| NSF Org: |
AGS Division of Atmospheric and Geospace Sciences |
| Recipient: |
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| Initial Amendment Date: | February 1, 2024 |
| Latest Amendment Date: | February 1, 2024 |
| Award Number: | 2303526 |
| Award Instrument: | Standard Grant |
| Program Manager: |
Mea S. Cook
mcook@nsf.gov (703)292-7306 AGS Division of Atmospheric and Geospace Sciences GEO Directorate for Geosciences |
| Start Date: | February 1, 2024 |
| End Date: | January 31, 2027 (Estimated) |
| Total Intended Award Amount: | $29,999.00 |
| Total Awarded Amount to Date: | $29,999.00 |
| Funds Obligated to Date: |
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| History of Investigator: |
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| Recipient Sponsored Research Office: |
2199 S UNIVERSITY BLVD RM 222 DENVER CO US 80210-4711 (303)871-2000 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
2199 S UNIVERSITY BLVD DENVER CO US 80210-4711 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): | P4CLIMATE |
| Primary Program Source: |
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| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.050 |
ABSTRACT
This project specifically seeks to use stable oxygen isotopes (?18O) measured in cellulose from the annual growth rings of trees located in Guatemala, Honduras, Ecuador, Peru, Bolivia and Chile to reconstruct wet season precipitation variability for at least the last 200 years across the neotropics to glean insights on large-scale tropical climate dynamics.
The general goal of the research is to understand recent and potential future changes in the position and width of the Intertropical Convergence Zone (ITCZ) and how these changes may be tied to global modes of climate variability and could affect patterns of tropical rainfall in both the northern (NH) and southern (SH) hemispheres.
The rational for the research strategy of using isotopes from tree cellulose is that the relative paucity of tree-ring records in tropical regions (a large geographic area and extensive ecosystem) prevents a more comprehensive understanding of the range of climate variability particularly at decadal to centennial time scales and in response to changes in radiative forcing. Such data are otherwise unavailable from modern observations, pilot studies, and paleoclimate data elsewhere in the world.
The potential Broader Impacts include support for a postdoctoral researcher as well as graduate undergraduate students involved in the research and extensive interaction with international researchers.
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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