Explanipedia

Methane–Natural Clay Interfacial Interactions as Revealed by High-Pressure Magic Angle Spinning (MAS) Nuclear Magnetic Resonance (NMR) Spectroscopy Open

Salim Ok, Julia M. Sheets, Susan A. Welch, David R. Cole · 2025

The current investigation aims to offer fundamental, molecular- to microscopic-level descriptions of methane gas inside natural source clay minerals. Texas montmorillonite (STx-1), Georgia kaolinite (KGa-2), and Ca2+-saturated Texas montmo…

Methane – Natural Clay Interfacial Interactions as Revealed by High-Pressure Magic Angle Spinning (MAS) Nuclear Magnetic Resonance (NMR) Spectroscopy Open

Salim Ok, David R. Cole, Julia M. Sheets, Susan A. Welch · 2024

The present study aims to provide fundamental, molecular- to microscopic-level descriptions of methane gas within natural source clay minerals. Texas montmorillonite (STx-1), Georgia kao-linite (KGa-2), and Ca2+ saturated Texas montmorillo…

Geochemistry of urban waters and their evolution within the urban landscape Open

Devin F. Smith, Susan A. Welch, A. H. Rankin, Anne E. Carey, W. Berry Lyons · 2024

Urban populations and the sprawl of urban environments are increasing in the United States as well as globally. The local hydrologic cycle is directly impacted by urban development through greater generation of surface runoff and export of…

Wide-ranging timescales of subsurface phosphorus transport from field to stream in a tile drained landscape Open

Larry E. Decker, Audrey H. Sawyer, Susan A. Welch, Junfeng Zhu, Andrew Binley , et al. · 2024

In agricultural areas with poorly drained soils, subsurface tile drains are commonly installed to improve drainage but also serve as conduits that deliver excess nutrients to adjacent streams. Our goal was to understand the transport of ph…

Anomalous subsurface phosphorus transport from field to stream in a tile drained landscape: Tracer experiment and models Open

Audrey H. Sawyer, Lauren Decker, Susan A. Welch, Junfeng Zhu, Andrew Binley , et al. · 2024

In agricultural areas with poorly drained soils, subsurface tile drains are commonly installed to improve drainage but also serve as conduits that deliver excess nutrients to adjacent streams. Our goal was to understand the transport of ph…

Importance of Dense Aquatic Vegetation in Seasonal Phosphate and Particle Transport in an Agricultural Headwater Stream Open

Hannah R. Field, Audrey H. Sawyer, Susan A. Welch, Ryan K. Benefiel, Devan M. Mathie , et al. · 2023

Agricultural headwater streams and ditches commonly host dense stands of aquatic vegetation that grow and decay over seasons and exert physical and biological controls on the transport of nutrients from cropland to larger rivers. This stud…

Nutrient concentrations and nitrogen speciation in tropical watersheds of central Panama Open

Ozeas Costa, W. Berry Lyons, Russell S. Harmon, Anne E. Carey, Susan A. Welch , et al. · 2023

We present chemical analyses from rivers and streams in five partly to near-fully forested watersheds in the humid tropics of central Panama. Contrary to the situation observed for temperate watersheds in the Northern Hemisphere, the conce…

Chemical and isotopic evolution of flowback fluids from the Utica Gas Shale Play, Eastern Ohio USA Open

Susan A. Welch, Julia M. Sheets, Elsa Saelans, Matthew R. Saltzman, Sean M. Newby , et al. · 2022

Phosphorus and Fine Particle Retention in Agricultural Headwater Streams Open

Hannah R. Field, Audrey H. Sawyer, Susan A. Welch, Ryan K. Benefiel, Devan M. Mathie , et al. · 2022

In many poorly drained agricultural regions, humans have introduced expansive networks of subsurface tile drains and straightened headwater streams to improve drainage. These networks serve as a direct link between cropland and la…

The geochemistry of Irish rivers Open

W. Berry Lyons, Anne E. Carey, Christopher B. Gardner, Susan A. Welch, Devin F. Smith , et al. · 2021

Study region: Ireland Study focus: Multiple studies have established that catchment geology and weathering regime strongly influence surface water chemistry, and that geochemical cycling can vary due to seasonal climatic conditions. Howeve…

