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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.
Over the past few decades, Southeast Australia has experienced severe regional climatic events, including devastating floods and some of the most extreme droughts on record, linked in part to influences from both the El Niño Southern...
An atmospheric model is coupled to a sea surface temperature algorithm that calculates the diurnal variability in order to understand the responses to near surface winds and boundary layer temperature, pressure, and moisture in the north...
To better constrain the timing of panda's dietary shift from omnivorous to bamboo-exclusive herbivores, this study analyzed stable isotopes of carbon and oxygen in tooth enamel samples from two pygmy pandas from Yanliang Cave (early...
An objective index of the onset and demise of the Indian summer monsoon (ISM) is introduced. This index has the advantage of simplicity by using only one readily available variable, All-India rainfall (AIR), which has been reliably...
The study conducted U-Pb isotopic dating of the pitchblende mineralization of the Coles Hill uranium deposit in Pittsylvania County, VA. The ore body is found along the Chatham fault and within the Martinsville Igneous Complex. In...
The Abbotsford 7.5’ quadrangle resides entirely within the Dadeville complex, a volcanic arc complex located in the Alabama-Georgia Inner Piedmont region of the southern Appalachian mountain belt system. The Dadeville complex has been...
Integrated kinetic energy (IKE) is a recently developed metric that approximates the destructive potential of a tropical cyclone by assessing the size and strength of its wind field. Despite the potential usefulness of the IKE metric, ...
Tropical atmospheric waves play a major role in the variability and change of weather and climate in the tropics as well as in the globe. They also interact with other tropical systems such as tropical cyclones (TCs) and El Niño-Southern...
Mesoscale convective systems (MCSs) provide much of the annual rainfall over central equatorial Africa (CEA) during the March-April-May (MAM) and September-October-November (SON) rainy seasons. The characteristics and propagation of...
In the presence of water vapor, photolysis of tropospheric ozone (O3) produces the hydroxyl radical (OH), which is a strong oxidant that directly and indirectly controls a host of greenhouse gases and air pollutants. When tropospheric O3...
The major elements, trace elements, and isotopic composition of clinopyroxene and garnet fractions from mantle xenoliths from Colorado Plateau area were analyzed in this study to examine the sources of the xenoliths and their role in...
Marine ecosystems are increasingly threatened by human activities, highlighting the urgent need for effective conservation strategies. This dissertation focuses on the hawksbill turtle (Eretmochelys imbricata) in Brazil as a case study...
Rossby waves are waves in potential vorticity that propagate along the extratropical tropopause and can be impacted by the advection of low-PV air originating from the subtropics. In this study, the subtropical precipitation influence on...
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 ...
The Southern Ocean (SO) is one of the most productive oceanic regions in the world. Despite a high abundance of macronutrients such as nitrate and phosphorus, some areas have a surprisingly low amount of phytoplankton biomass. These...
The Late Miocene brought a sudden increase in the biomass of C4 plants that resulted in an expansion of grassland habitat and markedly changed the diets of vertebrate fauna in many places around the world. Concurrently, early pulses of...
This study develops nudging methods of data assimilation that will expand the utility of the forthcoming GOES-R satellite series by including data from the Geostationary Lightning Mapper (GLM) and Advanced Baseline Imager (ABI). We...
Understanding and predicting the inner-core structure and intensity change of tropical cyclones (TCs) remains one of the biggest challenges in tropical meteorology. This study addresses this challenge by investigating the formation, ...
The state of Florida annually approves 7.4×105 hectares (1.8×106 acres) of prescribed fires, and the production of particulate matter (PM) may cause health issues for neighboring communities. Incomplete combustion of biomass leads to the...
Mercury Isotopic Composition of Fish, Including Gag Grouper (Mycteroperca microlepis) and Red Snapper (Lutjanus campechanus) as Constraints of Mercury Cycling in the Northern Gulf of Mexico
Mercury is a naturally occurring, pervasive element in the environment, with many chemical forms. Toxicology, environmental cycling and retention, and production of mercury by industrial processes and natural and manufactured emissions...
Mesoscale precipitation bands were investigated in 38 winter storms that impacted the northeast US between 2004 and 2015 in the GridRad reflectivity mosaic dataset and compared to simulated bands in the 12 km North American Mesoscale...
In recent decades, many research efforts focused on global climate change, multidecadal, decadal, interannual variability, and the increasing extreme events of sea surface temperature. In contrast, the continuous evolution of the...
The Jackson's Gap Group is a thin section (~3 km wide) of sheared, compositionally interlayered metamorphic rocks spanning from west Georgia to central Alabama, representing the southernmost extent of the Brevard Zone. The...
In groundwater modeling, the term "post audit" refers to a method of verifying simulated (predicted) data produced by a groundwater model against analogous measured data. According to Anderson et. al., (2015), evaluation of model...
Lake Jackson in Leon County Florida is a shallow perched dissolution lake, which sits above the Cody Scarp and is formed from the coalescence of sinkholes. Lake Jackson currently has two open sinkholes, Porter Sink and Lime Sink....
Deep convection is an important component of atmospheric circulations that affects many aspects of weather and climate. Therefore, improved understanding and realistic simulations of deep convection are critical to both operational and...
