The Rapid Intensification and Eyewall Replacement Cycles of Hurricane
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Observed Hurricane Wind Speed Asymmetries and Relationships to Motion and Environmental Shear
1290 MONTHLY WEATHER REVIEW VOLUME 142 Observed Hurricane Wind Speed Asymmetries and Relationships to Motion and Environmental Shear ERIC W. UHLHORN NOAA/AOML/Hurricane Research Division, Miami, Florida BRADLEY W. KLOTZ Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida TOMISLAVA VUKICEVIC,PAUL D. REASOR, AND ROBERT F. ROGERS NOAA/AOML/Hurricane Research Division, Miami, Florida (Manuscript received 6 June 2013, in final form 19 November 2013) ABSTRACT Wavenumber-1 wind speed asymmetries in 35 hurricanes are quantified in terms of their amplitude and phase, based on aircraft observations from 128 individual flights between 1998 and 2011. The impacts of motion and 850–200-mb environmental vertical shear are examined separately to estimate the resulting asymmetric structures at the sea surface and standard 700-mb reconnaissance flight level. The surface asymmetry amplitude is on average around 50% smaller than found at flight level, and while the asymmetry amplitude grows in proportion to storm translation speed at the flight level, no significant growth at the surface is observed, contrary to conventional assumption. However, a significant upwind storm-motion- relative phase rotation is found at the surface as translation speed increases, while the flight-level phase remains fairly constant. After removing the estimated impact of storm motion on the asymmetry, a significant residual shear direction-relative asymmetry is found, particularly at the surface, and, on average, is located downshear to the left of shear. Furthermore, the shear-relative phase has a significant downwind rotation as shear magnitude increases, such that the maximum rotates from the downshear to left-of-shear azimuthal location. -
Resilience Potential: Assessing Jamaica's “Bounce-Back” from Hurricane Dean
Resilience Potential: Assessing Jamaica’s “Bounce-Back” from Hurricane Dean CaPRI is a Caribbean think tank that promotes evidence- based policymaking in the region. CaPRI espouses a methodology which is built on the values of multi- disciplinary work, team work and the utilization of the diaspora in our search for evidence. Committed to the region’s development, CaPRI has strong linkages with the academic community, the private sector and civil society. For information and feedback, please contact: Caribbean Policy Research Institute GUANGO TREE HOUSE, 29 MUNROE ROAD, KINGSTON 6 JAMAICA, W.I. TEL: (876) 970-3447 (876) 970-2910 FAX: (876) 970-4544 E-mail: [email protected] WEBSITE: http://www.takingresponsibility.org 2 Table of Contents Pages List of Figures, Tables and Boxes .............................................................4 Preface......................................................................................................5 Executive Summary .................................................................................6-7 Introduction: Resilience Potential ...........................................................8-9 1. Natural Disasters: The Global Context................................................10-13 2. Natural Disasters in the Caribbean .....................................................14-18 3. Changing Practices in Disaster Management…………………………19-20 4. Disaster Management in Jamaica .....................................................21 4.1 National Disaster Plan…………………………………………….21 -
And Hurricane Michael (2018)
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. Access to this work was provided by the University of Maryland, Baltimore County (UMBC) ScholarWorks@UMBC digital repository on the Maryland Shared Open Access (MD-SOAR) platform. Please provide feedback Please support the ScholarWorks@UMBC repository by emailing [email protected] and telling us what having access to this work means to you and why it’s important to you. Thank you. atmosphere Article Understanding the Role of Mean and Eddy Momentum Transport in the Rapid Intensification of Hurricane Irma (2017) and Hurricane Michael (2018) Alrick Green 1, Sundararaman G. Gopalakrishnan 2, Ghassan J. Alaka, Jr. 2 and Sen Chiao 3,* 1 Atmospheric Physics, University of Maryland, Baltimore County, Baltimore, MD 21250, USA; [email protected] 2 Hurricane Research Division, NOAA/AOML, Miami, FL 33149, USA; [email protected] (S.G.G.); [email protected] (G.J.A.) 3 Department of Meteorology and Climate Science, San Jose State University, San Jose, CA 95192, USA * Correspondence: [email protected]; Tel.: +1-408-924-5204 Abstract: The prediction of rapid intensification (RI) in tropical cyclones (TCs) is a challenging problem. In this study, the RI process and factors contributing to it are compared for two TCs: an axis-symmetric case (Hurricane Irma, 2017) and an asymmetric case (Hurricane Michael, 2018). -
Fishing Pier Design Guidance Part 1
