Download or read book On the Origin of Asymmetric Dynamical Processes and Their Relation to the Structure and Intensity Change of Hurricanes a Diagnostic Study written by Konstantinos Menelaou and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "To a first approximation hurricanes can be considered as axisymmetric vor- tices. However, asymmetries often accompany the symmetric circulation. Spiral rainbands, elliptical eyewalls, polygonal eyewalls, secondary eyewalls, mesovortices, and deep rotating convective clouds are examples of such asym- metric structures. The contribution of these asymmetries to the intensity and structural changes of hurricanes are not well understood.In this thesis, a suite of numerical models (both two dimensional [2D] and three dimensional [3D]) along with a series of diagnostic tools (Empirical Normal Mode [ENM] method, linear eigenmode analysis, wave activities con- servations laws, Eliassen-Palm [EP] flux calculations, and eddy kinetic energy budget calculations), are used to study the underlying dynamics associated with: the lifetime of elliptical eyewalls (Chapter 2), the genesis of secondary eyewalls (Chapter 2,3), the origin of polygonal eyewalls and mesovortices and their contribution to the rapid intensification process (Chapter 4), and finally the role of asymmetric convective bursts to the intensification of developing hurricanes (Chapter 5). In Chapter 2, it is shown that the evolution and the lifetime of a 2D el- liptical eyewall may be controlled by the inviscid damping of sheared vortex Rossby waves (VRWs) or the decay of an excited quasimode. In the context of 2D vortex flows, it is also shown that secondary rings of enhanced vorticity (secondary eyewalls) can form by the radiation of VRWs that result from the release of barotropic instability, and the process of wave-mean flow in- teractions. In Chapter 3, the importance of VRWs to the secondary eyewall genesis is verified in a successful numerical simulation of hurricane Wilma (2005) that developed a secondary eyewall. In Chapter 4, an analysis of the simulated Wilma during the rapid intensification stage is performed to show that the observed polygonal eyewall in Wilma is the result of counterpropa- gating unstable VRWs. The analysis also indicates that the polygonal eyewall and mesovortices can assist in the rapid intensification process. Finally, in Chapter 5 it is shown that the response of a weak vortex to asymmetric con- vective bursts is dominated by the excitation of damped sheared VRWs that act to accelerate the symmetric flow through the radial transport of angular momentum." --
Download or read book Recent Hurricane Research written by Anthony Lupo and published by BoD – Books on Demand. This book was released on 2011-04-19 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents recent research on tropical cyclones and their impact, and a wide range of topics are covered. An updated global climatology is presented, including the global occurrence of tropical cyclones and the terrestrial factors that may contribute to the variability and long-term trends in their occurrence. Research also examines long term trends in tropical cyclone occurrences and intensity as related to solar activity, while other research discusses the impact climate change may have on these storms. The dynamics and structure of tropical cyclones are studied, with traditional diagnostics employed to examine these as well as more modern approaches in examining their thermodynamics. The book aptly demonstrates how new research into short-range forecasting of tropical cyclone tracks and intensities using satellite information has led to significant improvements. In looking at societal and ecological risks, and damage assessment, authors investigate the use of technology for anticipating, and later evaluating, the amount of damage that is done to human society, watersheds, and forests by land-falling storms. The economic and ecological vulnerability of coastal regions are also studied and are supported by case studies which examine the potential hazards related to the evacuation of populated areas, including medical facilities. These studies provide decision makers with a potential basis for developing improved evacuation techniques.
Download or read book Dynamical Studies in Hurricane Intensity Change written by Michael T. Montgomery and published by . This book was released on 1994 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: My research objective is to objective to elucidate and quantify a variety of dynamical processes believed important in hurricane intensity change. As a continuation of my collaboration with scientists at the Hurricane Research Division in Miami, the asymmetric stability problem for rapidly rotating vortices has recently been examined within the framework of asymmetric balance (AB) theory. In this paper the theorem of Charney and Stern is generalized to cover rapidly rotating (i.e. large Rossby number) baroclinic vortices. The theory is applied to observational data from hurricane Gloria of 1985, and Gloria is shown to satisfy the necessary condition for exponential instability. In order to determine whether such instabilities are realized and what role they may play in intensification cycles of hurricanes, a complete eigenvalue analysis is planned for the upcoming year.
