This dissertation seeks to constrain the rupture size and magnitude of tsunamigenic earthquakes through the inclusion of data from both traditional geodetic instruments and recently deployed open-ocean tsunami gauges. ...

Mining and processing of uranium ore, followed by improper disposal and aging nuclear waste infrastructure, have left behind a legacy of uranium contamination across the United States. Uranium bioreduction, an in situ ...

Manganese (Mn) oxides are among the most ubiquitous and reactive mineral phases in natural environments. They can significantly influence the cycling of critical nutrients (such as carbon and nitrogen), as well as the ...

A new, high-resolution record of benthic seawater Cd (Cdw) was generated from a Florida Straits-region sediment core. The record provides additional evidence for Cdw below modern values at this location during the Younger ...

Desert environments on Earth are colonized by organisms adapted to desiccation. We hypothesized that extreme and prolonged dryness might impart too great a challenge for microbial survival. To test this, we surveyed ...

The El Niño-Southern Oscillation (ENSO) represents the largest source of year-to-year global climate extremes. However, its sensitivity to external climate forcing, whether natural or anthropogenic, is difficult to assess ...

Natural earthquakes occur on faults. The relationship between fault zone structures and earthquake behaviors remains one of the most interesting problems in seismology. As an important tool to detect earthquakes and image ...

Atmospheric particle acidity, which is described by particle pH, has effects on aerosol formation, composition, and toxicity. It also has impacts on ecosystem and climate. During the past 15 years, NOx and SO2 emissions ...

I analyze landslides on Ceres using several quantitative approaches to constrain the composition and structure of the top few kilometers of Ceres’ crust. I focus on a subset of archetypal landslides classified morphologically ...