Fishing Pier Design Guidance Part 1: Historical Pier Damage in Florida Ralph R. Clark Florida Department of Environmental Protection Bureau of Beaches and Coastal Systems May 2010 Table of Contents Foreword............................................................................................................................. i Table of Contents ............................................................................................................... ii Chapter 1 – Introduction................................................................................................... 1 Chapter 2 – Ocean and Gulf Pier Damages in Florida................................................... 4 Chapter 3 – Three Major Hurricanes of the Late 1970’s............................................... 6 September 23, 1975 – Hurricane Eloise ...................................................................... 6 September 3, 1979 – Hurricane David ........................................................................ 6 September 13, 1979 – Hurricane Frederic.................................................................. 7 Chapter 4 – Two Hurricanes and Four Storms of the 1980’s........................................ 8 June 18, 1982 – No Name Storm.................................................................................. 8 November 21-24, 1984 – Thanksgiving Storm............................................................ 8 August 30-September 1, 1985 – Hurricane Elena ...................................................... 9 October 31, -
© Mitigation of Cyclonic Activity Lawrence Sirovich, Rockefeller University Abstract Under Realistic Estimates of Geophysical
Management of Cyclonic Activity Lawrence Sirovich, Rockefeller University Abstract Based on realistic estimates of geophysical conditions, we demonstrate that the intensity of a hurricane may be diminished before reaching landfall, and under other circumstances, might be quenched in an incipient stage. It will be shown that with present-day technology, it is possible to mix the cold deep ocean with the warm surface layer sufficiently, and in a timely manner, in order to decrease cyclonic intensity. Two strategies will be presented: (1) In a manner similar to hurricane weakening by landfall, a virtual early landfall is created on the hurricane path, before true landfall; (2) An identified tropical depression might be quenched, by cyclonic or anti- cyclonic means, and timely intervention. Estimates of the power needed to perform the needed ocean mixing, in a timely manner, show that this might be accomplished by employing a sufficient number of high-performance submarines. The achievement of this goal is made possible by an unusually high coefficient of performance, O(10^4). The destructive power of the hurricane is a function of a hurricane’s maximal wind speed, Vm. It will be shown that even a 20% reduction in this wind speed produces a ~50% reduction in destructive costs. On the flip side of these considerations, there is the possibility of using such means, under favorable circumstances, to initiate rainfall for relief of drought areas. Novel vessel modifications are introduced to achieve the mixing process It is the contention of this paper that a practical framework now exists for sensibly exploring means by which to reduce the tragedy and devastation caused by hurricanes. -
Geographical and Historical Variation in Hurricanes Across the Yucatán Peninsula
Chapter 27 Geographical and Historical Variation in Hurricanes Across the Yucatán Peninsula Emery R. Boose David R. Foster Audrey Barker Plotkin Brian Hall INTRODUCTION Disturbance is a continual though varying theme in the history of the Yucatán Peninsula. Ancient Maya civilizations cleared and modified much of the forested landscape for millennia, and then abruptly abandoned large areas nearly 1,000 years ago, allowing forests of native species to reestablish and mature (Turner 1974; Hodell, Curtis, and Brenner 1995). More recently, late twentieth century population growth has fueled a resurgence of land-use activity including logging, slash-and-burn agriculture, large mechanized agricultural projects, tourism, and urban expansion (Turner et al. 2001; Turner, Geoghegan, and Foster 2002). Throughout this lengthy history, fires have affected the region—ignited purposefully or accidentally by humans, and occasionally by lightning (Lundell 1940; Snook 1998). And, as indicated by ancient Maya records, historical accounts, and contemporary observations, intense winds associated with hurricanes have repeatedly damaged forests and human settlements (Wilson 1980; Morales 1993). Despite the generally acknowledged importance of natural and human disturbance in the Yucatán Peninsula, there has been little attempt to quantify This research was supported by grants from the National Aeronautics and Space Agency (Land Cover Land-Use Change Program), the National Science Foundation (DEB-9318552, DEB-9411975), and the A. W. Mellon Foundation, and is a contribution from the Harvard Forest Long-Term Ecological Research Program. 495 496 THE LOWLAND MAYA AREA the spatial and temporal distribution of this activity, or to interpret its relationship to modern vegetation patterns (cf. Lundell 1937, 1938; Cairns et al. -
Hurricane & Tropical Storm
