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RECONSTRUCTING THE CLIMATE VARIATION OF EASTERN PERU OVER THE
LAST MILLENNIUM
by
Justin Michael Reuter
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(EARTH SCIENCES)
December 2008
Copyright 2008 Justin Michael Reuter
Object Description
| Title | Reconstructing the climate variation of eastern Peru over the last millennium |
| Author | Reuter, Justin Michael |
| Author email | reuter@usc.edu; jmreuter3@aol.com |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Geological Sciences |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2008-09-11 |
| Date submitted | 2008 |
| Restricted until | Unrestricted |
| Date published | 2008-10-28 |
| Advisor (committee chair) | Stott, Lowell |
| Advisor (committee member) |
Berelson, William Hammond, Douglas |
| Abstract | The δ^18 O of two speleothems from northeastern Peru provides a 1000 year history of precipitation variability at subannual to decadal resolution. The speleothem δ^18 O varies in response to shifting North Atlantic SSTs that bring about a southward or northward bias in the Intertropical Convergence Zone. A southward bias in the ITCZ leads to increased precipitation over eastern Peru. Wetter periods cause lower speleothem δ^18 O due to the 'amount effect'. The 1000 year speleothem reconstruction documents a multicentury increase in the amount of precipitation during the "Little Ice Age". There has been a progressive decrease in precipitation over the past two centuries. These observations do not agree with earlier reconstructions of rainfall variability that relied upon river runoff proxies from northern South America. It is proposed that this discrepancy is a result of decreased river runoff in wetter periods because precipitation is stored at higher elevations as ice. |
| Keyword | paleoclimate; peru; ITCZ; little ice age; glacier; cariaco basin; precipitation; speleothem; d18O; stable isotopes; geology; earth science |
| Geographic subject (country) | Peru |
| Coverage date | 1000/2000 |
| 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 |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m1703 |
| Contributing entity | University of Southern California |
| Rights | Reuter, Justin Michael |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Reuter-2428 |
| Archival file | uscthesesreloadpub_Volume40/etd-Reuter-2428.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Full text | RECONSTRUCTING THE CLIMATE VARIATION OF EASTERN PERU OVER THE LAST MILLENNIUM by Justin Michael Reuter A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (EARTH SCIENCES) December 2008 Copyright 2008 Justin Michael Reuter |
