Posts Tagged ‘Cyclone’
Last Updated on Monday, 19 July 2010 10:55 Written by Administrator Monday, 19 July 2010 10:55
Tropical Cyclone and Mid-Latitude Characteristics and Physical Mechanisms Contributing to Extratropical Transition in the Western North Pacific
This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A164783. The abstract provided by the Pentagon follows: This study of extratropical transition (ET) of tropical cyclones (TCs) in the western North Pacific examines 30 cases during 1 June through 31 October 1994-98 using Navy analyses, plus geostationary satellite visible, infrared, water vapor, and microwave imagery. Based on the similarity of all 30 ET cases in satellite imagery, a three-dimensional conceptual model of the transformation stage of ET is proposed to describe how these ET cases evolve into an incipient, baroclinic cyclone. A climatology of ET during the period studied is presented, and three levels of re-intensification (little, moderate, and deep) are defined based on storm intensity at the end of ET. The re- intensification stage in nine cases is studied via Navy Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS) control forecasts, simulations with the initial TC vortex removed, and simulations in which the initial TC vortex is displaced. These COAMPS simulations demonstrate that deep or moderate re- intensification depends on phasing of the poleward translating TC remnants with a critical region in which cyclogenesis is favored in the mid-latitude circulation. The mid-latitude circulation and TC contributions to the re- intensification stage are identified via superposition with the critical region and modification of its location and diagnostic values, respectively, and the combination of these contributions determines the final storm intensity at the end of ET.
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Tags: Characteristics, Contributing, Cyclone, Extratropical, Mechanisms, MidLatitude, North, Pacific, Physical, Transition, Tropical, Western | Posted under Transfection Books | No Comments
Last Updated on Wednesday, 7 July 2010 11:56 Written by Administrator Wednesday, 7 July 2010 11:56
Southern Hemisphere Application of the Systematic Approach to Tropical Cyclone Track Forecasting. Part 1: Environmental Structure Characteristics
This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon and made available for public release. It has been reproduced in the best form available to the Pentagon. It is not spiral-bound, but rather assembled with Velobinding in a soft, white linen cover. The Storming Media report number is A422733. The abstract provided by the Pentagon follows: The environment structure conceptual models of the Systematic Approach to Tropical Cyclone Track Forecasting technique of Carr and Elsberry are applied to all Southern Hemisphere tropical cyclones during January 1994 – June 1997. Whereas three of the four synoptic patterns from the western North Pacific could be applied with relatively small modifications, a new High (H) amplitude synoptic pattern was defined to classify the situations with large meridional penetrations of mid-latitude troughs deep into the Southern Hemisphere tropics. Some changes in terminology were required to describe the synoptic regions that have characteristic track directions. All 1592 cases during the period could be described by these four synoptic patterns and 11 synoptic regions. Important track changes were found to be associated with transitions between these synoptic patterns and regions. Three binary tropical cyclone interactions defined for the Western North Pacific were adapted for use in the Southern Hemisphere with considerable success. A preliminary climatology of occurrences for the synoptic pattern/region combinations, ions, transitions between combinations, and binary tropical cyclone interactions are calculated. Sequences of synoptic analyses related to these transitions are described to aid in the application.
Price: $ 25.95
Tags: Application, Approach, Characteristics, Cyclone, Environmental, Forecasting., Hemisphere, Part, Southern, Structure, Systematic, Track, Tropical | Posted under Transfection Books | No Comments