Download or read book Phillips Laboratory Global Spectral Numerical Weather Prediction Model written by Donald C. Norquist and published by . This book was released on 1992 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phillips Laboratory Global Spectral Numerical Weather Prediction Model written by and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phillips Laboratory Global Spectral Numerical Weather Prediction Model written by Donald C. Norquist and published by . This book was released on 1992 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Numerical Weather Prediction Models written by Martin Ehrendorfer and published by SIAM. This book was released on 2012-01-01 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of numerical weather prediction (NWP) focusing on the application of the spectral method in NWP models. The author illustrates the use of the spectral method in theory as well as in its application to building a full prototypical spectral NWP model, from the formulation of continuous model equations through development of their discretized forms to coded statements of the model. The author describes the implementation of a specific model - PEAK (Primitive-Equation Atmospheric Research Model Kernel) - to illustrate the steps needed to construct a global spectral NWP model. The book brings together all the spectral, time, and vertical discretization aspects relevant for such a model. It provides readers with information necessary to construct spectral NWP models; a self-contained, well-documented, coded spectral NWP model; and theoretical and practical exercises, some of which include solutions.
Download or read book Evaluation of NWP and Cloud Forecasts from the Phillips Laboratory Global Spectral Model written by and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diagnosing Cloudiness from Global Numerical Weather Prediction Model Forecasts written by and published by . This book was released on 1994 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cloud Cover Predictions Diagnosed from Global Numerical Weather Prediction Model Forecasts written by Donald C. Norquist and published by . This book was released on 1997 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Research Papers written by and published by . This book was released on with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 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 Performance Statistics Bulletin written by and published by . This book was released on 1992 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cloud Cover Predictions Diagnosed from Global Numerical Weather Prediction Model Forecasts written by Donald C. Norquist and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We developed statistical relationships between fractional cloud cover and a collection of variables drawn from forecast fields from a global numerical weather prediction model. These relationships were then applied to later forecasts from the same weather prediction model to diagnose the cloud cover corresponding to the forecast states. The U.S. Air Force RTNEPH cloud analysis datasets in the Northern Hemisphere for January and July 1991 were used to represent cloud cover in separate winter and summer statistical relationship developments. Forecasts from the Phillips Laboratory Global Spectral Model at times corresponding to the cloud analyses were used to provide the weather model predictors. We used multiple linear regression and a hybrid regression estimation of event possibilities/multiple linear regression to develop the statistical relationships in the 5 percent cloud amount categories from 0 to 100 percent. We used multiple discriminant analysis with six cloud amount categories covering the range from 0 to 100 percent. Separate relationships were developed over 10-day periods for low, middle, and high cloud decks, and total cloud. The relationships developed were also distinct for different forecast durations. All relationships were applied to forecasts initialized on the day following the 10-day development period. Our results showed that multiple linear regression produced forecast diagnoses of cloud amount that were slightly better than the other methods in root-mean-square error. This method also modified the frequency distribution of cloud cover from that of the analysis. The hybrid method improved upon the frequency distribution of clear and overcast, but worsened the near-clear and near-overcast categories. Multiple discriminant analysis produced cloud cover diagnoses with the best combination of root-mean-square skill and preservation of the freque.
Download or read book Systematic Humidity Errors in Numerical Weather Prediction Models written by Donald C. Norquist and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1992 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modifications to the Representation of the Surface Layer Processes in the Phillips Laboratory Global Spectral Model written by and published by . This book was released on 1995 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Retrieval and Analysis of Satellite Data for Numerical Weather Prediction written by and published by . This book was released on 1992 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reports documents the development and testing of an advanced geophysical parameter retrieval, analysis and prediction system for global numerical weather prediction. The additions and improvements to the existing data assimilation system at the Phillips Laboratory are the following: a new surface pressure analysis, modifications for high resolution analysis, an optimal retrieval of SSM/T data based on Bayesian estimation, use of precipitation data to improve the moisture and divergence analysis and as input to a diabatic nonlinear normal mode initialization. The system uses a version of the advanced physics global spectral model of PL. The results of simulation tests show a significant improvement of the moisture analyses, especially in the tropics and Southern Hemisphere, and a smaller, but detectable improvement of the other variables, except in the stratosphere.
Download or read book Monthly Weather Review written by and published by . This book was released on 1993 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference on Numerical Weather Prediction written by and published by . This book was released on 1994 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
