Articles | Volume 10, issue 4/5
Nonlin. Processes Geophys., 10, 373–383, 2003
https://doi.org/10.5194/npg-10-373-2003
Nonlin. Processes Geophys., 10, 373–383, 2003
https://doi.org/10.5194/npg-10-373-2003

  31 Oct 2003

31 Oct 2003

Linear and nonlinear post-processing of numerically forecasted surface temperature

M. Casaioli1, R. Mantovani2, F. Proietti Scorzoni3, S. Puca3, A. Speranza4, and B. Tirozzi3 M. Casaioli et al.
  • 1Institute of Atmospheric Physics, National Research Council, Rome, Italy
  • 2Physics Department, University, Bologna, Italy
  • 3Physics Department, University “La Sapienza", Rome, Italy
  • 4Mathematics and Informatics Department, University, Camerino, Italy

Abstract. In this paper we test different approaches to the statistical post-processing of gridded numerical surface air temperatures (provided by the European Centre for Medium-Range Weather Forecasts) onto the temperature measured at surface weather stations located in the Italian region of Puglia. We consider simple post-processing techniques, like correction for altitude, linear regression from different input parameters and Kalman filtering, as well as a neural network training procedure, stabilised (i.e. driven into the absolute minimum of the error function over the learning set) by means of a Simulated Annealing method. A comparative analysis of the results shows that the performance with neural networks is the best. It is encouraging for systematic use in meteorological forecast-analysis service operations.