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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.
After decades of research biogeochemists have identified several intervals of variable marine oxygenation throughout Earth's history. These fluctuations in oxygenation have been proposed to directly correlate to changes in ancient...
Organized convection is of critical importance in the tropical atmosphere. Recent advances in numerical modeling have revealed that moist convection can interact with its environment to transition from a quasi-random to organized state....
Many tropical cyclone studies have been conducted on basin-averaged potential intensity trends and the influence of sea surface temperatures (SSTs) on tropical cyclone intensity, but there is less research on along-track potential...
Late spring or early summer brings an abrupt onset of a wet season to Peninsular Florida (PF). High daily rain rates are sustained throughout the summer until the demise of the wet season in autumn. Prediction of the Peninsular Florida...
The advancement of numerical weather prediction (NWP) has hastened the effort to understand how moist processes -- many of which are parameterized in NWP models -- influence cyclone structure and intensity. Despite this effort, there...
Laboratory experiments on a rotating tank of fluid are used to study the fundamental aspects of geophysical fluid flows. The present set of experiments are an attempt to study the effect of a rectangular ridge on the flow of a rotating...
Peatlands contain a significant amount of the global soil carbon, but the climate feedback affecting carbon stability within these peatland systems is still relatively unknown. Organic matter composition of peatlands plays a major role...
Snow, another precipitation form besides rain, affects the Earth’s climate distinctly by modifying hydrological and radiative processes. The radiative properties of nonspherical snowflakes are much more complicated than their spherical...
Rare earth elements (REEs), yttrium and uranium are important industrial resources in many technology sectors; therefore, demand and production will likely continue to increase. Increased international market prices have led to new...
Due to climate change driven sea surface temperature (SST) increase, tropical and sub-tropical corals have been experiencing temperature stress. This stress has manifested itself in multiple ways, one of which being the 'tropicalization'...
For almost all climate variables, the annual cycle of a climate variable is often the most dominant component of that variable. Although such annual cycle is suggested to tie with the annual changes of the solar irradiance arriving at...
The Silurian was a dynamic time of climatic transition punctuated by multiple biotic crises and global carbon cycle perturbations. The most severe of these biotic crises was the late Silurian (Ludfordian) Lau/Kozlowskii extinction event ...
The objective of this study is to quantify barrier layer development due to tropical cyclone (TC) passage using Argo float observations of temperature and salinity. To accomplish this objective, a climatology of Argo float measurements...
Zooplankton play an important role in global biogeochemistry and their secondary production supports valuable fisheries of the world’s oceans. Coupled physical-biogeochemical models (PBMs) provide a unique oceanographic research tool for...
Synoptic scale drivers, mainly extra-tropical cyclones, account for a majority of the day to day temperature variability in the mid-latitudes. This variability is at its greatest in the Northern Hemisphere in Boreal winter when the...
Utilizing Indian Ocean Calcareous Nannofossil Biostratigraphy of Miocene Sediments to Investigate Tectonic and Climatic Forcing during the Evolution of the Himalayas
The geological history of Himalayans and Tibetan Plateau is important for understanding how our planet evolves, and how geological structures can have local and global effects on climate and floral and faunal evolution of a system. This...
Tectonostratigraphy, Geochemistry, and Geochronology of the Dadeville Complex of Alabama and Georgia: The Southern Appalachians Link to the Taconic Orogeny and Associated Suprasubduction System
Taconic orogenesis along the eastern Laurentian margin was a dynamic tectonic event during the Ordovician that has been difficult to reconcile until as of late. The record of the Taconic orogeny is complex, and each section of the...
The African Easterly Jet (AEJ) is one of the phenomena driving regional as well as global atmospheric circulation. Specifically, within the Sahel region, the AEJ and African Eastern Waves (AEWs) are main features that are linked and...
Atlantic Bluefin tuna (ABFT) (Thunnus thynnus) spawn in the warm oligotrophic regions of the Gulf of Mexico (GoM) where zooplankton biomass is on average low and highly variable. Consequently, their larvae are thought to be highly...
An accurate representation of air-sea interaction is crucial to the accurate numerical prediction of ocean, weather, and climate. It is known that sea surface temperature (SST) gradients and surface currents in the oceanic mesoscale...
In this thesis, we introduce a new approach to classify rain clouds based on the relationship between the emission signal and scattering signal derived from microwave brightness temperature data. Two parameters are used as indicators of...
Globally, karst ecosystems are experiencing anthropogenic impacts due to their high hydrologic connectivity, leading to issues including increasing color (browning) as noted in recent decades at the largest freshwater spring on Earth ...
The environmental impacts of COVID-19 and the “new normal” of working from home are being explored in the scientific community. However, there is currently no published study on the COVID-19 impacts to nitrate load via septic systems....
Karenia brevis is a marine dinoflagellate commonly found in the Gulf of Mexico and important both ecologically and economically due to its production of the neurotoxin brevetoxin, which can cause respiratory illness in humans and...
The United States Forest Service (USFS) bases their wildfire predictions on cloud-to-ground lightning flash density thresholds greater than 5 fl km-2. High flash densities and low precipitation are often emphasized with storms since they...
Disorganized, weakly forced convection is a routine summertime occurrence in the Southeast United States. Pulse severe storms are single cell thunderstorms that produce severe wind and/or severe hail for a brief period of time. These...
