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Navy Atmospheric Boundary Layer (NABL) Model System: Software/Interface Design Document
ST SYSTEMS CORP PACIFIC GROVE CA
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This design documents applies to the Naval Atmospheric Boundary Layer NABL Model Systems which is identified and abbreviated as NABLS. The NABL model was developed to produce short-range 0 to 36 hour forecasts of meteorological conditions in the atmospheric boundary layer. Although NABL is a one-dimensional stick model, it uses turbulence parametrizations and a vertical resolution which are superior to those in the current Navy operational regional and global atmospheric prediction model systems NORAPS and NOGAPS respectively. NABL obtains adiabatic tendencies of temperature and moisture from NORAPS or NOGAPS, giving it three-dimensional character, although NABL does not interact in a two-way sense with either of the larger-scale prediction model systems. NABL has demonstrated superior skill at predicting the vertical structure of temperature and refractivity in the boundary layer. The NABLS will permit a system user to specify where geographically and for what forecast intervals and times the NABL model will be run will cause the requisite initial condition and tendency information from one of the larger-scale models to be made available for input to NABLS and will provide for saving the resultant, high-resolution NABL model output in a convenient formats for use by such other applications external to NABLS which may now or in the future have need for such information.
APPROVED FOR PUBLIC RELEASE