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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...
Seamounts are one of the largest biomes on earth, yet remain one of the least explored. They are known to be centers of increased biomass, species richness, endemism and speciation as well as areas of distinct community structure, as...
The Great Smokey Group and the Mineral Bluff Group of the southern Appalachians Blue Ridge contain units of metaconglomerate that contain stretched quartz pebbles. Quartz pebbles have been widely used as strain markers in conglomerates....
The land/sea warming contrast being greater than unity is a well-known phenomenon in response to anthropogenic radiative forcing. The land/sea surface warming asymmetry is essentially a result of the differing surface and boundary layer...
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...
A large fraction of the continental shelf is covered by permeable sediments that are flushed by wave, wind, and tide generated bottom currents. Elevated dissolved organic carbon (DOC) concentrations in coastal zones, a diverse and...
The Florida Big Bend region in the northeastern Gulf of Mexico contains both spawning sites and nursery habitats for a variety of economically valuable marine species. One species, the gag grouper (Mycteroperca microlepis), relies on the...
The deep-sea, soft-bottom habitat is considered the largest ecosystem on Earth, yet little is known about the biogeography of the infauna. This dissertation examines the species' ranges of the meiofaunal taxon Harpacticoida (Crustacea:...
A combination of observational and numerical analyses is used to investigate hurricane boundary layer (BL) structure in the context of intensity change. These analyses refer to hurricanes in three modes of intensity change: intensifying ...
Ice clouds play an important role in earth radiation balance by reflecting solar and absorbing thermal radiation, the so-called albedo versus greenhouse eects, which cause signicant dierential atmospheric heating and cooling in...
The advent of ensembles permits forecasters to have an implied level of confidence based upon the level of (dis)agreement among those ensembles. However, there are occasionally situations where the ensemble members may agree but be in...
Metallic nodules are common in metamorphosed ordinary chondrites. The origin of metal nodules has been debated because the mechanism of the formation of metal nodules is not known. Several proposed scenarios, e.g., the metal nodules and...
A new metric for identifying severe tornado (F3+) alleys is presented. Regions are distinguished by average F-scale values with a minimum of 15 severe tornado events within 200km. Five distinct "severe tornado alleys" are described...
Investigations of the Ecology of Calcareous Nannoplankton and Nannofossils in the North-East Gulf of Mexico to Help Establish a Baseline for Environmental Impact Studies
This study presents for the first time, ecological relationships between coccolithophores and environmental conditions in the northeastern Gulf of Mexico. Cell densities of coccolithophores were determined in 598 samples taken from...
Radon is an important natural tracer for certain aquatic environmental studies. New methods for rapidly determining submarine groundwater discharge (SGD) into surface waters in the coastal zone rely on the accuracy of the air/water...
During IODP Leg 317 off the east coast of New Zealand, three continental shelf sites (U1351, U1353 and U1354) and one continental slope site were cored. Sedimentary sequences representing shallow water depositional cycles were recovered...
The recent reports of methane in the atmosphere of Mars, as well as the findings of hypersaline paleoenvironments on that planet, have underscored the need to evaluate the importance of biological (as opposed to geological) trace gas...
Satellite observations have revealed a small-scale (< 1000 km) air-sea coupling in regions of strong sea surface temperature (SST) gradients (e.g., fronts, currents, eddies, and tropical instability waves), where the surface wind and...
The primary goal of this dissertation was to explore the use of stable isotope analysis as a tool to understand how energy flows at several layers of biological organization from the individual to the ecosystem level. With the exception...
Emission of mercury from the burning of coal is considered one of the important anthropogenic sources of atmospheric mercury. Along with current measurements of the isotopic composition of atmospheric mercury being conducted in our...
High-Resolution Calcareous Nannofossil Biostratigraphic Applications: Examples from the Upper Cretaceous Southern Ocean (ODP Leg 183) and Paleocene Equatorial Atlantic (ODP Leg 207)
This dissertation is a collection of high-resolution calcareous nannofossil biostratigraphic projects. The projects are from Ocean Drilling Program (ODP) Leg 183 to the Kerguelen Plateau (Hole 1138A) and ODP Leg 207 to the Demerara Rise, ...
