I am fascinated by major climatic changes within Earth’s history, where major events caused hemispheric and global variability. Some of these climatic time periods occur during the recent post-industrial warming, the deglaciation of North America (12,000 – 18,000 years ago), and the last glacial period (10,000 – 120,000 years ago). Particularly, I find the complex relationships between the cryosphere, geosphere, hydrosphere, and biosphere fascinating as these affect carbon cycling. To assess these relationships I have employed a variety of methods including dust-particle analysis, trace element biogeochemistry, methane gas measurements, and glacial geomorphological field mapping. I have completed field work in Canada, Iceland, New York State (Adirondacks), and Alaska (Juneau Icefield).
Publications
Chesler, A, Koffman, BG, Kreutz, KJ, Osterberg, EC, Winski, D, Ferris DG, Thundercloud, ZR, Cole-Dai, J, Harmon N, Insolation-driven Southern Hemisphere Holocene warming led to westerly wind strengthening. Submitted to Geophysical Research Letters, August 2023.
Chesler, A., Winski, D., Kreutz, K., Koffman, B., Osterberg, E., Ferris, D., Thundercloud, Z., Mohan, J., Cole-Dai, J., Wells, M., Handley, M., Putnam, A., Anderson, K., and Harmon, N., 2023, Non-spherical microparticle shape in Antarctica during the last glacial period affects dust volume-related metrics: Clim. Past, v. 19, no. 2, p. 477-492.
Burns, R., Wynn, PM., Barker, P., McNamara, N., Oakley, S., Ostle, N., Stott, AW., Tuffen, H., Zhou, Z., Tweed, FS., Chesler, A., Stuart, M., 2018, Direct isotopic evidence of biogenic methane production and efflux from beneath a temperate glacier, Scientific Reports, v. 8, p. 1-8, DOI: 10.1038/s41598-018-35253-2.