The reflectance spectrum of visible and near infrared light off of airless bodies in our Solar System gives us insight to surface mineralogy. However, this method of remote sensing is subjected to the space weathering effects of darkening and reddening optical spectra, along with changes to the depths of absorption bands over time. These optical changes are caused by nanophase iron blebs as a r...

Several oil spill simulation models exist in the literature, which are used worldwide to simulate evolution of an slick created from marine traffic, petroleum production, or other sources. These may range simple parametric calculations advanced, new-generation, operational, three-dimensional numerical models, coupled meteorological, hydrodynamic, and wave forecasting high-resolution with high p...

To improve bacterial removal, a traditional stormwater biofilter can be augmented with biochar, but it is unknown whether bacterial removal remains consistent as the biochar weathers during intermittent exposure to stormwater under dry-wet and freeze-thaw cycles. To examine the effect of weathering on bacterial removal capacity of biochar, we subjected biochar-augmented sand filters (or simplif...

ABSTRACT This paper investigates the ignitability and effectiveness of burning crude oil spills at sea with respect to type oil, weathering time, seawater emulsion content. In event an or fuel spill sea, in situ can be a practical method removing preventing it from reaching vulnerable coastlines. However, specific chemistry its resulting behavior dictates how well this works. order understand b...

Lithium (Li), the lightest of the alkali elements, has geochemical properties that include high aqueous solubility (Li is the most fluid mobile element) and high relative abundance in basalt-forming minerals (values ranking between 0.2 and 12 ppm). Li isotopes are particularly subject to fractionation because the two stable isotopes of lithium-7Li and 6Li-have a large relative mass difference (...

Although asteroid 4 Vesta and Vestoids have been believed to be the source of a group of basaltic meteorites called HEDs, there have been detailed spectral analyses on the spectral redness and the 506.5 nm absorption band, suggesting controversy on their space weathering processes and origins. In order to evaluate a possibility that such an apparent inconsistency may be explained by the space w...

[1] The basal regions of continental ice sheets are gaps in our current understanding of the Earth’s biosphere and biogeochemical cycles. We draw on existing and new chemical data sets for subglacial meltwaters to provide the first comprehensive assessment of sub‐ice sheet biogeochemical weathering. We show that size of the ice mass is a critical control on the balance of chemical weathering pr...

[1] While much of the dissolved organic carbon (DOC) within rivers is destined for mineralization to CO2, a substantial fraction of riverine bicarbonate (HCO3 ) flux represents a CO2 sink, as a result of weathering processes that sequester CO2 as HCO3 . We explored landscape-level controls on DOC and HCO3 flux in subcatchments of the boreal, with a specific focus on the effect of permafrost on ...

An understanding of the processes that control the behavior of major elements with respect to weathering profile is essential to calculate the mobility, redistribution, and mass fluxes of elements. Hence, this study aims to determine the geochemical mass balance, strain, elemental correlation, and transport in weathering profiles. We constructed three weathering profiles for the black shale of ...