Search Results

You are looking at 111 - 120 of 38,777 items for :

  • Boundary conditions x
  • All content x
Clear All
Peter C. Chu, Yuchun Chen, and Shihua Lu

is to separate the solar radiation from the net downward flux (e.g., Blumberg and Mellor 1987 ) Q = R S + Q̃ ,   Q̃ ≡ −( R b + Q H + Q E ) (5) and to replace Q by Q̃ in the gradient-type surface boundary condition Q̃ = κ Δ T 1 (6) and the restoring-type surface boundary condition Q̃ = κ Δ T 2 . (7) We call Q the net downward heat flux with solar radiation, and Q̃ the downward heat flux without solar radiation. Since the Haney-type boundary conditions have been used by the

Full access
Dimitrios Melas, Alfredo Lavagnini, and Anna-Maria Sempreviva

, Enger 1990 ; Enger et al. 1993 ; Melas et al. 1995 , 1998a , b ). In this study, model results are compared with measurements taken at a number of near-surface wind stations and rawinsonde profiles at Cagliari airport. The study focuses on the average characteristics of the wind field and boundary layer structure during summer conditions with weak synoptic forcing and clear skies. The area and the measurements Sardinia is the second largest island in the Mediterranean at about 267 km long and 120

Full access
John M. Klinck

1174 JOURNAL OF PHYSICAL OCEANOGRAPHY VOLUME25Thermohaline Structure of an Eddy-Resolving North Atlantic Model: The Influence of Boundary Conditions JOHN M. KLINCKCenter for Coastal Physical Oceanography, Department of Oceanography, Old Dominion University, Norfolk, Virginia(Manuscript received 13 July 1993, in final form 15 September 1994) A T-S volumetric census

Full access
Philippe Marbaix, Hubert Gallée, Olivier Brasseur, and Jean-Pascal van Ypersele

1. Introduction The technique of “nesting” a high-resolution limited area model within a general circulation model is widely used, specifically for the purpose of climate simulation ( Houghton et al. 2001 , chapter 10). This implies that large-scale (LS) atmospheric conditions must be provided to a regional climate model (RCM), and that spurious interactions between the model solution and the lateral boundaries must be avoided. Solving the problem of boundary conditions is not straightforward

Full access
Isaac Ginis, Alexander P. Khain, and Elena Morozovsky

procedure, we apply (1)–(2) to the continuity equation written as div V = 0, where V = ( u, υ, w ) is the velocity vector. Assuming periodic boundary conditions along the x axis, we can obtain two 2D continuity equations—one for the background flow velocity components in the y – z plane and one for the velocity perturbations in the x – z plane: In Eq. (3) υ and w are the horizontal and vertical components of the background flow velocity. In the derivation of Eq. (4) it is assumed

Full access
Eytan Rocheta, Jason P. Evans, and Ashish Sharma

1. Introduction Climate change impact assessment can use regional climate models (RCMs) to provide higher-resolution projections than available from global climate models (GCMs). RCMs are driven by large-scale circulation patterns from the GCM being transferred through lateral boundary conditions (LBCs), as well as specified initial conditions and lower boundaries. As these models are driven by coarse-scale GCM data, they are dependent on the provision of realistic simulations of the global

Full access
Bosong Zhang, Brian J. Soden, Gabriel A. Vecchi, and Wenchang Yang

1. Introduction Convective aggregation has been extensively studied in idealized numerical simulations, in which randomly distributed convective systems can spontaneously organize into one or several isolated clusters under highly idealized boundary conditions. Previous studies have demonstrated that radiative feedbacks can play an important role in the development of organized convection ( Bretherton et al. 2005 ; Emanuel et al. 2014 ; Holloway and Woolnough 2016 ; Muller and Bony 2015

Restricted access
Kenneth L. Calder

616 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUm;24Concerning Similarity Analysis Based on the Use of Governing Equations and Boundary Conditions and Long's Method of Generalized Dimensional Analysis KENNETH L. CALDER Department of Army, Fort Detrick, Frederick, Md.(Manuscript received 20 March 1967, in revised form 2 August 1967)ABSTRACT Long has illustrated the increased power for fluid

Full access
Chaing Chen

unique application of grid-nesting techniques to the time-splitting elastic model.To minimize the wave reflection along the lateral and the upper boundaries of the nested fine-grid model,the conventional nested-grid scheme has been modified so that the fine-grid model has its own "independent"radiative boundary conditions as well as "dependent" nested boundary conditions. Tbis modification is crucialto the success of nested grid simulations.A simulation of the 10-rn-high Witch of Agnesi Mountain

Full access

340 MONTHLY WEATHER RE.VIEW VOLUMEI!?The Influence of One-Way Interacting Lateral Boundary Conditions upon Predictability of Flow in Bounded Numerical Models TOMISLAVA VUKICEVIC AND JAN PAEGLEDepartment of Meteorology, University of Utah. Salt Lake City, Utah(Manuscript received 14 January 1988, in final form 22 July 1988)ABSTRACT The influence of one-way interacting lateral

Full access