This three-year, $384,577 project grant from the National Science Foundation's Division of Ocean Sciences, under the Geosciences program (CFDA 47.050), will support collaborative research to construct robust temperature and ice volume histories during the late Cretaceous and Cenozoic periods (approximately 77-0 million years ago). The University of Rochester will utilize benthic foraminiferal test compositions from sea floor sediments to develop proxy records of deep ocean temperatures, continental ice volume, and atmospheric carbon dioxide levels over this time span. Researchers will employ benthic foraminiferal magnesium/calcium, lithium, boron, and strontium to calcium ratios to separate temperature and carbonate saturation state influences on widely-used oxygen isotope proxies. One-million-year sample spacing will be used for calibrations, while a new higher-resolution record spanning the past 77 million years at approximately 200,000-year intervals will provide insights into covariation between deep ocean temperature and continental ice volume from the late Cretaceous to Cenozoic. Results from this research aim to enhance understanding of long-term changes in deep ocean temperatures and ice sheet variability in relation to atmospheric carbon dioxide concentrations.
Mod # | Description | Reason For Modification | Federal Obligation (Click to sort descending) | Date (Click to sort ascending) |
|---|---|---|---|---|
| Not listed | $384.6k | 7/7/22 |