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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
Satellite data is compared to objectively analyzed wind data from the Hurricane Research Division's H*Wind software to attempt to quantify the value that satellite data could bring to the objective analysis. Previous research (DiNapoli...
The tropical cyclone superensemble has provided skillful forecasts for Atlantic tropical cyclone activity for several years. Until very recently, the tropical cyclone superensemble had only been run using a suite of large scale models....
This research involves the creation of a new storm surge index that incorporates many variables important in storm surge generation like maximum winds, radius of maximum winds, pressure, translation speed, and bathymetry. Using a two...
Ocean transport of heat is a substantial component of the climate system but its characteristics and dynamic causes are still somewhat unknown. Prior research has shown that global observations from the ocean and atmosphere indicate that...
Anthropogenic pollution impacts many of the Earth's natural processes. Therefore, understanding the mechanisms that transport pollutants from the surface to the free atmosphere is important for understanding the chemical composition of...
Accurate knowledge of cloud-top height is important for a range of meteorological applications. Uses include cloud classification and the assignment of height levels to cloud drift winds. Such data may also be useful for monitoring...
Tornado reports are combined with hurricane data to generate a dataset of tornadoes associated with tropical cyclones affecting the coastal Gulf of Mexico and Florida's East Coast between 2000 – 2008. A pool of 28 potential predictors of...
Centrifugal instability (CI) has been suggested by recent numerical studies to be a boundary mechanism promoting mixing. As opposed to Kelvin-Helmholtz instability, however, little is known about its detailed energetics. The goal of this...
Radiance data obtained from NASA's Advanced Infrared Sounder (AIRS) is used in an attempt to improve the mesoscale prediction of temperature and moisture using one- and four-dimensional variational data assimilation (1D/4D-Var). The...
Curvature vorticity and shear vorticity are examined in an attempt to elucidate the physical mechanisms behind tropical cyclone (TC) intensity change. A particular emphasis is placed on the role of the shear to curvature vorticity...
The role of the Tropical Easterly Jet (TEJ) in West African rainfall climatology has received little attention in the research community to date. Therefore, this dissertation will examine the instabilities and wave activity associated...
Anthropogenic emissions are transported both locally and globally. Depending on the magnitude of the transport, the emissions can have varying impacts on air quality and atmospheric chemistry. Transport occurs most efficiently if...
In this study, a scale interactions and energetics formulation is utilized to examine the kinetic (KE) and available potential energy (APE) maintenance of the Madden Julian Oscillation (MJO). An analysis that computes the energy exchange...
Tropical cyclones can form from many different precursors, including baroclinic systems. The process of an extratropical system evolving into a warm core tropical cyclone is defined by Davis and Bosart (2004) as a Tropical Transition (TT...
The need for a surface based, dense meteorological observation network in Florida has long been recognized. In 2002, scientists across the state of Florida joined together with the National Science Foundation, the REALM Project, the...
The goal of this research is to describe and quantify the role of deep convection within the Strait of Malacca (hereafter referred to as the "Strait" a part of the Maritime Continent in Southeast Asia) on the long-range transport of ship...
The Kennedy Space Center in east Central Florida is one of the few locations in the country that issues lightning advisories. These forecasts are vital to the daily operations of the Space Center and take on even greater significance...
Statistics of extreme events in weather and climate (e.g. rare floods or strong wind storms) are commonly based on the assumption of Gaussian statistics. Sixty-two years of National Centers for Environmental Prediction / National Center...
The sporadic nature of lightning in tropical cyclones (TCs) is a topic of great interest to researchers and forecasters. This study explores relationships between lightning, cloud microphysics, and TC storm structure in rapidly...
Tropical cyclogenesis in the eastern North Pacific (EPAC) basin is related to gap-wind-induced vorticity, the monsoon trough, and the intertropical convergence zone (ITCZ). There are several gaps in the Central American Mountains, on the...
A positive correlation between sea surface temperature (SST) and wind stress perturbation near strong SST gradients (ΔSST) has been observed in different parts of the world ocean, such as the Gulf Stream in the North Atlantic and the...
Storm-Relative Eulerian Absolute Angular Momentum Tendency in Atlantic Tropical Cyclones: Advection and Torques and Their Relative Roles in Vortex Strengthening
This study examined inner-core sources and sinks of angular momentum in Atlantic tropical cyclones. Each advective and torque term in the Eulerian absolute angular momentum tendency equation was calculated in a storm-relative reference...
In order to understand the physical mechanisms of the Australian summer monsoon, cyclostationary EOF analysis was conducted on the 23-year (1979-2002) Xie- Arkin pentad summer precipitation data and other key physical variables over the...
Improving lightning cessation forecasts is important to operations of the 45th Weather Squadron (45WS) at Kennedy Space Center (KSC). If lightning advisories can be cancelled closer to the time that cessation actually occurs without...
The Asian summer monsoon is a dominant feature of the global circulation. The upper-level anticyclone (ULAC) associated with the Asian summer monsoon circulation stands out vividly in satellite observations of trace gases. The ULAC also...
