Original Research Papers
Variational data assimilation with moist threshold processes using the NMC spectral model
Authors:
- Xiaolei ZouEmail Xiaolei Zou
- I. M. Navon
- J. G. Sela
Abstract
This paper describes a detailed study of variational 4-D data assimilation including the physical processes of large-scale precipitation and deep cumulus convection. The length of the assimilation window is 6 h, and the data are NMC's operational analyses. A comparison of the minimization behaviour, the computational complexity, the quality of the retrieved initial state, with and without physical processes is presented. The results demonstrate the ability to perform 4-D variational data assimilation with discontinuous physical processes. The experiments are carried out with the NMC global spectral model in a resolution of 18 layers in the vertical and a 40 wave triangular truncation.
- Year: 1993
- Volume: 45 Issue: 5
- Page/Article: 370-387
- DOI: 10.3402/tellusa.v45i5.14900
- Submitted on 2 Oct 1992
- Accepted on 9 Feb 1993
- Published on 1 Jan 1993
- Peer Reviewed