Barrett

Barrett, The Honors College at Arizona State University proudly showcases the work of undergraduate honors students by sharing this collection exclusively with the ASU community.

Barrett accepts high performing, academically engaged undergraduate students and works with them in collaboration with all of the other academic units at Arizona State University. All Barrett students complete a thesis or creative project which is an opportunity to explore an intellectual interest and produce an original piece of scholarly research. The thesis or creative project is supervised and defended in front of a faculty committee. Students are able to engage with professors who are nationally recognized in their fields and committed to working with honors students. Completing a Barrett thesis or creative project is an opportunity for undergraduate honors students to contribute to the ASU academic community in a meaningful way.

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Speleothem Carbon and Oxygen Isotopic Analysis in Southern South Africa

Description
Holocene climate dynamics for southern South Africa are still poorly understood, with only a few high-resolution isotopic studies and often contradicting records due to complex regional climates. South Africa's southern coastal margin represents an important transition zone for seasonal rainfall that reflects both regional and local climate systems. To gain…

Holocene climate dynamics for southern South Africa are still poorly understood, with only a few high-resolution isotopic studies and often contradicting records due to complex regional climates. South Africa's southern coastal margin represents an important transition zone for seasonal rainfall that reflects both regional and local climate systems. To gain insight into this unique environment, an isotopic record from Glentana Cave, with 176 measurements spanning 8 ka to 0.4 ka, is presented. δ18O and δ13C signals demonstrate abrupt changes to rainfall and vegetation, and support recent studies of a highly variable southern cape during the Holocene. Specifically, a quickly expanding summer rainfall zone (SRZ) between 6.8-6.3 ka, and 2.7 ka interrupt the generally year-round-rainfall environment. During times of greater summer rainfall the environment is characterized by more C4 vegetation. When compared to other South African coeval datasets, environmental changes appear to contrast northern more than southern records.
ContributorsWhitmore, Ben (Author) / Marean, Curtis (Thesis director) / Braun, Kerstin (Committee member) / Department of Economics (Contributor) / School of Mathematical and Statistical Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05