The National Aeronautics and Space Administration (NASA) conducted the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) mission during 2008 as a part of the International Polar Year (IPY). The...
This study presents a new method for assimilating lightning data into numerical models that is suitable for cloud-resolving scales (e.g., 3 km). The study utilized data from the Earth Networks Total Lightning Network at 9 km grid spacing...
Using a suite of high resolution models, the forecast skills of the superensemble for precipitation and 2-meter temperature over the continental United States and North America are shown. In this study, models and/or gridded fields such...
The goal of this study is to further investigate the relationship between the microphysical processes of a tropical cyclone and its intensification. Hydrometeors such as rainwater, cloud ice, cloud water, snow, and graupel play a...
Coherent Tropopause Disturbances (CTD's) have been observed to play a central role in both extratropical cyclogenesis and the dynamics of jet streaks. Recent observational studies have quantified the existence of CTD's by locating...
One of the goals of NASA's Intercontinental Chemical Transport Experiment Phase B (INTEX-B) was to perform quasi-Lagrangian (q-L) sampling of air pollution as it is transported across the Pacific Ocean from Asia toward North America. We...
Offshore resource assessment relies on estimating wind speeds at turbine hub height using observations typically made at substantially lower height. The methods used to adjust from observed wind speeds to hub height can impact resource...
Recent, recurrent, and extreme weather events have been a cause for concern over the Eastern Caribbean (EC). Given the dependence on rainfall of agriculture, the main stay of the fragile economies throughout the region, accurate and...
A composite study is presented analyzing the influence of upper-tropospheric troughs on the evolution of precipitation in twelve Atlantic tropical cyclones (TCs) between the years 2000 – 2005. The TRMM Multi-Satellite Precipitation...
Two emerging datasets, QuikSCAT surface winds and Global Positioning System (GPS) radio occultation (RO) vertical soundings, have the potential to improve tropical cyclone (TC) initialization and, in turn, improve TC prediction. QuikSCAT...
Many tropical cyclones move poleward, encounter vertical shear associated with the midlatitude circulation, and undergo a process called extratropical transition (ET). One of the many factors affecting the post-transition extratropical...
This study examines the impact of anomalous differential generation of available potential energy by absorbing aerosols on the transition and early active phases of the south Asian summer monsoon. Aerosol direct and indirect effects...
We will describe the development of a high-resolution, gridded forecast guidance product for warm season cloud-to-ground (CG) lightning in Florida. Four warm seasons of analysis data from the 20-km Rapid Update Cycle (RUC) and lightning...
The impact of tropical cyclones on Canadian Provinces is an important issue. From 1994 to 2003, fifty-five tropical cyclones entered the Canadian Hurricane Centre (CHC) Response Zone, or ~42% of all named Atlantic tropical cyclones in...
The Gulf of Mexico is among the most populated of coastlines threatened by tropical cyclones and has experienced some of the most destructive hurricanes in history. The importance of the warm ocean waters of the Gulf in providing optimal...
Studies of tropical cyclone (TC) structure, dynamics, and thermodynamics have long benefitted from databases of in-situ aircraft and dropwindsonde observations. With the first deployment of Doppler radar equipped aircraft into TCs in...
This study will examine scale interactions and energy transformations that occur during hurricane genesis. A high-resolution mesoscale model that uses initial and boundary conditions obtained from the National Centers for Environmental...
The Weather Research and Forecasting Model (WRF) was developed by the National Center for Atmospheric Research as the next generation mesoscale meteorology model. The inclusion of a chemistry module (WRF-Chem) allows transport...
This study has evaluated an existing hybrid three-dimensional variational ensemble transform Kalman filter (3DVAR-ETKF) ensemble data assimilation system using the Weather Research and Forecasting (WRF) model in realistic numerical...
Extensive analysis has been conducted over past decades showing the impacts of El Niño-Southern Oscillation (ENSO) on various regions throughout the world. However, these studies have not analyzed data from many stations in Panama, or...
The availability of high resolution temperature and water vapor data is critical for the study of mesoscale scale weather phenomena (e.g., convective initiations, and tropical cyclones). As hyperspectral infrared sounders, the...
Statistical Prediction of Tropical Cyclone Intensity Using Dynamical and Thermodynamical Inner-Core Parameters Derived from Hwrf Analysis and Forecasts
A new multiple linear regression model for short range tropical cyclone intensity prediction is developed. Four new dynamical and thermodynamical predictors based on HWRF output are considered: (1) the horizontal advection of relative...
Although tropical cyclone (TC) track forecasts have improved considerably in recent years, predicting their intensity continues to be a challenge for both meteorologists and numerical models. A storm's path is primarily influenced...
A two-phase study of the potential impact of Geosynchronous Imaging Fourier Transfer Spectrometer (GIFTS) radiance data to the prediction of strong convective events was developed. In the first phase of the project, a statistical...
This study examines the changes in boundary layer of landfalling tropical cyclones. Several storms which made landfall near surface observation platforms capable of high resolution data storage were examined. These records were subjected...
Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
