses surface sensible heat flux values derived from high-resolution multichannel satellite radiometer observations. The sensible heat flux values initialise a simple convective model to calculate the convective disaggregation parameter (CDP), which is theoretically proportional to the convective rainfall rate. The CDP diagnostic parameter can be derived as a one-time field if the surface characteristics are invariant, as a seasonal value may be, or it may be evaluated on a case by case basis. Once found, the CDP can be used to disaggregate numerical weather prediction (NWP) convective rainfall fields for as far ahead as such fields are produced.
Final Revised Paper (PDF, 11913 KB)
Citation: Fox, N. I. and Collier, Ch. G.: Physical disaggregation of numerical model rainfall, Hydrol. Earth Syst. Sci., 4, 419-424, 2000. Bibtex EndNote Reference Manager