5.8 HURRICANE & TROPICAL STORM SECTION 5.8 HURRICANE AND TROPICAL STORM 5.8.1 HAZARD DESCRIPTION A tropical cyclone is a rotating, organized system of clouds and thunderstorms that originates over tropical or sub-tropical waters and has a closed low-level circulation. Tropical depressions, tropical storms, and hurricanes are all considered tropical cyclones. These storms rotate counterclockwise in the northern hemisphere around the center and are accompanied by heavy rain and strong winds (NOAA, 2013). Almost all tropical storms and hurricanes in the Atlantic basin (which includes the Gulf of Mexico and Caribbean Sea) form between June 1 and November 30 (hurricane season). August and September are peak months for hurricane development. The average wind speeds for tropical storms and hurricanes are listed below: . A tropical depression has a maximum sustained wind speeds of 38 miles per hour (mph) or less . A tropical storm has maximum sustained wind speeds of 39 to 73 mph . A hurricane has maximum sustained wind speeds of 74 mph or higher. In the western North Pacific, hurricanes are called typhoons; similar storms in the Indian Ocean and South Pacific Ocean are called cyclones. A major hurricane has maximum sustained wind speeds of 111 mph or higher (NOAA, 2013). Over a two-year period, the United States coastline is struck by an average of three hurricanes, one of which is classified as a major hurricane. Hurricanes, tropical storms, and tropical depressions may pose a threat to life and property. These storms bring heavy rain, storm surge and flooding (NOAA, 2013). The cooler waters off the coast of New Jersey can serve to diminish the energy of storms that have traveled up the eastern seaboard. -
Revista 224.Indd
U CARIBBEAn TROPICAL STORMS Ecological Implications for Pre-Hispanic and Contemporary Maya Subsistence on the Yucatan Peninsula Herman W. Konrad ABSTRACT The ecological stress factor of hurricanes is examined as a dimension of pre-Hispanic Maya adaptation to a tropical forest habitat in the Yucatan peninsula. Pre-Hispanic, colonial and contemporary texts as well as climatic data from the Caribbean region support the thesis that the hurricane was an integral feature of the pre-Hispanic Maya cosmology and ecological paradigm. The author argues that destruction of forests by tropical storms and subsequent succession cycles mimic not only swidden —"slash- and-burn"— agriculture, but also slower, natural succession cycles. With varying degrees of success, flora and fauna adapt to periodic, radical ecosystem disruption in the most frequently hard-hit areas. While not ignoring more widely-discussed issues surrounding the longevity and decline of pre-Hispanic Maya civilization, such as political development, settlement patterns, migration, demographic stability, warfare and trade, the author suggests that effective adaptation to the ecological effects of tropical storms helped determine the success of pre-Hispanic Herman W. Konrad. university Maya subsistence strategies. of Calgary. Email: [email protected] gary.ca NÚMERO 224 • PRIMER TRIMESTRE DE 2003 • 99 Herman W. Konrad RESuMEn Los efectos ecológicos causados por los huracanes se analizan en el contexto de la adaptación de los mayas prehispánicos a la selva de la península de Yucatán. Textos prehispánicos, coloniales y contemporáneos, así como información climática sobre el Caribe en general, apoyan la hipótesis de que el huracán era un elemento central en la cosmovisión y el paradigma ecológico prehispánico. -
ANNUAL SUMMARY Atlantic Hurricane Season of 2005
MARCH 2008 ANNUAL SUMMARY 1109 ANNUAL SUMMARY Atlantic Hurricane Season of 2005 JOHN L. BEVEN II, LIXION A. AVILA,ERIC S. BLAKE,DANIEL P. BROWN,JAMES L. FRANKLIN, RICHARD D. KNABB,RICHARD J. PASCH,JAMIE R. RHOME, AND STACY R. STEWART Tropical Prediction Center, NOAA/NWS/National Hurricane Center, Miami, Florida (Manuscript received 2 November 2006, in final form 30 April 2007) ABSTRACT The 2005 Atlantic hurricane season was the most active of record. Twenty-eight storms occurred, includ- ing 27 tropical storms and one subtropical storm. Fifteen of the storms became hurricanes, and seven of these became major hurricanes. Additionally, there were two tropical depressions and one subtropical depression. Numerous records for single-season activity were set, including most storms, most hurricanes, and highest accumulated cyclone energy index. Five hurricanes and two tropical storms made landfall in the United States, including four major hurricanes. Eight other cyclones made landfall elsewhere in the basin, and five systems that did not make landfall nonetheless impacted land areas. The 2005 storms directly caused nearly 1700 deaths. This includes approximately 1500 in the United States from Hurricane Katrina— the deadliest U.S. hurricane since 1928. The storms also caused well over $100 billion in damages in the United States alone, making 2005 the costliest hurricane season of record. 1. Introduction intervals for all tropical and subtropical cyclones with intensities of 34 kt or greater; Bell et al. 2000), the 2005 By almost all standards of measure, the 2005 Atlantic season had a record value of about 256% of the long- hurricane season was the most active of record. -
CCRIFSPC Journey Through T
