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The Application Of Doubly Truncated Hydrometeor Distributions To Numerical Cloud Models
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Book Synopsis The Application of Doubly-truncated Hydrometeor Distributions to Numerical Cloud Models by : Robert O. Berthel
Download or read book The Application of Doubly-truncated Hydrometeor Distributions to Numerical Cloud Models written by Robert O. Berthel and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of meteorological applications involving clouds require being able to determine a reasonable hydrometeor particle size distribution when given the mean hydrometeor mass density ('liquid-' or 'ice-water content') over a region of space. Such applications include numerical cloud model with 'parameterized' or 'bulk' microphysics, which have often assumed exponential size distributions. This study proposes a parameterization scheme based on a doubly-truncated exponential particle size distribution, i.e. a distribution that is truncated at both the large and small diameter ends. The necessary inputs to the scheme are the liquid or ice water content and the temperature of the sample, and, in some circumstances, and estimate of the lower truncation limit. Outputs include the parameters of the exponential distribution, including the upper truncation limit. A special set of relationships is used for rain when the largest particles exceed the assumed breakup diameter of 6 mm. The scheme relies on theoretical relationships derived from the equation for the double-truncated distribution, and on empirically-derived relationships. The empirical expressions include relationship between M and Z (where M is the liquid or ice water content and Z is the radar reflectivity) and values for the product Lambda D sum M (where Lambda is the parameter of the exponential distribution and D sub M is the upper truncation limit).
Book Synopsis The Application of Doubly-truncated Hydrometeor Distributions to Numerical Cloud Models by : Robert O. Berthel
Download or read book The Application of Doubly-truncated Hydrometeor Distributions to Numerical Cloud Models written by Robert O. Berthel and published by . This book was released on 1987 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Application of Doubly-truncated Hydrometeor Distributions to Numerical Cloud Models by : Robert O. Berthel
Download or read book The Application of Doubly-truncated Hydrometeor Distributions to Numerical Cloud Models written by Robert O. Berthel and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of meteorological applications involving clouds require being able to determine a reasonable hydrometeor particle size distribution when given the mean hydrometeor mass density ('liquid-' or 'ice-water content') over a region of space. Such applications include numerical cloud model with 'parameterized' or 'bulk' microphysics, which have often assumed exponential size distributions. This study proposes a parameterization scheme based on a doubly-truncated exponential particle size distribution, i.e. a distribution that is truncated at both the large and small diameter ends. The necessary inputs to the scheme are the liquid or ice water content and the temperature of the sample, and, in some circumstances, and estimate of the lower truncation limit. Outputs include the parameters of the exponential distribution, including the upper truncation limit. A special set of relationships is used for rain when the largest particles exceed the assumed breakup diameter of 6 mm. The scheme relies on theoretical relationships derived from the equation for the double-truncated distribution, and on empirically-derived relationships. The empirical expressions include relationship between M and Z (where M is the liquid or ice water content and Z is the radar reflectivity) and values for the product Lambda D sum M (where Lambda is the parameter of the exponential distribution and D sub M is the upper truncation limit).
Book Synopsis Technical Reports Awareness Circular : TRAC. by :
Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1987-12 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Meteorological and Geoastrophysical Abstracts by :
Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1988 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 964 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.
Book Synopsis Implications of the Khrgian-Mazin Distribution Function for Water Clouds and Distribution Consistencies with Aerosols and Rain by : V. G. Plank
Download or read book Implications of the Khrgian-Mazin Distribution Function for Water Clouds and Distribution Consistencies with Aerosols and Rain written by V. G. Plank and published by . This book was released on 1991 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1988 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Research Papers by : U.S. Air Force Geophysics Laboratory
Download or read book Environmental Research Papers written by U.S. Air Force Geophysics Laboratory and published by . This book was released on with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Conference on Radar Meteorology by :
Download or read book International Conference on Radar Meteorology written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1988 with total page 1600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 10th International Cloud Physics Conference Preprints by :
Download or read book 10th International Cloud Physics Conference Preprints written by and published by Selbstverlag Des Deutschen Wetterdienstes. This book was released on 1988 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preprints of Papers written by and published by . This book was released on 1986 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physical Processes in Clouds and Cloud Modeling by : Alexander P. Khain
Download or read book Physical Processes in Clouds and Cloud Modeling written by Alexander P. Khain and published by Cambridge University Press. This book was released on 2018-07-05 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive analysis of modern theories of cloud microphysical processes and their representation in numerical cloud models.
Book Synopsis Hydrometeor Data and Analytical-theoretical Investigations Pertaining to the SAMS Rain Erosion Program of the 1972-73 Season at Wallops Island, Virginia by : V. G. Plank
Download or read book Hydrometeor Data and Analytical-theoretical Investigations Pertaining to the SAMS Rain Erosion Program of the 1972-73 Season at Wallops Island, Virginia written by V. G. Plank and published by . This book was released on 1977 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar, aircraft, and surface measurement information is presented concerning the liquid-water-content values and size distribution properties of the hydrometeors that existed along the trajectory paths of the four SAMS missiles that were fired into Wallops storm during the 1972-73 season.
Book Synopsis A Model for the Estimation of Rain Distributions by : Robert O. Berthel
Download or read book A Model for the Estimation of Rain Distributions written by Robert O. Berthel and published by . This book was released on 1983 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adverse attenuation effects caused by rain or snow on electro-optical weapons and communication systems are important considerations in any military operation. Attenuation is a function of the E-O wavelength and the number, size, and type of precipitation or cloud particles. The amount (liquid-water-content) and type of precipitation in any given area may be predicted by meteorological modeling techniques or inferred through remote sensing, yet neither method currently has the ability to define the distribution parameters (numbers and sizes) of the precipitating particles. This report describes the development of a model that may be used to estimate the parameters of precipitable rain distributions from inputs of liquid-water-content and/or measurements of radar reflectivity coupled with standardized cloud physics relationships. The model is developed from an equation set based on an exponential distribution function. Aircraft-acquired data are used to verify the conformity of rain distributions to exponential shapes. Empirical relationships provided by these data verified the existence of a nondimensional predictable entity (Lambda D sub M = distribution slope times maximum drop size), which provides improved estimates of rain distributions from predicted or measured values of liquid-water-content and radar reflectivity. Tables listing the variations in the size distributions during three rain situations are given in Appendix A.