A5081694952- Geological and Geochemical Analysis
- Atmospheric aerosols and clouds
- Geochemistry and Geologic Mapping
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Astro and Planetary Science
- Calibration and Measurement Techniques
- High-pressure geophysics and materials
- Reservoir Engineering and Simulation Methods
- Space exploration and regulation
- Icing and De-icing Technologies
- Stellar, planetary, and galactic studies
- Urban Heat Island Mitigation
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Arctic and Antarctic ice dynamics
- Atmospheric chemistry and aerosols
- Climate change and permafrost
- Radioactivity and Radon Measurements
- Petroleum Processing and Analysis
University of Pittsburgh
2019-2024
University of Bristol
2011
The mineralogical and immersion-mode freezing properties of volcanic ashes from three volcanoes, Volcán de Fuego Santiaguito in Guatemala, Soufrière Hills Volcano, Montserrat, were examined. All (sieved to <37 μm) contained effective ice nuclei, typically over the temperature range −12 −25 °C possessing active site densities (ns) spanning ∼10 1 10 5 cm–2 this range. high activity was determined likely originate pyroxene minerals, nucleation minerals are also reported here for first time...
Understanding the composition, texture, and morphology of volcanic rocks that have erupted at surface better constrains eruption style is vital to infer subsurface processes, development magma upon ascent, potential for future eruptions. The reflectance emission spectroscopy these rocks, collected from near-infrared (NIR) through thermal infrared (TIR) portion electromagnetic (EM) spectrum, provides data necessary retrieve micron-scale roughness, particle size. Remote imaging systems enable...
Abstract First measurements of the emission lava worlds with James Webb Space Telescope (JWST) probe conditions on so hot that their surfaces are likely molten or partially molten. These observations provide a unique opportunity to explore rocky planets’ evolution. Surfaces world exoplanets can give insights into composition and interior workings. However, data spectral emissivity wide range potential exoplanet surface compositions temperatures is required understand JWST data. Here, we...
Abstract The Surface Biology and Geology (SBG) mission is part of the National Aeronautics Space Administration's planned Earth System Observatory. mid/thermal infrared (MIR/TIR) portion SBG will deliver high spatial temporal resolution data designed (in part) to answer fundamental volcano science questions, as outlined in 2018 Decadal Survey (DS). 60 m resolution, TIR saturation temperature (∼500 K), addition two MIR bands (∼800–1200 K) improve thermal feature variability detection across...
The ASTER Volcanic Ash Library (AVAL) is presented, developed using quantitative laboratory thermal infrared (TIR) emission spectroscopic methods, spanning the 2000–400 cm−1 (5–25 μm wavelength) range, including Earth’s TIR atmospheric window (8–12 μm). Each spectral suite unique owing to chemical composition and proportion of glass crystals per sample divided into six size fractions. AVAL, used with an appropriate mixture model applied orbital multispectral data, provides a ability study...
The 2020 eruption of the Nishinoshima volcano, Japan, emplaced new lava flows as well numerous ash plumes from explosive eruptions. Several these were imaged by Advanced Spaceborne Thermal Emission and reflection Radiometer (ASTER) part Urgent Request Protocol (URP) during July 2020. Linear spectral deconvolution was used to model ASTER thermal infrared (TIR) data using Volcanic Ash Library (AVAL), a library containing volcanic compositional particle size range end members. airborne plume...
Explosive volcanic eruptions have the potential to inject gases including sulphur dioxide (SO2) and silicate ash into upper lower stratospheres, which not only has climatic implications but also poses a significant hazard for aircraft flying at these altitudes. The effects of on engines main airframe are well documented although acidic less known, both species result in hazardous extremely costly damage. 2009 eruption Sarychev Peak, Kuril Islands, affected large number flights busy North...
Abstract Acquiring accurate high temperature laboratory‐based infrared emission spectra of geologic samples is important to constrain their radiative and spectral properties. This in calculations lava flow cooling, crust formation, ultimately propagation modeling. However, measuring at temperatures remains a challenge. A new micro‐furnace design was created integrate with Fourier transform spectrometer, replacing the previous furnace improving performance error metrics. Importantly, this...