The Role of Advection in the Formation of Vortex Cloud Patterns


Book Description

A case study of the spiral cloud patterns associated with an atmospheric vortex, as seen by the TIROS I meteorological satellite, shows that advection can be a dominant mechanism in the formation of these patterns. This advection is then interpreted in terms of the horizontal and vertical structure of the low pressure system with which the clouds are associated. A comparison of the vortex cloud patterns, at the time of the maximum development of the spiral clear area, with Bergeron's two common types of cold fronts indicates that these patterns should be attributed to upper-air advection relative to the surface front rather than to vertical motion along the front. The similarities displayed by the spiraling vortex cloud patterns seen by TIROS I would suggest that the features found in this detailed case study would also hold for other cases in which this particular cloud pattern exists. The spiraling vortex patterns can be associated with a low pressure area on the surface analysis, but no general statement can be made that the reverse is also true. This case study indicates that the TIROS pictures are particularly well suited for the study of horizontal advection and show promise of yielding quantitative information. (Author).







Technical Abstract Bulletin


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Snowstorms Along the Northeastern Coast of the United States: 1955 to 1985


Book Description

snowstorms along the Northeastern Coast of the United States: 1955 to 1985 documents 20 of the most crippling snowstorms that have affected the heavily populated coastal region of the Middle Atlantic states and southern New England over the last four decades. Heavy snowfall and high winds associated with storms often referred to as "nor'easters" can maroon millions of people at home or in transit, severely disrupt human services and commerce, and endanger the lives of those who venture out doors. Paul J. Kocin and Louis W. Uccellini provide answers to questions of how these important storms develop, what factors delineate snow/no snow situations, and what weather patterns provide clues that foretell such events. The book provides a comprehensive overview of this phenomenon from historical, climatological, and dynamical perspectives, using many illustrations, maps, tables, and color schematics. The introduction describes the major effects of such storms, the complex physical interactions that fuel their development, and the problems they present to forecasters trying to predict their fickle behavior and progress. A review of the great northeastern storms of the past three centuries follows, along with a climatology of the heavy snow events over a 30-year period. Descriptions of 20 major storms supply a framework for understanding the dynamical and thermodynamical processes that contribute to heavy snowfall. A summary of the physical processes that contribute to the storms concludes with issues that remain to be resolved. The case-study approach presents a great deal of material contained in hundreds of synoptic analyses in a well-organized and useful layout, allowing case-by-case comparisons of common features and differences. Extensive tables, diagrams, and photographs show weather patterns at the surface and aloft, emphasizing cyclone tracks and deepening rates, the contributions of cold surface anticyclones, cold-air damming and coastal frontogenesis, upper-level processes, jet streak circulations, satellite imagery, and three-dimensional air flow. It is hoped that this book will provide a foundation for researchers and students interested in investigating the processes that interact to produce major winter storms. The weather patterns described here provide a first step in the generation of conceptual models, and also serve as an easily referenced guide for forecasters concerned with predicting heavy snowfalls along the northeastern coast of the United States.




History and Progress of AFCRL.


Book Description







Northeast Snowstorms


Book Description

Designed with researchers, students, and weather observers and enthusiasts in mind, Northeast Snowstorms takes the unique approach of utilizing conventional weather charts and detailed descriptions of individual storms to analyze storms in a multi-disciplinary way. The most comprehensive treatment of winter storms ever compiled, this two-volume set includes case studies, insights, historic photos, and 200 color figures. The extra material on the SpringerExtras server contains five days of complete reanalysis data at 35-km grid resolution and 64 vertical levels for each of the cases. This allows everyone from enthusiasts to students to conduct their own diagnostic studies or research projects for any of the 70 historic cases, from a PC or workstation environment. Instructors take note: this is an excellent tool for creating classroom exercises.




Science Abstracts


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