A novel method for assimilating precipitation observations into a numerical weather prediction model is presented and evaluated for a case study of a monsoon rainfall event over the Asian subcontinent. The method, known as physical...
This study explores extreme surface temperature events in Southern Hemisphere winter (June – August) from 1979 to 2011 and their relation with meridional mass circulation by using daily ERA-interim Re-Analysis data from European Center...
Northern high-latitude freshwater systems are an essential link between terrestrial and marine carbon cycles, transporting organic matter from ecosystems on land to the Arctic Ocean. However, polar regions are warming faster than the...
The objective of this study is to study spatial and temporal paleontological distributions as they relate to the histories of Ninetyeast Ridge and Broken Ridge from ODP Leg 121. This study is important for establishing connections...
Lane (2001) proposed that the flow from Lost Creek contributed to the discharge of Spring Creek Springs via an unverified conduit system similar to the verified conduit system that contributes flow to Wakulla Spring. In order to...
Trace gas analysis in Earth systems plays an important role in planetary research. Bernard (1976) and Whiticar (1999) proposed that biologically produced methane and thermogenically or geologically produced methane could be...
Carbonate sands are an integral part of coral reef environments but their role in the cycling of matter in the reef is understudied. Methods such as micro-profiling, core incubations, in-situ chamber incubations, and aquatic eddy...
This thesis revisited a previous topic on how the downstream and/or large-scale midlatitude response to a recurving TC potentially depends on the strength and/or location of the TC. This study differs from what Brannan and Chagnon (2020)...
The dissertation reports a series of hydrological studies that relates to seawater intrusion in a karst aquifer. In the Woodville Karst Plan (WKP), karst conduit system is well developed and directly open to the Gulf of Mexico that...
The eastern Indian Ocean is dynamic and rich in mesoscale eddy activity, and this complex circulation has implications for biological properties. The Argo Basin, south of Java and northwest of Australia, is located in the tropical...
The effects of mesoscale (50-1000km) sea surface temperature (SST) variability on tropical cyclones (TCs) are investigated with model simulations of an idealized TC as well as simulations of Hurricane Igor (2010) using the Weather...
Ecophysiological Responses of Phytoplankton to Environmental Cues - A Laboratory Approach: Effects of Growth Light Quality on Phytoplankton and an Assessment of Carbon Utilization in Karenia Brevis
Phytoplankton are primary producers in the marine food web, providing energy and matter for higher trophic levels by fixing CO2 and inorganic nutrients into biomass. This production of particulate organic matter by marine phytoplankton, ...
Understanding the chemical and biological innovation and evolution of the global ocean is pivotal in understanding the processes involved in the evolution and proliferation of early life on Earth and potentially habitable exoplanets....
Over the past few decades, numerical weather prediction (NWP) models (and by extension human forecasts) have evolved markedly due to better meteorological understanding, improved observations, data assimilation, physics parameterization, ...
Sinking particles transport organic carbon produced in the surface ocean to the ocean interior, leading to net storage of atmospheric CO2 in the deep ocean. The rapid growth of in situ imaging technology has the potential to...
Wave and wind direction effects on remote sensing measurements of ocean surface emissivity are investigated using a microwave radiometer in high wind conditions with a focus on tropical cyclones. Surface wind speed, which drives many...
International Ocean Discovery Program (IODP) Expedition 355 drilled two sites (U1456 and U1457) in Laxmi Basin, located in the eastern Arabian Sea. The primary objective of Expedition 355 is to better understand the impact that the...
Investigation and Interpretation of Variations in NE Gulf of Mexico Nannoplankton Assemblages Following the Macando Well Blowout: Months of August-November
The biodiversity and biomass of coccolithophore species observed in the NE Gulf of Mexico during the months of August through November from 2011 to 2013 are quite dynamic. Following the Macondo well blow out in 2010, analyses have been...
Permafrost is an area of ground which continually maintains temperatures below 0˚C and is found across arctic and sub-arctic regions, with 50% of the global soil carbon contained within permafrost storage banks (Trubl et al., 2016). In...
A comprehensive rainfall-based index of the Australian monsoon is created. This index is based on methodology previously used on the Indian subcontinent for determining the seasonality of the Indian monsoon. In order to create the...
This analysis investigates the relationship between Rossby wave breaking (RWB) and tropical cyclone (TC) activity on a variety of timescales in the northern hemisphere (NH). This will be done through a time series analysis between wave...
Vertical profiles of wind, potential temperature, and humidity within hurricanes are shown to exhibit approximately log-linear behavior within the near-surface layer and can therefore be used to estimate log-profile parameters in such an...
Although spheres and spheroids have been used extensively by researchers as convenient models to approximate "snowflakes" when computing their microwave scattering properties, recent research indicates that the scattering properties of...
Quantifying the Effects of Increased Storminess and Sea-Level Change on the Morphology of Sandy Barrier Islands along the Northwestern and Atlantic Coasts of Florida
The ability to accurately quantify shoreline variability along sandy beaches is essential in order to establish aggressive mitigation strategies, based on recent global climate change projections. This investigation employed a suite of...
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.
