I study past climates and environments using sediments from lakes, wetlands, and permafrost with an emphasis on water isotope tracers. The continuous records that I develop extend from the present through past decades, centuries, millennia, and previous glaciations and reflect hydroclimatic processes on global, regional, and local scales.
My main study areas are the North America cordilleran west, from Alaska to the southern Rockies. My main interests are to discover water isotope data which documents how and why changes in climate have affected alpine and arctic landscapes across space and through time. In addition to paleoclimatology and geochronological methods, my research also includes multiple perspectives from aspects of paleolimnology (lake sedimentology, geochemistry, hydrology), geomorphology, and the modern climatology of North Pacific ocean-atmosphere interactions.
Science and Products
Past Perspectives of Water in the West
Holocene Hydroclimate of Western North America
Science and Products
- Science
Past Perspectives of Water in the West
In the intermountain west, seasonal precipitation extremes, combined with population growth, are creating new challenges for the management of water resources, ecosystems, and geologic hazards. This research contributes a comprehensive long-term context for a deeper understanding of past hydrologic variability, including the magnitude and frequency of drought and flood extremes and ecosystem...Holocene Hydroclimate of Western North America
The objectives of this project are to reconstruct detailed histories of Holocene hydroclimate and corresponding environmental change from geological archives such as lake sediment, peat, and wood to more fully understand past, ongoing, and future change and its impacts. - Data
- Publications
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