Download or read book A Report on Experiments with the AFGWC Boundary Layer Model written by Chien-Hsiung Yang and published by . This book was released on 1978 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were carried out to find means of improving the forecast performance of the Air Force Global Weather Central (AFGWC) Boundary Layer Model. The results suggest that modifications in the methods of estimating eddy diffusivity and surface specific humidity may yield a slight improvement in the forecast accuracy while requiring less computation. It is also demonstrated that doubling the time step from 30 to 60 min does not significantly degrade the forecast accuracy. Suggestions on further modifications under less restrictive operational conditions are also included. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Air Force Surveys in Geophysics written by and published by . This book was released on 1978 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report on Research at AFCRL written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1976 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Facsimile Products written by United States. National Weather Service and published by . This book was released on 1979 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Cloud Forecast Scheme for the GL Baseline Global Spectral Model written by Kenneth E. Mitchell and published by . This book was released on 1989 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using forecast relative humidity (RH) from a global model, several pre-existing diagnostic RH-to-cloud schemes were tested to forecast global fractional cloud cover in a postprocessor format. Since none of the schemes tested provided a superior cloud forecast when compared to Air Force Global Weather Central's (AFGWC) operational 5LAYER cloud forecasts, a new RH-to-cloud scheme was developed by relating cumulative frequencies of forecast RH to cumulative frequencies of analyzed cloud cover from the AFGWC RTNEPH cloud analysis. This scheme creates a series of forecast time-dependent RH-to-cloud curves that can be temporally updated to account for changes in season, cloud analysis, or forecast model, The global model used was a spectral-type developed by the Geophysics Laboratory (GL) using parameterized diabatic physics presently incorporated in the operational GSM (global spectral model) at AFGWC.

Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1992 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Proposed Procedure for Diagnosis and Improvement of Dynamical Prediction Models written by Chien-Hsiung Yang and published by . This book was released on 1976 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report lays a logical foundation on which deficiencies of dynamical prediction models can be defined and dealt with on a rational basis. Measures of the quality of performance of dynamical prediction models are suggested, and a procedure with which deficiencies of the models can be diagnosed is proposed. A sample study is used to illustrate the use of the proposed procedure, and the results of the study are presented. (Author).

Download or read book The Planetary Boundary Layer written by CAS Working Group on Atmospheric Boundary-layer Problems and published by . This book was released on 1979 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Error of Discretization in the Air Force Global Weather Central Boundary Layer Model written by Chien-Hsiung Yang and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The computational structure in the vertical of the Air Force Global Weather Central Boundary Layer Model is analyzed. The approach used is to measure the degree of inaccuracy in the numerical solution of a time-dependent problem by the error of the steady-state solution incurred through discretization procedures. It is found that the present structure contains defects that are amenable to improvements that can be implemented without a substantial increase in computational effort.

Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Book catalog of the Library and Information Services Division written by Environmental Science Information Center. Library and Information Services Division and published by . This book was released on 1977 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Book Catalog of the Library and Information Services Division Subject index written by Environmental Science Information Center. Library and Information Services Division and published by . This book was released on 1977 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical note written by and published by . This book was released on 1979 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book WMO OMM VMO written by and published by . This book was released on 1951* with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: