Riverine Biogeochemistry

Fluvial networks play a fundamental role in the exchange of carbon between Earth’s major carbon reservoirs (soils, sediments and dissolved organic matter (DOM) in marine and terrestrial systems). A major focus in the lab is investigating the mechanistic controls on organic matter (OM) export and fate in major watersheds and adjacent coastal systems. Read more



Glacier Biogeochemistry

Glacier ecosystems cover approximately 10% of the Earth’s surface and contribute large volumes of runoff to rivers and the coastal ocean. The large water flux from glacier watersheds in coastal and high-latitude regions can lead to a substantial flux of dissolved organic matter (DOM) despite the typically low concentrations of DOM reported in glacier ice. Read more



Organic Matter Method Development

An enduring limitation to geochemical studies aiming to link climate or land-use change for example, to dissolved organic matter (DOM) flux or reactivity in aquatic systems has been the issue of both temporal and spatial scaling. Within the lab we have directed significant effort toward utilizing optical analyses (e.g. absorbance and fluorescence) as proxies for more intensive and expensive analytical analyses (e.g. molecular-level organic biomarkers). Read more