Download or read book Hurricanes and Climate Change written by James B. Elsner and published by Springer Science & Business Media. This book was released on 2010-09-02 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hurricanes are nature’s most destructive agents. Widespread interest surrounds the possibility that they might get even more destructive in the future. Policy makers consider it a call for action. Answers about when and by how much hurricanes will change are sought by financial institutions especially industry. And scientists are challenged by the range and interactions of the processes involved. This book, arising from the 2nd International Summit on Hurricanes and Climate Change, contains new research on topics related to hurricanes and climate change since the 1st Summit. Chapters are grouped into research studies using global climate models and those taking empirical and statistical approaches. The latter include investigations of basin-wide and regional hurricane activity.
Download or read book Hurricanes and Climate Change written by Jennifer M. Collins and published by Springer. This book was released on 2017-02-20 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides research that shows tropical cyclones are more powerful than in the past with the most dramatic increases occurring over the North Atlantic and with the strongest hurricanes. Although such increases are correlated with warming oceans and are consistent with the thermodynamic theory of hurricane intensity, there remains doubt about the interpretation, integrity, and meaning of these results. Arising from the 5th International Summit on Hurricanes and Climate Change, this book contains new research on topics related to hurricanes and climate change. Bringing together international leading academics and researchers on various sides of the debate, the book discusses new research and expresses opinions about what is happening and what might happen in the future with regard to regional and global hurricane (tropical cyclone) activity.
Download or read book Hurricanes and Climate Change written by James B. Elsner and published by Springer Science & Business Media. This book was released on 2010-01-23 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies suggest that tropical cyclones are more powerful than in the past with the most dramatic increase in the North Atlantic. The increase is correlated with an increase in ocean temperature. A debate concerns the nature of these increases with some scientists attributing them to a natural climate fluctuation and others suggesting climate change related to anthropogenic increases in forcing from greenhouse gases. A Summit on Hurricanes and Climate Change was held during the spring of 2007 on the island of Crete that brought together leading academics and researchers on both sides of the scientific debate to discuss new research and express opinions about what will happen in the future with regard to hurricane activity. This proceedings volume highlights the state-of-the-science research into various aspects of the hurricane-climate connection. It is likely that the science presented here will lead to new research that will help answer crucial questions about our sustainable future.
Download or read book Diagnostic Study of Hurricane Asymmetries Using Empirical Normal Modes written by Yosvany H. Martinez and published by . This book was released on 2008 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highlights in Helioclimatology written by Jorge A. Perez-Peraza and published by Elsevier. This book was released on 2012-07-16 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines scientific evidence related to influence of solar activity on climate and resulting atmospheric process that creates hurricanes. Provides tools in hurricane prediction. Aides readers in understanding tropical storm, hurricane genesis, intensification, prediction, excellent introduction to spectral analysis.
Download or read book Hurricanes and Typhoons written by Richard J. Murnane and published by Columbia University Press. This book was released on 2004-12-01 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book surveys the past, present, and potential future variability of hurricanes and typhoons on a variety of timescales using newly developed approaches based on geological and archival records, in addition to more traditional approaches based on the analysis of the historical record of tropical cyclone tracks. A unique aspect of the book is that it provides an overview of the developing field of paleotempestology, which uses geological, biological, and documentary evidence to reconstruct prehistoric changes in hurricane landfall. The book also presents a particularly wide sampling of ongoing efforts to extend the best track data sets using historical material from many sources, including Chinese archives, British naval logbooks, Spanish colonial records, and early diaries from South Carolina. The book will be of particular interest to tropical meteorologists, geologists, and climatologists as well as to the catastrophe reinsurance industry, graduate students in meteorology, and public employees active in planning and emergency management.
Download or read book Anatomy of a Hurricane written by Terri Dougherty and published by Capstone. This book was released on 2010-07 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Describes how hurricanes form, how scientists study them, and how people can protect against their destruction"--Provided by publisher.
Download or read book Hurricanes of the North Atlantic written by James B. Elsner and published by Oxford University Press. This book was released on 1999-06-10 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Called the greatest storms on the planet, hurricanes of the North Atlantic Ocean often cause tremendous social and economic upheaval in the United States, Mexico, and the Caribbean. And with the increasing development of coastal areas, the impact of these storms will likely increase. This book provides a comprehensive analysis of North Atlantic hurricanes and what they mean to society. It is intended as an intermediary between hurricane climate research and the users of hurricane information. Topics include the climatology of tropical cyclones in general and those of the North Atlantic in particular; the major North Atlantic hurricanes, focusing on U.S. landfalling storms; the prediction models used in forecasting; and societal vulnerability to hurricanes, including ideas for modeling the relationship between climatological data and analysis in the social and economic sciences.
