Project Information
Major Ion Chemistry of WAIS Divide Ice Core
WAIS Divide Ice Core

This award supports a project that will contribute to the US West Antarctica Ice Sheet Ice Divide ice core (WAIS Divide) project by developing new instrumentation and analytical procedures to measure concentrations of major ions (Cl-, NO3-, SO42-, Na+, K+, NH4+, Mg2+, Ca2+). A melter-based, continuous flow, multi-ion-chromatograph technique (CFA-IC) has been developed recently at South Dakota State University (SDSU). This project will further expand and improve the CFA-IC technique and instrumentation and develop procedures for routine analysis of major ions in ice cores. In addition, training of personnel (operators) to perform continuous, high resolution major ion analysis of the deep core will be accomplished through this project. The temporal resolution of the major ion measurement will be as low as 0.5 cm with the fully developed CFA-IC technique. At this resolution, it will be possible to use annual cycles of sulfate and sea-salt ion concentrations to determine annual layers in the WAIS Divide ice core. Annual layer counting using CFA-IC chemical measurements and other high resolution measurements will contribute significantly to the major WAIS Divide project objective of producing precisely (i.e., annually) dated climate records. The project will support the integration of research and education, train future scientists and promote human resource development through the participation of graduate and undergraduate students. In particular, undergraduate participation will contribute to a current REU (Research Experience for Undergraduates) chemistry site program at SDSU. Development and utilization of multi-user instrumentation will promote research collaboration and advance environmental science. NSF support for SDSU will contribute to the economic development and strengthen the infrastructure for research and education in South Dakota.
Person Role
Cole-Dai, Jihong Investigator
Antarctic Glaciology Award # 0538553
AMD - DIF Record(s)
Data Management Plan
None in the Database
Repository Title (link) Status
USAP-DC Major Ion Concentrations in WDC05Q and WDC06A Ice Cores (WAIS Divide) exist
  1. Sigl, M., Toohey, M., McConnell, J. R., Cole-Dai, J., & Severi, M. (2022). Volcanic stratospheric sulfur injections and aerosol optical depth during the Holocene (past 11,500 years) from a bipolar ice core array. (doi:10.5194/essd-2021-422)
  2. McConnell, J. R., Burke, A., Dunbar, N. W., Köhler, P., Thomas, J. L., Arienzo, M. M., … Winckler, G. (2017). Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion. Proceedings of the National Academy of Sciences, 114(38), 10035–10040. (doi:10.1073/pnas.1705595114)
  3. Lanciki, A., Cole-Dai, J., Thiemens, M. H., & Savarino, J. (2012). Sulfur isotope evidence of little or no stratospheric impact by the 1783 Laki volcanic eruption. Geophysical Research Letters, 39(1), n/a–n/a. (doi:10.1029/2011gl050075)
  4. Cole-Dai, J., D.G. Ferris, A.L. Lanciki, J. Savarino, and J.R. McConnell (2013) Two climate-impacting volcanic eruptions in the 1450s C.E. found in a bipolar, sub-annually dated 800-year ice core record, J. Geophys. Res., 118, 7459-7466. (doi:10.1002/jgrd.50587)
  5. Cole‐Dai, J., Ferris, D. G., Kennedy, J. A., Sigl, M., McConnell, J. R., Fudge, T. J., … Souney, J. M. (2021). Comprehensive Record of Volcanic Eruptions in the Holocene (11,000 years) From the WAIS Divide, Antarctica Ice Core. Journal of Geophysical Research: Atmospheres, 126(7). (doi:10.1029/2020jd032855)

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