Project Grant 2536605
- This $358,360 Project Grant, awarded April 15, 2026, by the National Science Foundation (NSF) Division of Ocean Sciences under the Geosciences program (CFDA 47.050), supports collaborative research to improve amino acid racemization (AAR) geochronology methods for dating ancient marine shorelines. The primary deliverable is the calibration and standardization of AAR dating techniques by analyzing approximately 100 globally distributed, independently dated Last Interglacial sites (approximately...
- This Project Grant award from the National Science Foundation's Geosciences program (CFDA 47.050) will support research led by Rutgers, The State University to improve understanding of how continental shelf regions, shorelines, and coastlines have responded to changes in sea level, sediment supply, and tectonic processes over the Miocene epoch. The $462,435 award will fund the integration of sediment core data, high-resolution 3D seismic imaging, and forward stratigraphic modeling to test...
- This National Science Foundation Project Grant of $103,517 will support research reconstructing bottom water temperatures from bivalves on the continental shelf off the east coast of the United States from approximately 5,000 years ago to present. The award was made on August 1, 2022 to The University of Southern Mississippi under the Geosciences program (CFDA 47.050) to strengthen understanding of integrated Earth system processes. Researchers will analyze isotope ratios in living and fossil...
- This National Science Foundation Project Grant under the Geosciences program (CFDA 47.050) totaling $103,519 will support collaborative research by the Woods Hole Oceanographic Institution from August 2022 to July 2025 to reconstruct bottom water temperatures on the Middle Atlantic continental shelf over the past 5,000 years using living and fossil shells of Atlantic surfclams and ocean quahogs. The grant aims to develop spatial-temporal reconstructions of bottom water temperatures to further...
- This $696,926 National Science Foundation Project Grant under the Geosciences program (CFDA 47.050) funds collaborative research between the University of New Mexico, University of South Florida, and Harvard University to advance understanding of global mean sea level variations and the relative contributions of polar ice sheets and glaciers. The researchers will use geological records preserved in coastal cave deposits to reconstruct global mean sea level history over the past 130,000 years...
- 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,...
- This Project Grant award from the National Science Foundation's Geosciences program (CFDA 47.050) provides $144,969 to Iowa State University of Science and Technology to produce a continuous, annually resolved, and millennial-length marine climate history of the Northeast Pacific Ocean region. The project will utilize paleoclimate proxies from bivalve mollusks, tree-ring chronologies, and tropical coral growth-increment records to reconstruct sea surface temperatures and climate variability in...
- Summary: Indian Ocean Carbon Reservoir and Ice Age Ventilation Research The National Science Foundation (NSF) Division of Ocean Sciences awarded a Project Grant of $150,602 to the University of California, Irvine under the Geosciences program (CFDA 47.050) for collaborative research examining deep Indian Ocean carbon storage and ventilation patterns during the Last Glacial Maximum approximately 18,000 years ago. The award, effective October 1, 2025 through September 30, 2028, will produce...
- This $268,585 Project Grant award from the National Science Foundation (NSF) Division of Behavioral and Cognitive Sciences (CFDA 47.075) supports long-term research examining human-environment interactions along the Pacific Coast. The research team from the University of Nevada, Reno will conduct archaeological surveys and excavations, radiocarbon dating, and stable isotope analysis of marine shells and fish remains to develop a chronology of coastal occupation and paleoenvironmental change over...
- This $172,778 project grant from the National Science Foundation Division of Ocean Sciences, under the Geosciences program (CFDA 47.050), will fund research to test climate model predictions of hydrologic change in the tropical Atlantic during a past warm period. Specifically, the awardee, Utah State University, will geochemically analyze oxygen isotopes and magnesium-to-calcium ratios in planktonic foraminifera from deep-sea sediment cores at several sites, including Ocean Drilling Project Site...