Download or read book Hurricanes and Climate Change written by James B. Elsner and published by Springer. This book was released on 2008-11-26 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies suggest that tropical cyclones are more powerful than in the past with the most dramatic increase in the North Atlantic. The increase is correlated with an increase in ocean temperature. A debate concerns the nature of these increases with some scientists attributing them to a natural climate fluctuation and others suggesting climate change related to anthropogenic increases in forcing from greenhouse gases. A Summit on Hurricanes and Climate Change was held during the spring of 2007 on the island of Crete that brought together leading academics and researchers on both sides of the scientific debate to discuss new research and express opinions about what will happen in the future with regard to hurricane activity. This proceedings volume highlights the state-of-the-science research into various aspects of the hurricane-climate connection. It is likely that the science presented here will lead to new research that will help answer crucial questions about our sustainable future.
Download or read book Recent Hurricane Research written by Anthony Lupo and published by IntechOpen. This book was released on 2011-04-19 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents recent research on tropical cyclones and their impact, and a wide range of topics are covered. An updated global climatology is presented, including the global occurrence of tropical cyclones and the terrestrial factors that may contribute to the variability and long-term trends in their occurrence. Research also examines long term trends in tropical cyclone occurrences and intensity as related to solar activity, while other research discusses the impact climate change may have on these storms. The dynamics and structure of tropical cyclones are studied, with traditional diagnostics employed to examine these as well as more modern approaches in examining their thermodynamics. The book aptly demonstrates how new research into short-range forecasting of tropical cyclone tracks and intensities using satellite information has led to significant improvements. In looking at societal and ecological risks, and damage assessment, authors investigate the use of technology for anticipating, and later evaluating, the amount of damage that is done to human society, watersheds, and forests by land-falling storms. The economic and ecological vulnerability of coastal regions are also studied and are supported by case studies which examine the potential hazards related to the evacuation of populated areas, including medical facilities. These studies provide decision makers with a potential basis for developing improved evacuation techniques.
Download or read book Formation of Gravitational Hurricanes Simulated by Numerical Gravitational Gas Dynamics Model written by A. Pavlov and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamical Structure of a Steady State Hurricane I written by Tiruvalam Natarajan Krishnamurti and published by . This book was released on 1966 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hurricanes written by Robert Hart and published by . This book was released on 2006 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Ensemble Numerical Modeling Study of Alantic Basin Hurricane Intensification written by Bonnie R. Brown and published by . This book was released on 2014 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid intensification of tropical cyclones is an active area of research in the atmospheric sciences due to the difficulty of forecasting cyclone intensity and the unclear mechanism by which a hurricane my undergo explosive deepening. Ensemble numerical modeling studies of six tropical cyclones from 2009, 2010 and 2011 which underwent periods of strong intensification are conducted here. The goal is to identify common storm structures in intensifying hurricanes while filling a gap in the current research between case studies of rapid intensification and climatological/statistical type studies of hurricane intensification rates by using a compositing method. A 96-member ensemble is run for a 24 hour forecast using the Weather Research and Forecasting (WRF) model for hurricanes Bill (2009), Earl (2010), Igor (2010), Julia (2010), Katia (2011), and Ophelia (2011). Ensemble sensitivity analysis is used to investigate which patterns in the analysis have a strong influence on the forecast intensity and then a novel sensitivity compositing is used to identify common patterns which affect the forecast intensity. It is found that these hurricanes are all predicted to respond to an increased primary and secondary circulation, an increased warm core, a raised tropopause and moistening of rain bands with an increased forecast intensity. Perturbed initial conditions show a linear model response for small perturbations but also signs of non-linearity at large perturbations, indicating that these sensitivity patterns are robust for limited additional strengthening of the hurricane. When perturbations are partitioned into dry and moist variables, it is seen that most of the model response is achieved by the dry dynamics. Further investigation is conducted into the rapid intensification of Earl (2010) and Igor (2010) but creating ensemble forecasts with additional, high-resolution nested domains which allow explicit convection. When the ensemble sensitivity analysis is repeated, the results of the initial analysis are confirmed. When the evolution of the perturbed experiments is compared to that of the unperturbed, strong perturbations in the tangential and radial wind as well as the column integrated water vapor are found to persist throughout the forecast, except in the case where only the moist variables were perturbed. An equivalent potential temperature budget highlights the important role of dynamical processes, i.e., advection, and finds that mean vertical advection and eddy processes have a particular positive influence on the hurricane intensity.
