Research Interests

My research focuses on developing and applying cosmogenic nuclide and accelerator mass spectrometry (AMS) methods to quantify Earth-surface processes, with strong links to geochemistry, geochronology, and nuclear forensics. I am particularly interested in (1) advancing analytical capabilities for cosmogenic and other radionuclides, including new measurement and sample preparation workflows for complex and/or high-activity matrices, (2) using in situ and meteoric cosmogenic nuclides (for example, 10Be, 26Al, and 36Cl) to constrain erosion, weathering, landscape evolution, and glacial history across diverse environments, and (3) translating these tools into robust, high-throughput datasets that improve the fidelity of fluvial, glacial, and coastal records for Earth system science and related applications.

Ph.D., Earth Sciences, Dalhousie University, 2013

B.S., Geology, Utah State University, 2005

B.S., Physics, Utah State University, 2005

Tanski, N. M., Pederson, J. L., Hidy, A. J., Rittenour, T. M., and Mauch, J. P., (2025), The Mystery of Baselevel Controls in the Incision History of the Central Colorado Plateau: AGU Advances, v. 6, no. 1, p. e2024AV001359.

Balco, G., Hidy, A. J., Struble, W. T., and Roering, J. J., (2024), Short communication: Cosmogenic noble gas depletion in soils by wildfire heating: Geochronology, v. 6, no. 1, p. 71-76.

Kjaer, K. H., Winther Pedersen, M., De Sanctis, B., De Cahsan, B., Korneliussen, T. S., Michelsen, C. S., Sand, K. K., Jelavic, S., Ruter, A. H., Schmidt, A. M. A., Kjeldsen, K. K., Tesakov, A. S., Snowball, I., Gosse, J. C., Alsos, I. G., Wang, Y., Dockter, C., Rasmussen, M., Jorgensen, M. E., Skadhauge, B., Prohaska, A., Kristensen, J. A., Bjerager, M., Allentoft, M. E., Coissac, E., PhyloNorway, C., Rouillard, A., Simakova, A., Fernandez-Guerra, A., Bowler, C., Macias-Fauria, M., Vinner, L., Welch, J. J., Hidy, A. J., Sikora, M., Collins, M. J., Durbin, R., Larsen, N. K., and Willerslev, E., (2022), A 2-million-year-old ecosystem in Greenland uncovered by environmental DNA: Nature, v. 612, no. 7939, p. 283-291.

Anderson, T. S., Hidy, A. J., Boyce, J. W., McCubbin, F. M., Tumey, S., Dudley, J. M., Haney, N. C., Bardoux, G., and Bonifacie, M., (2022), Development towards stable chlorine isotope measurements of astromaterials using the modified Middleton source of an accelerator mass spectrometer: International Journal of Mass Spectrometry, v. 477, p. 116849.

Christ, A. J., Bierman, P. R., Schaefer, J. M., Dahl-Jensen, D., Steffensen, J. P., Corbett, L. B., Peteet, D. M., Thomas, E. K., Steig, E. J., Rittenour, T. M., Tison, J. L., Blard, P. H., Perdrial, N., Dethier, D. P., Lini, A., Hidy, A. J., Caffee, M. W., and Southon, J., (2021), A multimillion-year-old record of Greenland vegetation and glacial history preserved in sediment beneath 1.4 km of ice at Camp Century: Proceedings of the National Academy of Sciences of the United States of America, v. 118, no. 13, p. e2021442118.

Balco, G., Blisniuk, K., and Hidy, A.J., (2019), Chlorine-36∕ beryllium-10 burial dating of alluvial fan sediments associated with the Mission Creek strand of the San Andreas Fault system, California, USA: Geochronology, v. 1, no. 1, p. 1-16.

Hidy, A. J., Brown, T. A., Tumey, S. J., Zimmerman, S. R. H., Gharibyan, N., Frank, M., and Bench, G., (2018a), A new Be AMS capability established at CAMS and the potential for large datasets: Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, v. 414, p. 126-132.

Matmon, A., Hidy, A. J., Vainer, S., Crouvi, O., Fink, D., Erel, Y., Horwitz, L. K., Chazan, M., and Team, A., (2015), New chronology for the southern Kalahari Group sediments with implications for sediment-cycle dynamics and early hominin occupation: Quaternary Research, v. 84, no. 1, p. 118-132.

Hidy, A. J., Gosse, J. C., Blum, M. D., and Gibling, M. R., (2014), Glacial-interglacial variation in denudation rates from interior Texas, USA, established with cosmogenic nuclides: Earth and Planetary Science Letters, v. 390, p. 209-221.

Hidy, A. J., Gosse, J. C., Pederson, J. L., Mattern, J. P., and Finkel, R. C., (2010), A geologically constrained Monte Carlo approach to modeling exposure ages from profiles of cosmogenic nuclides: An example from Lees Ferry, Arizona: Geochemistry Geophysics Geosystems, v. 11, no. 9.

For a full list, see Google Scholar profile:

https://scholar.google.com/citations?user=n5WzpiwAAAAJ&hl

• Institutional Award (PLS/CAMS), serving as SME during B177 chem lab construction (2025)
• Gold Award (GS), 2023 and 2024 post-det nuclear forensics exercises (2024)
• Directorate Award, Institutional Impact (PLS), realistic surrogate debris sample for multi-lab technical nuclear forensics (2024)
• DDS&T Excellence in Publication Award recipient for coauthoring Modern Methods for Characterization of historic core samples (2020)
• PLS Best Poster Award; 10th annual Postdoctoral Program Poster Symposium (AEED) (2017)