COLLABORATIVE RESEARCH: DATING ANCIENT SHORELINES USING AMINO ACID GEOCHRONOLOGY TO RECONSTRUCT PAST HIGH SEA LEVELS -GLOBAL SEA LEVEL HAS FLUCTUATED THROUGHOUT EARTH HISTORY. TO UNDERSTAND SEA LEVEL CHANGES, IT IS IMPORTANT TO IDENTIFY AND DATE ANCIENT MARINE SHORELINES. THIS STUDY FOCUSES ON THE LAST INTERGLACIAL PERIOD ABOUT 125,000 YEARS AGO, WHEN GLOBAL SEA LEVELS WERE ROUGHLY 20 FEET HIGHER THAN TODAY. THE PROJECT IMPROVES A DATING METHOD BASED ON CHEMICAL CHANGES IN FOSSIL SHELLS AND APPLIES IT TO A RANGE OF GLOBAL SITES. A PUBLICLY ACCESSIBLE FRAMEWORK AND INTERACTIVE TOOLS WILL MAKE IT EASIER TO DETERMINE SHORELINE AGES IN OTHER REGIONS. THE PROJECT STRENGTHENS ACCESS TO SPECIALIZED RESEARCH FACILITIES AND TRAINS STUDENTS IN STEM FIELDS. IMPROVED SHORELINE DATING WILL SUPPORT BETTER MODELS OF ICE-SHEET STABILITY, COASTAL CHANGE, LAND UPLIFT, AND RELATED NATURAL HAZARDS. THIS RESEARCH WILL CALIBRATE AND STANDARDIZE AMINO ACID RACEMIZATION (AAR) GEOCHRONOLOGY FOR MARINE MOLLUSK SHELLS BY ANALYZING D/L RATIOS FROM APPROXIMATELY 100 GLOBALLY DISTRIBUTED, INDEPENDENTLY DATED LAST INTERGLACIAL SITES. THESE DATA WILL BE USED TO ESTABLISH TEMPERATURE-DEPENDENT ISOCHRONS, WITH A PRIMARY FOCUS ON MARINE ISOTOPE STAGE 5E (~125,000 YEARS OLD). A COMPLEMENTARY ISOCHRON FOR ~40,000 YEARS WILL BE DERIVED BY INTERPOLATING BETWEEN LAST INTERGLACIAL BENCHMARKS AND RADIOCARBON-DATED HOLOCENE SHELLS, PROVIDING A TOOL FOR IDENTIFYING SAMPLES BEYOND THE EFFECTIVE RANGE OF RADIOCARBON DATING. POST-DEPOSITIONAL TEMPERATURE HISTORIES WILL BE ESTIMATED USING EXISTING CLIMATE MODEL SIMULATIONS ON A ~200 KM GLOBAL GRID TO QUANTIFY SPATIAL VARIATION IN RACEMIZATION RATES. TAXONOMIC EFFECTS WILL BE EVALUATED THROUGH ANALYSES OF CO-OCCURRING TAXA SUBJECTED TO SIMILAR THERMAL HISTORIES. THE STUDY WILL EMPHASIZE MEASUREMENTS OF THE INTRA-CRYSTALLINE AMINO ACID FRACTION TO ENHANCE RELIABILITY AND REMOVE EFFECTS FROM CONTAMINATION. THE RESULTING EMPIRICAL D/L?TEMPERATURE RELATIONSHIPS WILL UNDERPIN AN INTERACTIVE WORLD MAP THAT PROVIDES PREDICTED VALUES AND UNCERTAINTIES, THEREBY DELIVERING A STANDARDIZED AND TRANSFERABLE FRAMEWORK FOR SHORELINE AAR GEOCHRONOLOGY WORLDWIDE. THIS AWARD REFLECTS NSF'S STATUTORY MISSION AND HAS BEEN DEEMED WORTHY OF SUPPORT THROUGH EVALUATION USING THE FOUNDATION'S INTELLECTUAL MERIT AND BROADER IMPACTS REVIEW CRITERIA.- SUBAWARDS ARE NOT PLANNED FOR THIS AWARD.
Mod # | Description | ReasonForModification | Federal Obligation | Date |
|---|---|---|---|---|
| Not listed | $48.5k | 4/13/26 |