A5083203012- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Geological and Tectonic Studies in Latin America
- Isotope Analysis in Ecology
- Tree-ring climate responses
- Metabolomics and Mass Spectrometry Studies
- Climate change and permafrost
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
University of Maine
2017-2019
Abstract. We present a 2700-year annually resolved chronology and snow accumulation history for the Roosevelt Island Climate Evolution (RICE) ice core, Ross Ice Shelf, West Antarctica. The core adds information on past changes in an otherwise poorly constrained sector of timescale was constructed by identifying annual cycles high-resolution impurity records, it constitutes top part Core Chronology 2017 (RICE17). Validation volcanic methane matching to WD2014 from WAIS Divide shows that two...
Abstract The Volcanic Explosivity Index 5 eruption of the Puyehue‐Cordón Caulle volcanic complex (PCC) in central Chile, which began 4 June 2011, provides a rare opportunity to assess rapid transport and deposition sulfate ash from midlatitude volcano Antarctic ice sheet. We present sulfate, microparticle concentrations fine‐grained (~5 μm diameter) tephra, major oxide geochemistry, document depositional sequence products PCC West snow shallow firn. From phasing duration peaks, we infer that...
Abstract Volcanic ash (tephra) provides unique time markers (isochrons) that are often used as an independent age‐control tool for stratigraphic correlations of paleoclimate archives from ice cores. However, little credence has been given to the notion finding tephra in cores collected European Alps because relatively large distance volcanic sources and presumed nature regional atmospheric circulation patterns. We filtered particles melted core drilling chips gathered roughly every meter...