Geochemical zones and environmental gradients for soils from the central Transantarctic Mountains, Antarctica Open

Melisa A. Diaz, Christopher B. Gardner, Susan A. Welch, W. Andrew Jackson, Byron J. Adams , et al. · 2021

Previous studies have established links between biodiversity and soil geochemistry in the McMurdo Dry Valleys, Antarctica, where environmental gradients are important determinants of soil biodiversity. However, these gradients are not well…

Comparative geochemistry of flowback chemistry from the Utica/Point Pleasant and Marcellus formations Open

Susan A. Welch, Julia M. Sheets, Rebecca A. Daly, Andrea Hanson, Shikha Sharma , et al. · 2021

Determining mineralogy, size, and number concentration of individual aeolian nano- and micro- dust particles measured by single particle-ICPMS in East Antarctic ice during the last climatic cycle Open

Madeleine Lomax-Vogt, Olesik John, Paolo Gabrielli, Cole Bradley, Aja Ellis , et al. · 2021

Multi-instrumental characterization of atmospheric nanoparticles entrapped in ancient glacier ice Open

Paolo Gabrielli, Olesik John, Cole Bradley, Madeleine Lomax-Vogt, Hendrik Colijn , et al. · 2021

The geochemistry of ice in the southeastern Alps, Slovenia Open

Anne E. Carey, Devin F. Smith, Susan A. Welch, Matija Zorn, Jure Tičar , et al. · 2020

The Triglav Glacier in the Julian Alps and the Skuta Glacier in the Kamnik-Savinja Alps are among the south-easternmost glaciers in the Alps. Historical data show that ice masses are undergoing mass loss as the overall climate warms. Glaci…

Geochemical zones and environmental gradients for soils from the Central Transantarctic Mountains, Antarctica Open

Melisa A. Diaz, Christopher B. Gardner, Susan A. Welch, W. Andrew Jackson, Byron J. Adams , et al. · 2020

Previous studies have established links between biodiversity and soil geochemistry in the McMurdo Dry Valleys, Antarctica, where environmental gradients are important determinants of soil biodiversity. However, these gradients are not well…

Geochemical Changes in Response to CO2 Injection in a CO2-EOR Complex in Northern Michigan Open

Neeraj Gupta, Matt Place, Jared Hawkins, Benjamin Grove, Laura Keister , et al. · 2020

The overall purpose of the geochemical monitoring program under Midwestern Regional Carbon Sequestration Partnership (MRCSP) is to use stable and radiogenic isotope geochemistry in concert with analysis of general geochemical parameters of…

Geochemical Changes in Response to CO2 Injection in a CO2-EOR Complex in Northern Michigan (Volume II.1) Open

Matthew Place, Jared Hawkins, Ben Grove, Laura Keister, Julie Sheets , et al. · 2020

The Midwest Regional Carbon Sequestration Partnership (MRCSP) was founded in 2003 as part of the U.S. Department of Energy’s (DOE’s) Regional Carbon Sequestration Partnership initiative. Since its founding, MRCSP has made significant strid…

Fluid Behavior in Nanoporous Silica Open

Salim Ok, Bohyun Hwang, Tingting Liu, Susan A. Welch, Julia M. Sheets , et al. · 2020

We investigate dynamics of water (H₂O) and methanol (CH₃OH and CH₃OD) inside mesoporous silica materials with pore diameters of 4.0, 2.5, and 1.5 nm using low-field (LF) nuclear magnetic resonance (NMR) rel…

Stable Isotopes of Nitrate, Sulfate, and Carbonate in Soils From the Transantarctic Mountains, Antarctica: A Record of Atmospheric Deposition and Chemical Weathering Open

Melisa A. Diaz, Jianghanyang Li, Greg Michalski, Thomas H. Darrah, Byron J. Adams , et al. · 2020

Soils in ice-free areas in Antarctica are recognized for their high salt concentrations and persistent arid conditions. While previous studies have investigated the distribution of salts and potential sources in the McMurdo Dry Valleys, lo…

