Insensitivity of the Nonlinear Normal Mode Initialization of a Limited Area Model to the Inclusion of Nonstationary Rossby Modes

1989 ◽  
Vol 117 (9) ◽  
pp. 2011-2018 ◽  
Author(s):  
S. J. Bijlsma
Keyword(s):  
Normal Mode ◽  
Limited Area ◽  
Nonlinear Normal Mode ◽  
Limited Area Model ◽  
Area Model ◽  
Nonlinear Normal ◽  
Normal Mode Initialization

scholarly journals IMPLICIT NONLINEAR NORMAL MODE INITIALIZATION FOR A BAROTROPIC PRIMITIVE EQUATION LIMITED AREA MODEL

MAUSAM ◽  
2021 ◽  
Vol 44 (1) ◽  
pp. 1-8
Author(s):  
D. R. C. NAIR ◽  
B. CHAKRAVARTY ◽  
P. NIYOGI
Keyword(s):  
Normal Mode ◽  
Shallow Water Equations ◽  
Equation Model ◽  
Limited Area ◽  
Nonlinear Normal Mode ◽  
Model Formulation ◽  
Primitive Equation ◽  
Level Model ◽  
Nonlinear Normal ◽  
Normal Mode Initialization

 A simple version of implicit nonlinear normal mode initialization is applied to a limited area one-level primitive equation model over a tropical domain. The model formulation is based on shallow water equations in spherical co-ordinate and potential enstrophy conserving finite difference scheme is employed. The model is used for predicting the movement of a typical monsoon depression formed over the Bay of Bengal. The above scheme is found to be very effective as it requires only three iterations for attaining balance between the mass and wind tields. However this model is not able to predict the movement of the depression very ac-curately due to the limitations of such a one-level model.

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