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EVALUATION OF THE MECHANISM OF VARIABILITY OF THE δ 18 O IN αCELLULOSE
OF TROPICAL DECIDUOUS TREE PINUS KESIYA:
CONVENTIONAL MODELS AND NEW THINKING
by
Andrés C. Martinez
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements of the Degree
MASTER OF SCIENCE
(EARTH SCIENCE)
December 2007
Copyright 2007 Andres C. Martinez
Object Description
| Title | Evaluation of the mechanism of variability of the delta18O in alpha-cellulose of tropical deciduous tree pinus kesiya: conventional models and new thinking |
| Author | Martinez, Andrés C. |
| Author email | andrescm@usc.edu |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Geological Sciences |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2007-08-01 |
| Date submitted | 2007 |
| Restricted until | Unrestricted |
| Date published | 2007-10-22 |
| Advisor (committee chair) | Stott, Lowell D. |
| Advisor (committee member) |
Hammond, Douglas E. Bottjer, David J. |
| Abstract | The relationship between environmental variables and the oxygen isotope composition of alpha-cellulose in ringed tropical trees may not be constrained to simple "amount effects." Here I present a 55-year continuous record of delta18O of alpha-cellulose from Pinus kesiya. By comparing the cellulose isotope record to previous data, model theory, and rain amount data it is clear that both amount effects as well as isotopic changes in atmospheric circulation regimes are incorporated in the oxygen isotopic ratio of the alpha cellulose. Regression analysis show most of the variability recorded in the delta18O of cellulose results from changes in total annual rainfall, and large anomalies arise during La Nina and El Nino events. A proxy rainfall reconstruction exhibits poor correlation with rainfall variability and will require further work in order to constrain how best to extract a quantitative estimate of rainfall. |
| Keyword | stable isotope; dendroclimatology; climatology; Asian monsson; Thailand |
| Geographic subject (country) | Thailand |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m874 |
| Contributing entity | University of Southern California |
| Rights | Martinez, Andrés C. |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Martinez-20071022 |
| Archival file | uscthesesreloadpub_Volume40/etd-Martinez-20071022.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | EVALUATION OF THE MECHANISM OF VARIABILITY OF THE δ 18 O IN αCELLULOSE OF TROPICAL DECIDUOUS TREE PINUS KESIYA: CONVENTIONAL MODELS AND NEW THINKING by Andrés C. Martinez A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements of the Degree MASTER OF SCIENCE (EARTH SCIENCE) December 2007 Copyright 2007 Andres C. Martinez |
