Tropical Cyclone Structure and Intensity Change


Book Description

The long-term goals of our research are to understand the interactions between tropical cyclones and their surroundings, and how such interactions influence tropical cyclone structure and intensity. The primary objective of this proposal was to understand the interactions of upper tropospheric potential vorticity centers and tropical cyclones, and to develop a "path to operations" that will allow prediction of tropical cyclone intensity change during such interactions. This objective is an extension of our previous ONR-funded work. The second objective was to understand the mechanisms behind the clustering of tropical cyclone occurrence in time, with the ultimate goal of predicting the presence of multiple tropical cyclones in advance. This represents a new initiative. Early studies have been for the eastern Pacific Ocean, but are now being extended to the western Pacific.




Tropical Cyclones


Book Description

Tropical Cyclones and hurricanes, long feared for the death and destruction that often accompanies them, are among the most fascinating of atmospheric phenomena. Created by thermodynamic processes, they unleash vast amounts of energy and influence a wide variety of natural processes along their paths. Richard Anthes tells the story of tropical cyclones creation and destruction, of meteorology's successes in understanding, modeling and predicting their behavior, and of the attempts to modify them. The book begins with a lively introduction to hurricanes, their awesome power, and their effects on individuals and societies in the past and present. The characteristics of the mature hurricane are revealed by consideration of rawinsonde, aircraft and satellite data. The physical processes responsible for the development and maintenance of tropical cyclones are treated comprehensively, and illustrated with both qualitative and quantitative examples. The role of the planetary boundary layer, cumulus convection and radiation are all discussed in detail. Progress in numerical simulation of tropical cyclones is carefully reviewed. Modern, three-dimensional models succeed in simulating observed features such as the eye and spiral rain bands and in predicting storm motion over time intervals of three days. Current capabilities to predict and modify hurricanes and tropical cyclones are fully examined. The methods and difficulties of operational forecasting, the economic aspects of storm predictions, and the trends in accuracy of offical forecasts are all considered. The potential benefits and scientific problems associated with hurricane modification are discussed as part of a review of experimental and theoretical results on the consquences of seeding hurricane clouds. A unique feature of the book is a thorough treatment of the interactions between storm and ocean, with both observations and thery being integrated to provide a complete description.




The Representation of Cumulus Convection in Numerical Models


Book Description

This book presents descriptions of numerical models for testing cumulus in cloud fields. It is divided into six parts. Part I provides an overview of the problem, including descriptions of cumulus clouds and the effects of ensembles of cumulus clouds on mass, momentum, and vorticity distributions. A review of closure assumptions is also provided. A review of "classical" convection schemes in widespread use is provided in Part II. The special problems associated with the representation of convection in mesoscale models are discussed in Part III, along with descriptions of some of the commonly used mesoscale schemes. Part IV covers some of the problems associated with the representation of convection in climate models, while the parameterization of slantwise convection is the subject of Part V.




A World of Weather


Book Description













Extratropical Cyclones


Book Description

This book is composed of 12 review papers invited for the Palmen Memorial Symposium on Extratropical Cyclones held in Helsinki, Finland, 29 August - 2 September 1988. To celebrate the 90th anniversary of the birth of Professor Erik Palmén, this symposium was organized to give a state-of-the-art picture of research on the structure and dynamics of extratropical cyclones, a topic which Palmén pioneered during the era of advances in aerological analysis. This symposium was organized by the Geophysical Society of Finland and the American Meteorological Society in cooperation with the Danish, Norwegian and Swedish Geophysical Societies. Extratropical Cyclones offers state-of-the-art information on extratropical cyclones, and recent findings by European and American authorities in various subject areas. The first two chapters discuss Palmen's works on cyclones and his early general circulation concepts. The ten chapters following chronicle the advances in understanding cyclones; the theory, structure, and physical processes of cyclones; orographic cyclogenesis; and more. Extratropical Cyclones also contains synoptic case analyses, modeling results, examples of the phenomena discussed, and abundant references. While particular aspects are emphasized in the individual contributions, the book as a whole summarizes the major features of various kinds of extratropical cyclones based on observational analyses, theory and numerical experimentation. This volume is of interest to researchers in dynamic and synoptic meteorology, climatology and mesometeorology, as well as in numerical modeling and weather forecasting. It is also useful for meteorology courses at graduate and upper undergraduate levels.




Global Perspectives On Tropical Cyclones: From Science To Mitigation


Book Description

This book is a completely rewritten, updated and expanded new edition of the original Global Perspectives on Tropical Cyclones published in 1995. It presents a comprehensive review of the state of science and forecasting of tropical cyclones together with the application of this science to disaster mitigation, hence the tag: From Science to Mitigation.Since the previous volume, enormous progress in understanding tropical cyclones has been achieved. These advances range from the theoretical through to ever more sophisticated computer modeling, all underpinned by a vast and growing range of observations from airborne, space and ocean observation platforms. The growth in observational capability is reflected by the inclusion of three new chapters on this topic. The chapter on the effects of climate change on tropical cyclone activity is also new, and appropriate given the recent intense debate on this issue. The advances in the understanding of tropical cyclones which have led to significant improvements in forecasting track, intensity, rainfall and storm surge, are reviewed in detail over three chapters. For the first time, a chapter on seasonal prediction is included. The book concludes with an important chapter on disaster mitigation, which is timely given the enormous loss of life in recent tropical cyclone disasters.World Scientific Series on Asia-Pacific Weather and Climate is indexed in SCOPUS.