This dissertation research has used stable and radioactive isotope techniques to address several important issues in paleoclimate and paleoecoloical research which includes the reliability of using stable carbon isotope composition of...
In this study, we have diagnosed diabatic heating, meridional adiabatic mass and angular momentum transport, and downward transfer of westerly angular momentum by the pressure torque in isentropic coordinates using daily NCEP-NCAR...
The DOC reactivity of a northern peatland was investigated by measuring and modeling concentrations, stable isotopes, and natural abundance radiocarbon of solid phase peat, DOC, DIC, and CH4 in field and lab studies. We tested the...
Nitrogen (N) is often a limiting nutrient for primary productivity in the ocean and plays a critical role in the global carbon cycle. Fixation of N2 into reactive N (Nr) by photosynthetic prokaryotes in surface waters is a primary source...
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...
We derived the unidirectional shear flows appropriate for Hele Shaw cell when there is no buoyancy driving force. Using the Galerkin spectral method, the linear stability of Hele Shaw convection in shear flows has been analyzed. The... Using a modified perturbation method with a two parameter expansion and a strained time coordinate, we successfully obtained the oscillatory (steady) finite amplitude solutions with (without) imposed shear flows. The two parameters are $... The generated mean flow and the momentum flux in both shear flows were derived analytically and were increased whereas the Prandtl number decreases. The momentum flux in all shear flows is found to be always up the gradient of the mean... The study reported here might be very helpful for understanding the porous medium convection in shear flows. Therefore, the consequence of these results to ground water transport as well as industrial processes might be significant.
The Tongue of the Ocean (TOTO) region located within the Bahamas archipelago is a relatively under-studied region in terms of both its biological and physical oceanographic characteristics. This region is comprised of a deep trough along...
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...
The influence of a geostrophically balanced or potential vorticity (PV) background flow on gravity wave propagation is examined using a rotating shallow water model. The system is analyzed in the context of a perturbative expansion that...
The U.S. Air Force's 45th Weather Squadron (45WS) seeks improved forecasts of lightning cessation at the Kennedy Space Center (KSC) and Cape Canaveral Air Force Station (CCAFS) in Florida. The 45WS currently keeps lightning advisories...
During an El Niรฑo anomalous westerly winds in the central equatorial Pacific push the equatorial water eastward, raising the sea level in the eastern equatorial Pacific and lowering it in the western equatorial Pacific. In the western...
Use of empirical orthogonal functions (EOFs) as basis functions in numerical prediction models
Description:
An EOF methodology is applied to a hemispheric two-layer, baroclinic, primitive equation model to better understand the advantages and drawbacks of EOF modeling in numerical prediction. A spectral transform version of the model ... A statistical analysis is based on the spectral domain EOF expansion of the streamfunction, velocity potential and thickness of each layer. A comparison with spatially and temporally uncorrelated noise suggests that the first 65 PCs (6.4... The predictability of the EOF model is examined when the number of EOF modes is truncated at 50, 100 and 150. A set of 1800 experiments of EOF model forecasts were run with different initial conditions for each EOF truncation. The root...
A geochemical and strontium isotopic investigation of Laramide and younger igneous rocks in central Colorado, with emphasis on the petrogenesis of the Thirtynine Mile volcanic field. (Volumes I and II)
Description:
New and existing geochemical and Sr-isotopic data are used to characterize the composition and time-space distribution of Laramide and younger calc-alkaline to alkaline igneous rocks in central Colorado. The study is focussed on the $... Geochemical and Sr-isotopic evidence confirms tuff occurrences in the southern Denver basin are Wall Mountain Tuff ($\sim$36.7 Ma). Previous suggestions that the Wall Mountain Tuff is closely related to the Mount Princeton batholith are...
