Christine Downs
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View article: Magnetogram-matching Biot–Savart Law and Decomposition of Vector Magnetograms
Magnetogram-matching Biot–Savart Law and Decomposition of Vector Magnetograms Open
We generalize a magnetogram-matching Biot–Savart law (BS l ) from planar to spherical geometry. For a given coronal current density J , this law determines the magnetic field whose radial component vanishes at the surface. The superp…
View article: Unlocking Solutions: Innovative Approaches to Identifying and Mitigating the Environmental Impacts of Undocumented Orphan Wells in the United States
Unlocking Solutions: Innovative Approaches to Identifying and Mitigating the Environmental Impacts of Undocumented Orphan Wells in the United States Open
In the United States, hundreds of thousands of undocumented orphan wells have been abandoned, leaving the burden of managing environmental hazards to governmental agencies or the public. These wells, a result of over a century of fossil fu…
View article: Aerial imagery dataset of lost oil wells
Aerial imagery dataset of lost oil wells Open
Orphaned wells are wells for which the operator is unknown or insolvent. The location of hundreds of thousands of these wells remain unknown in the United States alone. Cost-effective techniques are essential to locate orphaned wells to ad…
View article: Harnessing Machine Learning and Data Fusion for Accurate Undocumented Well Identification in Satellite Images
Harnessing Machine Learning and Data Fusion for Accurate Undocumented Well Identification in Satellite Images Open
This study utilizes satellite data to detect undocumented oil and gas wells, which pose significant environmental concerns, including greenhouse gas emissions. Three key findings emerge from the study. Firstly, the problem of imbalanced da…
View article: LYNM PE1 Pre-Experiment A Site Characterization Report
LYNM PE1 Pre-Experiment A Site Characterization Report Open
Underground chemical explosive experiments such as LYNM PE1 generate large multiphenomenological datasets, require complex site preparation and build out, and utilize cutting edge models and analysis techniques to analyze and simulate the …
View article: Material Property Determinations for Rock Valley Legacy Samples in Support of Source Physics Experiment
Material Property Determinations for Rock Valley Legacy Samples in Support of Source Physics Experiment Open
The Source Physics Experiment (SPE) is a long-term NNSA research and development effort designed to improve nonproliferation verification and monitoring capabilities. The overarching goals of the SPE program are to improve understanding of…
View article: Hydraulic redistribution in mangroves: time-lapse electrical resistivity reveals diel patterns of subsurface salt mobilization consistent with exchange of water between trees and sediments
Hydraulic redistribution in mangroves: time-lapse electrical resistivity reveals diel patterns of subsurface salt mobilization consistent with exchange of water between trees and sediments Open
A 24-hour 2D time-lapse electrical resistivity imaging (ERI) survey was conducted in an altered mangrove forest on a barrier island in southeast Florida, USA, to (1) assess the method’s utility in hypersaline conditions and (2) understand …
View article: Hydraulic redistribution in mangroves: time-lapse electrical resistivity reveals diel patterns of subsurface salt mobilization consistent with exchange of water between trees and sediments
Hydraulic redistribution in mangroves: time-lapse electrical resistivity reveals diel patterns of subsurface salt mobilization consistent with exchange of water between trees and sediments Open
Earth and Space Science Open Archive This is a preprint and has not been peer reviewed. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are…
View article: Basin and Range Investigation for Developing Geothermal Energy: Exploration Data
Basin and Range Investigation for Developing Geothermal Energy: Exploration Data Open
This data package includes exploration material from the Basin & Range Investigation for Developing Geothermal Energy [in Hidden Systems] project (BRIDGE), which is part of a broader initiative to advance the exploration of hidden geotherm…
View article: The Peculiar Hydrology of West-Central Florida’s Sandhill Wetlands, Ponds, and Lakes – Part 2: Hydrogeologic Controls
The Peculiar Hydrology of West-Central Florida’s Sandhill Wetlands, Ponds, and Lakes – Part 2: Hydrogeologic Controls Open
This study investigates hydrogeologic controls on a peculiar, poorly studied type of geographically isolated wetland in west-central Florida, USA, locally referred to as “sandhill wetlands.” Their peculiarity lies in their connectivity to …
View article: Integrated Approach to Investigating Historic Cemeteries
Integrated Approach to Investigating Historic Cemeteries Open
Ground-penetrating radar (GPR) and terrestrial laser scanning (TLS) surveys were conducted at a historic cemetery at Cape Canaveral Air Force Station, Florida, U.S., in order to confirm the presence of burials corresponding to grave marker…
View article: Relationships between Sinkhole-related features and activity and InSAR-detected Subsidence Points in West Central Florida
Relationships between Sinkhole-related features and activity and InSAR-detected Subsidence Points in West Central Florida Open
Sinkholes in west-central Florida are usually formed from the erosion of overlying soil and sediment into open fissures of dissolved limestone bedrock. They are one of the leading natural disasters in the area, and therefore, precursory de…
View article: Spatial and temporal imaging of a cover-collapse sinkhole in west-central Florida through high resolution remote sensing and geophysical techniques
Spatial and temporal imaging of a cover-collapse sinkhole in west-central Florida through high resolution remote sensing and geophysical techniques Open
On July 14, 2017, a cover-collapse sinkhole formed in the front yard of a home in Pasco County, FL. Starting as a depression, the initial collapse occurred rapidly (120 minutes) with subsequent slumping over the course of three days. The s…
View article: <em>YOU</em> Should Advocate for Science
<em>YOU</em> Should Advocate for Science Open
Are you engaged in rigorous science? If so, ask your elected representatives to fund it robustly and predictably and to oppose policies that impede scientific progress.
View article: Assessment of Hydrogeological Controls on Sandhill Wetlands in Covered Karst Using Ground Penetrating Radar
Assessment of Hydrogeological Controls on Sandhill Wetlands in Covered Karst Using Ground Penetrating Radar Open
Sandhill wetlands are one of many types of karst-controlled wetlands and are defined by their isolated position in sandy upland environments. Ground penetrating radar (GPR) data were collected at a sandhill wetland in west-central Florida …
View article: Electromagnetic Prediction and Propagation
Electromagnetic Prediction and Propagation Open
An electromagnetic finite volume forward solver is implemented to create a suite of forward models that provide the expected response for an air-filled buried structure constructed of concrete and rebar. Model parameters considered are the…