Abstract: A system of equations governing the behavior of a physical model of the atmospheric, planetary boundary layer was formulated for solution on a digital computer. The physical-numerical model was designed to permit the ...

Abstract: Work published in 1968 by Crowley is adapted to study the truncation error associated with the semimomentum scheme for approximating advection. The results indicate that higher order approximations based on the semimomentum ...

Abstract: It is shown by elementary analysis that the two-step Lax-Wendroff method for integrating the advection equation is subject to nonlinear computational instability. The source of the instability lies in the possibility of ...

Abstract: Gandin and Murphy introduced an ?equitable skill score? for use in evaluating categorical forecasts. For forecasts involving more than two categories, the elements of the scoring matrix are not defined uniquely. In this ...

Abstract: A limited area, fine-mesh, primitive equation barotropic model has been integrated using data observed at 500 mb. The lateral boundary conditions used in the model required that no change occur on the boundary during the ...

Abstract: A new scheme is presented for the numerical integration of the quasi-static system of hydrodynamical equations. The main advantage of the proposed method is its efficiency for the economical production of short-range, ...

Abstract: A rather general theory of nonlinear computational stability is reported. Instability is caused by both spatial and temporal high frequencies that, if not present initially, will appear from nonlinear interactions. It ...

Abstract: A new method is presented for obtaining the numerical solution of the production-dissipation component of the turbulent kinetic energy equation that arises in the Mellor-Yamada level 2.5 turbulent closure model. The ...

Abstract: Second- and fourth-order accurate finite-difference approximations of the equations governing a free surface autobarotropic fluid are compared with each other and with a second-order approximation on a one-half mesh. It ...

Abstract: Analyses and forecasts for the first 2 weeks of the Genesis of Atlantic Lows Experiment (GALE) are described. These fields were produced using the National Meteorological Center (NMC) Regional Analysis and Forecast System ...