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 process by which tropical cyclones evolve from loosely organized convective clusters into well organized systems is still poorly understood. Due to the data sparse regions in which tropical cyclones form, observational studies of...
THE EFFECT OF THE BENTHIC BOUNDARY LAYER ON THE PHYSICS OF INTENSE MESOSCALE EDDIES
Description:
The Benthic Boundary Layer is a region close the ocean bottom with features distinct from the oceanic interior. Near the bottom the ocean is turbulent and the resultant mixing leads to a neutrally stratified bottom layer. Turbulent... The object of the present research is to analyze how the benthic region affects the dynamics of the forcing flow. More specifically, a numerical model based on the level 2 1/2 closure scheme of Mellor and Yamada is developed to examine... It is found that the decay of the flow occurs through conversion of kinetic to potential energy and through dissipation by bottom friction. The relative importance of both processes is expressed by the Rossby number (epsilon) = U/fR and... Examination of the structure of the Benthic Boundary Layer indicates that a clear distinction should be made between the mixed layer, or the region neutrally stratified, and the Bottom Boundary Layer, or the region where most of the...
The growth of a locally isolated strain of green algae, Chlorella sp., selected for its promise as a biodiesel feedstock, was studied in wastewater effluent from the municipal wastewater treatment plant in Tallahassee FL. Nutrient...
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...
This study presents a new algorithm to dealias folded Doppler velocities in S, C, and X-Band radars using a new boundary detection technique on the raw velocity field as a whole, rather than the traditional gate by gate methodology used...
Determining the Characteristics of Anvil and Thunderstorm Lightning for Use in the Lightning Launch Commit Criteria at Cape Canaveral Air Force Station and Kennedy Space Center
The 45th Weather Squadron (45WS) provides weather support to America's space program at Florida's Cape Canaveral Air Force Station (CCAFS), Kennedy Space Center (KSC), and Patrick Air Force Base (PAFB). Since CCAFS/KSC lies within...
A numerical study of the influence of two-wave bottom topography on baroclinic and barotropic annulus flows
Description:
Quon's (1976) three dimensional semi-spectral, semi-grid point numerical model, simulating the thermally driven annulus experiments with flat bottom conducted at Florida State University's Geophysical Fluid Dynamics Institute, has been... These numerical simulations agree qualitatively with the laboratory experiments, in that as the rotation rate increases, the zonal jet changes from a single to a double jet structure and the upstream displacement of the topographically... Our numerical simulations of baroclinic flows over two-wave topography have also captured the major features found in the laboratory experiments. In particular, topographically induced wave number 2 is found to be the dominant wave at...
In the uppermost millimeters of shallow marine sands, photosynthesis by microalgae can cause oxygen supersaturation, leading to formation of oxygen bubbles and subsequent ebullition of the gas from the sediment. The role of ebullition...
Sensitivity of a Bangladesh cyclone to surface parameters
Description:
In April 1991, tropical cyclone 02B (TC02B) devastated the coastal city of Chittagong, Bangladesh and caused 138, 000 deaths. This cyclone was one of the most severe storms in the Bay of Bengal. Although this region can be considered the... In order to study the effects of these parameters, a series of sensitivity experiments were performed using the Florida State University (FSU) limited-area model with 15 layers. The domain of study is between latitude 6$\sp\circ$S to 41$... Sea-surface temperature had significant effects on the development and movement of TC02B. Latent heat flux was the main source of energy from the surface, especially over the ocean. Changes in surface parameters that affected latent heat...
The geostationary satellite television (TV) signals that are reflected off the ocean surfaces could enter the AMSR-E antenna, resulting in RFI (Radio Frequency Interference) contamination in AMSR-E 10.65 and 18.7 GHz channels. If not...
ABSTRACT This work presents turbulence data collected in the Gulf of Mexico in an attempt to quantify the source or sources of turbulent dissipation along the continental shelf and any possible causes for its seasonal change. In addition...
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.
