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A Fluvial Perspective on the Role of Sulfide Oxidation in the Global Carbon Cycle


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.


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.))
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
Research Advisor(s):
  • Adkins, Jess F.
Thesis Committee:
  • Fischer, Woodward W. (chair)
  • Adkins, Jess F.
  • Eiler, John M.
  • West, A. Joshua
Defense Date:10 May 2022
Non-Caltech Author Email:preston.kemeny (AT)
Funding AgencyGrant Number
Fannie and John Hertz FoundationCohan/Jacobs and Stein Families Fellowship
National Defense Science and Engineering Graduate Fellowship32 CFR 168a
Record Number:CaltechTHESIS:05272022-003433646
Persistent URL:
Related URLs:
URLURL TypeDescription
http://ElementalCycles.orgAuthorPersonal website adapted for Chapter 2 adapted for Chapter 3 adapted for Chapter 4
Kemeny, Preston Cosslett0000-0003-1693-4142
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14633
Deposited By: Preston Kemeny
Deposited On:27 May 2022 23:27
Last Modified:27 May 2022 23:27

Thesis Files

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