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Research Spending & Results

Award Detail

Awardee:UNIVERSITY OF ARKANSAS SYSTEM
Doing Business As Name:University of Arkansas
PD/PI:
  • David W Stahle
  • (479) 575-3703
  • dstahle@uark.edu
Co-PD(s)/co-PI(s):
  • Song Feng
Award Date:06/28/2020
Estimated Total Award Amount: $ 399,747
Funds Obligated to Date: $ 399,747
  • FY 2020=$399,747
Start Date:07/01/2020
End Date:06/30/2023
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:P2C2: Pan-American Precipitation Extremes and Multi-Decadal Regimes Reconstructed with Tree Ring Chronologies from the Amazon
Federal Award ID Number:2002374
DUNS ID:191429745
Parent DUNS ID:055600001
Program:Paleoclimate
Program Officer:
  • David Verardo
  • (703) 292-4695
  • dverardo@nsf.gov

Awardee Location

Street:1125 W. Maple Street
City:Fayetteville
State:AR
ZIP:72701-3124
County:Fayetteville
Country:US
Awardee Cong. District:03

Primary Place of Performance

Organization Name:University of Arkansas
Street:Ozark Hall 216
City:Fayetteville
State:AR
ZIP:72701-1201
County:Fayetteville
Country:US
Cong. District:03

Abstract at Time of Award

This project aims to develop new tree-ring chronologies in the Amazon to reconstruct precipitation, document coherence in tropical and extratropical precipitation extremes across the Americas, and examine multi-decadal variability of Amazon rainfall in observations, reconstructions, and model simulations. The rationale behind the research is that climate model simulations of hydroclimatic variability in the Amazon indicate that anthropogenic forcing may amplify the hydrologic cycle, resulting in more severe drought, extreme floods, and a decline in annual precipitation over most of the watershed. However, instrumental observations are limited before 1950 and may not represent the full range of inter-annual to multi-decadal rainfall variability over the Amazon. High-resolution climate proxies are rare in the Amazon, but tree-ring chronologies have been widely used to reconstruct past megadroughts and pluvials in mid-latitude North and South America. These dendroclimatic reconstructions have proven valuable for testing model simulations of the climate dynamics responsible for decadal moisture regimes The potential Broader Impacts include furthering the understanding of Amazonian hydroclimate to the broader scientific community and public. The data generated by this project will be used far beyond the specific aims of the research. The capacity building with South American researchers is a strong aspect of the project as is website development and video production. 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.

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