CCRIF receives the ‘Reinsurance Initiative of the Year’ Award for the reinsurance initiative that generated the most promising CARICOM Heads of Government approach change to a signifi cant area of the World Bank for assistance to design business – the award was offered and implement a cost-effective risk transfer by The Review, the leading programme for member governments magazine of the international reinsurance industry Hurricane Ivan causes CCRIF makes payout to Turks and billions of dollars of losses Caicos Islands for Hurricane Ike across the Caribbean CCRIF makes the Real-Time Forecasting System (RTFS) available CCRIF is named to members for the fi rst ‘Transaction of time – each year it is the Year’ at the available to members Insurance Day at the beginning of London Market the Atlantic Hurricane Awards Season 2007 2004 2008 The Caribbean Catastrophe Risk Insurance Facility is formed as the fi rst multi-country, multi-peril pooled catastrophe risk insurance facility in the world A Multi-donor Trust Fund (MDTF) is established to support CCRIF’s initial operations CCRIF signs fi rst MOU with the Caribbean Institute CCRIF provides tropical cyclone (hurricane) and earthquake for Meteorology and Hydrology (CIMH) – over the coverage to 16 Caribbean member governments years, CCRIF has signed MOUs with the Caribbean Community Climate Change Centre (CCCCC), United Nations Economic Commission for Latin America and the Caribbean (ECLAC), Caribbean Disaster Emergency Management Agency (CDEMA), Inter- American Development Bank (IDB), University -
Hurricane Eyewall Slope As Determined from Airborne Radar Reflectivity Data: Composites and Case Studies
368 WEATHER AND FORECASTING VOLUME 28 Hurricane Eyewall Slope as Determined from Airborne Radar Reflectivity Data: Composites and Case Studies ANDREW T. HAZELTON AND ROBERT E. HART Department of Earth, Ocean, and Atmospheric Science, The Florida State University, Tallahassee, Florida (Manuscript received 19 April 2012, in final form 6 December 2012) ABSTRACT Understanding and predicting the evolution of the tropical cyclone (TC) inner core continues to be a major research focus in tropical meteorology. Eyewall slope and its relationship to intensity and intensity change is one example that has been insufficiently studied. Accordingly, in this study, radar reflectivity data are used to quantify and analyze the azimuthal average and variance of eyewall slopes from 124 flight legs among 15 Atlantic TCs from 2004 to 2011. The slopes from each flight leg are averaged into 6-h increments around the best-track times to allow for a comparison of slope and best-track intensity. A statistically significant re- lationship is found between both the azimuthal mean slope and pressure and between slope and wind. In addition, several individual TCs show higher correlation between slope and intensity, and TCs with both relatively high and low correlations are examined in case studies. In addition, a correlation is found between slope and radar-based eye size at 2 km, but size shows little correlation with intensity. There is also a tendency for the eyewall to tilt downshear by an average of approximately 108. In addition, the upper eyewall slopes more sharply than the lower eyewall in about three-quarters of the cases. Analysis of case studies discusses the potential effects on eyewall slope of both inner-core and environmental processes, such as vertical shear, ocean heat content, and eyewall replacement cycles. -
Florida Hurricanes and Tropical Storms
FLORIDA HURRICANES AND TROPICAL STORMS 1871-1995: An Historical Survey Fred Doehring, Iver W. Duedall, and John M. Williams '+wcCopy~~ I~BN 0-912747-08-0 Florida SeaGrant College is supported by award of the Office of Sea Grant, NationalOceanic and Atmospheric Administration, U.S. Department of Commerce,grant number NA 36RG-0070, under provisions of the NationalSea Grant College and Programs Act of 1966. This information is published by the Sea Grant Extension Program which functionsas a coinponentof the Florida Cooperative Extension Service, John T. Woeste, Dean, in conducting Cooperative Extensionwork in Agriculture, Home Economics, and Marine Sciences,State of Florida, U.S. Departmentof Agriculture, U.S. Departmentof Commerce, and Boards of County Commissioners, cooperating.Printed and distributed in furtherance af the Actsof Congressof May 8 andJune 14, 1914.The Florida Sea Grant Collegeis an Equal Opportunity-AffirmativeAction employer authorizedto provide research, educational information and other servicesonly to individuals and institutions that function without regardto race,color, sex, age,handicap or nationalorigin. Coverphoto: Hank Brandli & Rob Downey LOANCOPY ONLY Florida Hurricanes and Tropical Storms 1871-1995: An Historical survey Fred Doehring, Iver W. Duedall, and John M. Williams Division of Marine and Environmental Systems, Florida Institute of Technology Melbourne, FL 32901 Technical Paper - 71 June 1994 $5.00 Copies may be obtained from: Florida Sea Grant College Program University of Florida Building 803 P.O. Box 110409 Gainesville, FL 32611-0409 904-392-2801 II Our friend andcolleague, Fred Doehringpictured below, died on January 5, 1993, before this manuscript was completed. Until his death, Fred had spent the last 18 months painstakingly researchingdata for this book.