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Examining Late Twentieth Century Trends in the Central Tropical Pacific

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Title:Examining Late Twentieth Century Trends in the Central Tropical Pacific
Authors:Conroy, Ted
Contributors:Powell, Brian (advisor)
Oceanography (department)
Global Environmental Science (department)
Keywords:ENSO
oxygen isotope
Date Issued:2015
Publisher:University of Hawaiʻi at Mānoa
Place of Publication:Honolulu
Abstract:Examining Late Twentieth Century Trends in the Central Tropical Pacific. Ted
Conroy, May 2015. University of Hawaii at Manoa. Coral Proxy records are key
to understanding the El Niño Southern Oscillation (ENSO) prior to the
observational era. This study investigates how coral proxy records have
captured changes over the late twentieth century, the most observational rich
time period in history. An isotope enabled regional ocean modeling system
(isoROMS) was used for this study, and allows for oxygen isotopic ratios (δ18O)
to be calculated and directly compared to corals. Results show that Sr/Ca ratios
record sea surface temperature trends well; however, a nonlinear relationship
between sea surface salinity and seawater δ18O complicates paleo-salinity
measurements. Also, late twentieth century warming and freshening trends in
the central tropical Pacific appear to be strongly influenced by decadal changes
that must be identified to understand long term anthropogenic effects.
Pages/Duration:47 pages
URI:http://hdl.handle.net/10125/67738
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Rights Holder:Conroy, Ted
Appears in Collections: Global Environmental Science Theses


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