IEDA
Project Information
Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core
Program:
WAIS Divide Ice Core
Description/Abstract
This award supports a project to perform continuous microparticle concentration and size distribution measurements (using coulter counter and state-of-the-art laser detector methods), analysis of biologically relevant trace elements associated with microparticles (Fe, Zn, Co, Cd, Cu), and tephra measurements on the WAIS Divide ice core. This initial three-year project includes analysis of ice core spanning the instrumental (~1850-present) to mid- Holocene (~5000 years BP) period, with sample resolution ranging from subannual to decadal. The intellectual merit of the project is that it will help in establishing the relationships among climate, atmospheric aerosols from terrestrial and volcanic sources, ocean biogeochemistry, and greenhouse gases on several timescales which remain a fundamental problem in paleoclimatology. The atmospheric mineral dust plays an important but uncertain role in direct radiative forcing, and the microparticle datasets produced in this project will allow us to examine changes in South Pacific aerosol loading, atmospheric dynamics, and dust source area climate. The phasing of changes in aerosol properties within Antarctica, throughout the Southern Hemisphere, and globally is unclear, largely due to the limited number of annually dated records extending into the glacial period and the lack of a
tephra framework to correlate records. The broader impacts of the proposed research are an interdisciplinary approach to climate science problems, and will contribute to several WAIS Divide science themes as well as the broader paleoclimate and oceanographic communities. Because the research topics have a large and direct societal relevance, the project will form a centerpiece of various outreach efforts at UMaine and NMT including institution websites, public speaking, local K-12 school interaction, media interviews and news releases, and popular literature. At least one PhD student and one MS student will be directly supported by this project, including fieldwork, core processing, laboratory analysis, and data interpretation/publication. We expect that one graduate student per year will apply for a core handler/assistant driller position through the WAIS Divide Science Coordination Office, and that undergraduate student involvement will result in several Capstone experience projects (a UMaine graduation requirement). Data and ideas generated from the project will be integrated into undergraduate and graduate course curricula at both institutions.
Personnel
Person Role
Koffman, Bess Investigator
Kreutz, Karl Co-Investigator
Hamilton, Gordon S. Co-Investigator
Breton, Daniel Co-Investigator
Dunbar, Nelia Investigator
Funding
Antarctic Glaciology Award # 0636740
Antarctic Glaciology Award # 0636767
Data Management Plan
None in the Database
Publications
  1. Koffman, B.G., Kreutz, K.J., Kurbatov, A.V. and Dunbar, N.W. 2013. Impact of known local and tropical volcanic eruptions of the past millennium on the WAIS Divide microparticle record. Geophysical Research Letters, 40(17), p. 4712-4716. doi: 10.1002/grl.50822. (doi:10.1002/grl.50822)
  2. Koffman, B. G., Dowd, E. G., Osterberg, E. C., Ferris, D. G., Hartman, L. H., Wheatley, S. D., … Yates, M. (2017). Rapid transport of ash and sulfate from the 2011 Puyehue-Cordón Caulle (Chile) eruption to West Antarctica. Journal of Geophysical Research: Atmospheres, 122(16), 8908–8920. (doi:10.1002/2017jd026893)
  3. Lee, M. J., Kyle, P. R., Iverson, N. A., Lee, J. I., & Han, Y. (2019). Rittmann volcano, Antarctica as the source of a widespread 1252 ± 2 CE tephra layer in Antarctica ice. Earth and Planetary Science Letters, 521, 169–176. (doi:10.1016/j.epsl.2019.06.002)