Analysis of Microbial Abundance, Metabolic Potential, and Transcriptional Activity in the Gulf of Mexico "Deadzone" Reveals an Ammonia-Oxidizing Archaeal Hotspot
The northern Gulf of Mexico (nGOM) is home to one of the largest eutrophication-driven seasonal hypoxic zones in the world. These hypoxic zones are also known as “dead zones” because dissolved oxygen (DO) concentrations of ≤ 2 mg L-1 are...
The Appalachian orogen is separated from west to east and into the Cumberland Plateau, Valley and Ridge, Blue Ridge, Inner Piedmont, and Carolina Superterrane physiographic provinces. Within the southern Appalachians of Alabama and...
The 10–20-day mode of surface winds is examined in the Indian Ocean, with special reference to the Arabian Sea, the Bay of Bengal, and the equatorial Indian Ocean during a strong (1994), weak (2002), and normal (1995) Indian summer...
Environmental legislation is a relatively new concept in the United States’ regulatory regime. High profile environmental disasters, including several in other countries, have underscored the challenges of effectively and efficiently...
Previous case studies have noted a significant extratropical flow response to recurving Atlantic tropical cyclones (TCs), which is often linked to extreme weather events downstream. This study examines the modification of Rossby waves on...
The ice shelves in the Western Antarctic have seen an increase in melt over the past decade, mainly due to basal melting induced by underlying warm, salty Circumpolar Deep Water. Seal data in the Bellingshausen Sea provides extensive...
The formation process by which sand becomes cemented with humate compounds to form humicrete is not well understood, likely due in part to limited exposures of this material around the world. Humicrete layers along the Intracoastal...
Each year, tropical cyclones (TCs) impact communities around the world by producing rainfall with devastating damage, loss of life and can contribute a non-trivial amount to climatological annual mean rainfall. The representation of TC...
New England (NE) Tropical Cyclones (TCs) can produce significant damage, as well as provide increased forecast track and intensity complexity for forecasters. This is the result of the fact that these TCs recurve, often undergo...
Until the past decade, IIAB iron meteorites were thought to have formed by fractional crystallization under low pressure, corresponding to an asteroidal sized (<200 km) parent body. Some recent physical models for the formation of early...
The cold blob refers to an observationally unprecedented, gyre-scale, record-breaking cold of mean surface temperature over the subpolar North Atlantic. Its anomalous cold feature goes against the rising trend of global mean surface...
Impacts of Microbial Community Structure on Denitrification Rates in the Rhizosphere of J. Roemerianus and S. Alterniflora in a Gulf of Mexico Mixed Marsh
Marshes are particularly important ecosystems, providing long-term soil carbon storage, flood protection and nutrient filtration. Nutrient filtering, specifically nitrate removal, is largely the result of belowground microbially mediated...
Investigation of Changes in Paleoceanographic Redox State as a Driver for Early Silurian Extinction Events Using Multiple Geochemical Proxies in the Baltic Basin
Two mudstone-dominated early Silurian drill cores from the Baltic Basin were analyzed for pyrite sulfur isotopes (δ34Spy), organic matter carbon isotopes (δ13Corg), as well as iron speciation and trace metal chemostratigraphy to...
At the same temperature, below 0oC, the saturation vapor pressure (SVP) over ice is slightly less than the SVP over liquid water. Numerical models use the Clausius-Clapeyron relation to calculate the SVP and relative humidity, but there...
Climate change is radically altering the Arctic. These alterations are expected to have immense and cascading implications on the carbon cycling of the region. In particular, our interest lies in the Kolyma River (KR) as it is the...
The size of a tropical cyclone (TC) is a critical structure parameter that is associated with the greatest extent of societal impacts, and it can be estimated by several different metrics depending on the variable used. In this study, a...
Extratropical cyclones are responsible for the generation of large amounts of latent andsensible heat fluxes over the ocean. These fluxes are the main mechanism by which the ocean influences the atmosphere. Extratropical cyclones that...
The Deepwater Horizon (DWH) blowout of 2010 released an estimated 4.5-4.9 million barrels of oil and 500, 000t of methane into the Gulf of Mexico (GOM). Some of this oil rose to the surface, forming oil slicks, while an estimated 30% of...
Atmospheric Mercury Wet Deposition along the Northern Gulf of Mexico: Seasonal and Storm-Type Drivers of Deposition Patterns and Contributions from Local and Regional Emissions
Continuous event-based rainfall samples were collected at three sites throughout the Pensacola airshed from 2005 - 2011. Samples were analyzed for total mercury (Hg), a suite of trace metals (TMs), and major ions in order to understand...
The annual cycle is a large scale climate process which influences smaller scale climate and meteorological processes. In this research, the annual cycle is defined by the climates response to Earth's orbit about the sun. In this...
The marine biological carbon pump is a primary control on atmospheric carbon dioxide concentrations by transporting fixed organic carbon into the ocean’s interior thereby isolating it from the atmosphere, often for years to centuries....
Inland waters receive significant inputs of organic and inorganic carbon (OC and IC) from terrestrial ecosystems. This water-borne carbon (C) is subsequently stored, processed, outgassed, or exported downstream depending a suite of...
The Mulberry Rock recess exposes four different lithotectonic metamorphic units; these lithotectonic units were metamorphosed before the thrusting that occurred due to the Alleghanian orogeny. The lithotectonic units were divided into 1....
The dissertation presents a series of hydrogeological studies related to mixing of lake water and groundwater in the Upper Florida aquifer system. In the study area located in the Northern Highland of Florida, two sinkholes were...
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.