Silicon Isotopic Composition of Dry and Wet-Based Glaciers in Antarctica Open

Jade Hatton, Katharine Hendry, Catherine Hirst, Sophie Opfergelt, Susann Henkel , et al. · 2020

Glaciers and ice sheets export significant amounts of silicon (Si) to downstream ecosystems, impacting local and potentially global biogeochemical cycles. Recent studies have shown Si in Arctic glacial meltwaters to have an isotopically di…

Silicon Isotopes Reveal a Non-glacial Source of Silicon to Crescent Stream, McMurdo Dry Valleys, Antarctica Open

Catherine Hirst, Sophie Opfergelt, F. Gaspard, Katharine Hendry, Jade Hatton , et al. · 2020

In high latitude environments, silicon is supplied to river waters by both glacial and nonglacial chemical weathering. The signal of these two end-members is often obscured by biological uptake and/or groundwater input in the river catchme…

Uranium in Ohio, USA Surface Waters: Implications for a Fertilizer Source in Waters Draining Agricultural lands Open

W. Berry Lyons, Christopher B. Gardner, Susan A. Welch, Samantha Israel · 2020

The hydrogeochemistry of shallow groundwater from Lut Desert, Iran: The hottest place on Earth Open

W. Berry Lyons, Susan A. Welch, Christopher B. Gardner, Arash Sharifi, Amir AghaKouchak , et al. · 2020

Wetting behaviors of fluoroterpolymer fiber films Open

Salim Ok, Julia M. Sheets, Susan A. Welch, Tingting Liu, Savaş Kaya , et al. · 2020

Various aspects of electrospun fibers prepared from terpolymer of tetrafluoroethylene (TFE), hexafluoropropylene (HFP), and vinylidene fluoride (VDF) (THV)/acetone solutions at two applied voltages, THV/acetone solutions having Texas montm…

Validation of sampling antarctic subglacial hypersaline waters with an electrothermal ice melting probe (IceMole) for environmental analytical geochemistry Open

Laura German, Jill A. Mikucki, Susan A. Welch, Kathleen A. Welch, Anthony Lutton , et al. · 2019

Geochemical characterisation of hypersaline waters is difficult as high concentrations of salts hinder the analysis of constituents at low concentrations, such as trace metals, and the collection of samples for trace metal analysis in natu…

Genome-Resolved Metagenomics Extends the Environmental Distribution of the Verrucomicrobia Phylum to the Deep Terrestrial Subsurface Open

Sophie L. Nixon, Rebecca A. Daly, Mikayla Borton, Lindsey Solden, Susan A. Welch , et al. · 2019

The Verrucomicrobia phylum of bacteria is widespread in many different ecosystems; however, its role in microbial communities remains poorly understood. Verrucomicrobia are often low-abundance community members, yet previous research sugge…

Hydrate‐filled Fracture Formation at Keathley Canyon 151, Gulf of Mexico, and Implications for Non‐vent Sites Open

E. Oti, Ann E. Cook, Susan A. Welch, Julia M. Sheets, Dustin Crandall , et al. · 2019

Near‐vertical hydrate‐filled fractures are found in subseafloor marine muds, at both advective methane vent sites and at sites without obvious methane and fluid advection (non‐vent sites). At non‐vent sites, the mechanisms that transport m…

In situ transformation of ethoxylate and glycol surfactants by shale-colonizing microorganisms during hydraulic fracturing Open

Morgan V. Evans, Gordon J. Getzinger, Jenna L. Luek, Andrea Hanson, Molly McLaughlin , et al. · 2019

In the last decade, extensive application of hydraulic fracturing technologies to unconventional low-permeability hydrocarbon-rich formations has significantly increased natural-gas production in the United States and abroad. The injection…

Glaciochemistry of Cave Ice: Paradana and Snežna Caves, Slovenia Open

Anne E. Carey, Matija Zorn, Jure Tičar, Matej Lipar, Blaž Komac , et al. · 2019

Cave ice samples collected within karstic terrain have major ion and nutrient concentrations showing that the ice originates from local precipitation modified by the addition of Ca2+ and HCO3− from the dissolution of the local bedrock. Iso…

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