Development of a Cloud Forecast Scheme for the GL Baseline Global Spectral Model PDF Download
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Author: Kenneth E. Mitchell
Publisher:
ISBN:
Category : Cloud forecasting
Languages : en
Pages : 166
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 1004
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Book Description
Author: Xiaolei Zou
Publisher: Academic Press
ISBN: 0128209534
Category : Science
Languages : en
Pages : 325
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Book Description
Atmospheric Satellite Observations: Variation Assimilation and Quality Assurance provides an invaluable reference for satellite data assimilation. Topics covered include linear algebra, frequently used statistical methods, the interpolation role of function fitting, filtering when dealing with real observations, minimization in data assimilation systems, 3D-Var and the inverse problem it solves, 4D-Var and adjoint techniques, and much more. The book concludes with satellite observation of hurricanes. - Contains mathematical concepts from several branches of study, including calculus, linear algebra, probability theory, functional analysis, and minimization - Illustrates quality assurance for satellite observations using real data examples - Includes a dedicated chapter on how different satellite instruments see hurricanes - Reviews theory, system development, and the numerical experiments of three- and four-dimensional variational data assimilation (3D-Var/4D-Var)
Author: Peter Sloot
Publisher: Springer Science & Business Media
ISBN: 9783540658214
Category : Computers
Languages : en
Pages : 1348
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Book Description
This book constitutes the refereed proceedings of the 7th International Conference on High-Performance Computing and Networking, HPCN Europe 1999, held in Amsterdam, The Netherlands in April 1999. The 115 revised full papers presented were carefully selected from a total of close to 200 conference submissions as well as from submissions for various topical workshops. Also included are 40 selected poster presentations. The conference papers are organized in three tracks: end-user applications of HPCN, computational science, and computer science; additionally there are six sections corresponding to topical workshops.
Author:
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 328
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Book Description
Author:
Publisher:
ISBN:
Category : Environmental geology
Languages : en
Pages : 178
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Author:
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 520
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Book Description
Author: United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Science
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 288
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Author: United States. National Weather Service
Publisher:
ISBN:
Category : Meteorological services
Languages : en
Pages : 38
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Author: Chien-Hsiung Yang
Publisher:
ISBN:
Category : Atmospheric models
Languages : en
Pages : 284
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Book Description
The procedures and results of a study undertaken to evaluate and assess the impacts of three new parameterization schemes for the GL global spectral model as a 3-4 day range forecast model are described. The tree parameterization schemes are one each for the boundary-layer physics, moist convection and heating due to solar and terrestrial radiations. These schemes are incorporated either singly or jointly into a rhomboidal-30, 12-layer global spectral model for four-day simulations using FGGE III- a data as input. Evaluation and assessment are made on the basis of two kinds of global statistics: mean and root-mean-square errors, and on their magnitudes and distributions. The statistics are generated for both the primary, that is, prognostic, variables, and supplementary variables such as zonal-mean and zonal-eddies energy densities. The new moist convection scheme has been found to increase convective activity significantly and maintain it throughout the four-day period. It also warms and dries the middle troposphere, but produces rainfall far in excess of the climatology. The radiation parameterization has been found to cool the atmosphere and reduce its specific humidity. It counterbalances enhanced heating and moistening brought about by the new boundary-layer and moist convection schemes and eliminates the systematic warming of the old model.
Author: Kang Hoh Phua
Publisher: World Scientific
ISBN: 9814555991
Category :
Languages : en
Pages : 496
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Book Description
Supercomputing is a strategic tool for the future. These proceedings examine the most recent advances in effective applications of supercomputing and offer provocative visions of the future. Special focus is given to the spread of applications in both the public and commercial sectors where supercomputing is being increasingly embraced as the ultimate competitive tool in the global arena.
