{"id":"https://openalex.org/G107635658","display_name":"Tree-Ring Isotopic Composition as a Proxy for Isotopic      Composition of Paleoprecipitation and Paleoclimate in the   American Southwest","description":"Abstract  ATM-9421041  Leavitt, Steven  University of Arizona  Title:  Tree-Ring Isotopic Composition as a Proxy for Isotopic  Composition of Paleoprecipitation and Paleoclimate in the American  Southwest    This study is intended to define relationships between isotopic  composition (delD, del18O, del13C) measured in tree-rings with  instrumental climate data and actual isotopic measurements of  precipitation.  Stable-isotopic measurements will be made on  cellulose of ponderosa pine from southeastern Arizona and southern  New Mexico.  The delD and del18O of the trees will be calibrated  with respect to a long record (>12 years) of isotopic composition  of precipitation from nearby Tucson, extended with other  precipitation isotopic data from the IAEA network.  In the long  term, the connection between the tree-ring measurements and  climate/source-water variables established in this study can be  used to explore periods preceding the instrumental period to  determine the spatial and temporal variability and strength of  precipitation sources.","funder_award_id":"9421041","funder":{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","doi":"10.13039/100000001"},"funded_outputs":["https://openalex.org/W2022740419","https://openalex.org/W4295793225"],"funded_outputs_count":2,"parent_awards":[],"sub_awards":[],"sub_awards_count":0,"amount":158860.0,"currency":"USD","amount_usd":158860.0,"amount_usd_basis":"usd_native","recipients":[],"recipient_countries":[],"recipient_regions":[],"research_scope":{"is_research":true,"basis":"funder_default","tier":1},"funding_type":"grant","funder_scheme":"Continuing Grant","start_date":"1995-02-01","end_date":"1998-10-31","start_year":1995,"end_year":1998,"landing_page_url":"https://www.nsf.gov/awardsearch/showAward?AWD_ID=9421041","doi":null,"provenance":"nsf_award_search","lead_investigator":{"given_name":"Steven","family_name":"Leavitt","orcid":null,"role_start":null,"affiliation":{"name":"University of Arizona","country":"","ids":null}},"co_lead_investigator":null,"investigators":null,"works_api_url":"https://api.openalex.org/works?filter=awards.id:G107635658","primary_topic":{"id":"https://openalex.org/T11594","display_name":"Tree-ring climate responses","score":0.9248,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11594","display_name":"Tree-ring climate responses","score":0.9248,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"institution_awarded":[{"id":"https://openalex.org/I138006243","display_name":"University of Arizona","ror":"https://ror.org/03m2x1q45","country_code":"US","type":"education","lineage":["https://openalex.org/I138006243"]}],"updated_date":"2026-10-16T03:01:01.000Z","created_date":"2026-07-13T04:41:43.000Z"}