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Research Spending & Results

Award Detail

Awardee:UNIVERSITY OF MAINE SYSTEM
Doing Business As Name:University of Maine
PD/PI:
  • Karl J Kreutz
  • (207) 581-3011
  • karl.kreutz@maine.edu
Award Date:11/17/2017
Estimated Total Award Amount: $ 95,794
Funds Obligated to Date: $ 95,794
  • FY 2018=$95,794
Start Date:04/01/2018
End Date:03/31/2019
Transaction Type:Grant
Agency:NSF
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.050
Primary Program Source:040100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:EAGER: Exploration of the Denali Basal Ice Core Archive
Federal Award ID Number:1806422
DUNS ID:186875787
Parent DUNS ID:071750426
Program:PALEOCLIMATE PROGRAM
Program Officer:
  • David J. Verardo
  • (703) 292-8527
  • dverardo@nsf.gov

Awardee Location

Street:5717 Corbett Hall
City:ORONO
State:ME
ZIP:04469-5717
County:Orono
Country:US
Awardee Cong. District:02

Primary Place of Performance

Organization Name:University of Maine
Street:
City:Orono
State:ME
ZIP:04469-5760
County:Orono
Country:US
Cong. District:02

Abstract at Time of Award

This award uses funds, under the auspices of the EArly Concept Grant For Exploratory Research (EAGER) program, to explore the use of the basal ice from the Mt. Hunter (Denali National Park) ice core for reconstructing hydroclimate variability in Central Alaska through the Holocene. The approach employed in this EAGER project will test the viability of dating constraints in the bottom ten meters of the core and explore new approaches for paleoclimate proxy measurement. The researchers aim to address the following questions: 1) Are there conformable strata within the basal ice of Mt. Hunter? The researchers will explore the feasibility of using novel high resolution (laser ablation ICP-MS, micro-stable isotope analyses) and 14-Carbon measurements to test the stratigraphic continuity hypothesis. If the measurement techniques provide chronological information with appropriate errors and the Denali ice core archive proves to have a continuous stratigraphic record, then a large portion of the Holocene may be accessible in the archive. 2) What is the history of summer temperature in Central Alaska through the Holocene? The researchers will test a new approach to analyze compressed melt features using Scanning Electron Microscopy (SEM) that has the potential to significantly expand our knowledge of past summer temperature variability. 3) How long has ice been present on the Mt. Hunter plateau? Access to bed material contained in the lowest portion of the Mt. Hunter ice cores provides an opportunity for investigation of this question in Central Alaska. The researchers will test the validity of cosmogenic isotope analysis (10-Berillium) on small pebbles and sediment contained in the basal core sections. Such analyses are unique on lithogenic material recovered in an alpine ice core. If successful, cosmogenic isotope analysis of samples from basal ice will open new research avenues for combining glaciological, paleoclimate, glacial geology, and subglacial environment disciplines. Exploration of new measurements in the Denali ice core archive will potentially provide scientific breakthroughs on several important paleoclimate fronts such as: 1) improvement and extension of existing ice core accumulation time series, and evaluation of hydroclimate variability over the Holocene; 2) evaluation of the impact of various modes of climate variability, particularly El Nino-Southern Oscillation (ENSO), on regional climate in the North Pacific over the Holocene; 3) understanding regional differences in the hydrological cycle particularly given the potential societal impacts of ENSO-related variability on North Pacific hydrology; 4) evaluation of regional hydroclimate variability and glacier response during a documented warm period (Holocene climate optimum); and 5) reconnaissance effort with cosmogenic isotope analyses may yield valuable initial information on ice stability in Central Alaska over much longer time periods. This as an important step towards designing and implementing a comprehensive research strategy addressing long-term (e.g., Plio-Pleistocene) ice dynamics in Alaska. Such results would have a broad impact across the geosciences.

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