Citation
Kemeny, Preston Cosslett (2022) A Fluvial Perspective on the Role of Sulfide Oxidation in the Global Carbon Cycle. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/59hb-zp37. https://resolver.caltech.edu/CaltechTHESIS:05272022-003433646
Abstract
This thesis contains an introduction and five studies on the role of sulfide oxidation in regulating the relationship between chemical weathering and climate. Chapter I provides an overview of the key question — what stabilizes the global carbon cycle? — and motivates the specific questions addressed in each subsequent chapter. Chapter II describes a new numerical tool for inverting observations of dissolved river chemistry for information about chemical weathering reactions. Chapters III, IV, and V describe observations from field sites in Iceland, Nepal, and Alaska that address the fidelity of fluvial sulfur isotope ratios, the role of sulfide oxidation in Cenozoic cooling, and sulfur dynamics within permafrost landscapes, respectively. Using the tools and lessons of the preceding chapters, Chapter VI quantifies the impact of global chemical weathering on the concentration of atmospheric carbon dioxide.
Item Type: | Thesis (Dissertation (Ph.D.)) | |||||||||||||||
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Subject Keywords: | chemical weathering, river inversion, sulfide oxidation, isotope geochemistry, sulfate sulfur isotope ratios, global sulfur cycle, biogeochemical cycles, earth surface processes | |||||||||||||||
Degree Grantor: | California Institute of Technology | |||||||||||||||
Division: | Geological and Planetary Sciences | |||||||||||||||
Major Option: | Geochemistry | |||||||||||||||
Thesis Availability: | Restricted to Caltech community only | |||||||||||||||
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Defense Date: | 10 May 2022 | |||||||||||||||
Non-Caltech Author Email: | preston.kemeny (AT) gmail.com | |||||||||||||||
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Record Number: | CaltechTHESIS:05272022-003433646 | |||||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechTHESIS:05272022-003433646 | |||||||||||||||
DOI: | 10.7907/59hb-zp37 | |||||||||||||||
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Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||||||||
ID Code: | 14633 | |||||||||||||||
Collection: | CaltechTHESIS | |||||||||||||||
Deposited By: | Preston Kemeny | |||||||||||||||
Deposited On: | 27 May 2022 23:27 | |||||||||||||||
Last Modified: | 08 May 2024 17:31 |
Thesis Files
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