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Constrain Paleo pO2 Using One Dimensional Reactive Transport Chromium/Iron Weathering Model
(Georgia Institute of Technology, 2021-08-02)
Quantitatively constraining atmospheric oxygen level (pO2) in the Proterozoic has been a long time struggle in the study of paleoclimate and biogeochemistry. An accurate reconstruction would benefit our understanding towards ...
EVIDENCE FOR AN OLIGOCENE YARLUNG-BRAHMAPUTRA CONNECTION AND CROSS SUTURE DRAINAGE FROM DETRITAL ZIRCON U-Pb AND εHf PROVENANCE ANALYSIS, NORTHERN INDO-BURMAN RANGES
(Georgia Institute of Technology, 2022-05-03)
The reorganization of continental-scale river systems is a fundamental control on the size and distribution of sedimentary basins along tectonically active plate boundaries. In the eastern Himalaya, river reorganization ...
DYNAMICAL IMPACT OF THE MEKONG RIVER PLUME IN THE SOUTH CHINA SEA
(Georgia Institute of Technology, 2021-05-04)
Near the ocean surface, river plumes influence stratification, buoyancy and transport of biological tracers, nutrients and pollutants. The extent to which river plumes influence the overall circulation, however, is generally ...
Interactions between reactive nitrogen and manganese: Implications for marine nitrous oxide cycling
(Georgia Institute of Technology, 2020-04-25)
Nitrous oxide (N2O) is a potent greenhouse gas that can destroy stratospheric ozone. Production and consumption of N2O has long been assumed to be controlled solely by nitrogen-metabolizing microbes. It has recently been ...
Subsurface Sediment Mobilization on Mars: Insights Provided by Orbital Remote Sensing Datasets
(Georgia Institute of Technology, 2021-08-24)
Mud volcanism, a specific type of subsurface sediment mobilization process known to occur on Earth, has been suggested to explain the formation of morphologically diverse edifices across the surface of Mars. Previous studies ...
Speciation and Recovery of Rare Earth Elements (REEs) from Coal Fly Ash
(Georgia Institute of Technology, 2022-05-05)
Recovery of rare earth elements (REEs) from coal fly ash (CFA) is a promising resource recovery and waste recycling option that might bring about significant economic and environmental benefits. However, many challenges ...
Satellite constraints on source-specific nitrogen oxide emissions and isoprene chemistry in the southeast united states: evaluations and implications for background ozone
(Georgia Institute of Technology, 2021-07-29)
Nitrogen oxides (NOx = NO + NO2) originating from combustion, lightning and soil, are the main drivers of the tropospheric ozone formation and important precursors of secondary organic aerosols, with consequences for human ...
Summertime ozone pollution in China: Observations and Simulations
(Georgia Institute of Technology, 2020-03-17)
Ground-level ozone is a secondary atmospheric pollutant that damages human and vegetation health. The chemical production of ground-level ozone involves the photochemical reactions between nitrogen oxides (NOX = NO + NO2) ...
Importance of manganese oxides in carbon remineralization in river-dominated continental margins and the biogeochemical cycling of arsenic
(Georgia Institute of Technology, 2020-03-25)
Manganese oxides (MnO2) are ubiquitous in the environment and play an important role in the transformation and transport of contaminants in the environment and the biogeochemical cycling of carbon. This study investigated ...
Europa's Surface and Shallow Water: Ice Shell Activity and Implications for Habitability
(Georgia Institute of Technology, 2022-05-02)
Beneath the geologically complex ice shell of Europa, Jupiter’s innermost icy satellite, likely lies a vast, saline subsurface ocean that may hold conditions favorable for life. Key to that question is how processes in the ...