Changes in carbon dioxide concentration and/or ocean circulation are generally invoked to explain both equable early Miocene climates and subsequent rapid East Antarctic ice sheet (EAIS) expansion in the middle Miocene. However, pCO\sb2 trends and absolute magnitudes must be inf…
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The Indo-Pacific Warm Pool is currently the warmest region of the modern ocean, with annual average sea surface temperatures upwards of 28°C. As such, it is the largest single source of heat and moisture to the atmosphere. Climate modeling efforts and paleoceanographic reconstru…
This dissertation is a collection of five calcareous nannofossil and one stable isotope studies on materials from Ocean Drilling Program (ODP) Legs 183 (Site 1135), 206 (Site 1256), and 207 (Site 1259) that target two important paleoceanographic events: (1) the middle/late Mioce…
The work presented in this dissertation focuses on the paleoceanography of the Indonesian Seas over the past 25,000 years; a region that plays a critical role in the global atmospheric and oceanic circulation. The modern oceanography of the Indonesian Seas is very complex due to…
This dissertation aims to reconstruct the volcanic, geologic, and oceanographic evolution in the Andaman Sea and northern Bay of Bengal regions during the last ~9.4 Myrs. The volcanic evolution of the north Sunda Subduction Zone is investigated through geochemical (i.e., major, …
Geochemical data and outcrop observations are used to reconstruct palaeoceanographic conditions in western Panthalassa across the transition from the Permian to the Early Triassic. Major, minor and trace element data were measured from the Lower and Middle Permian Johnson Canyon…
Nitrate is the most common limiting nutrient in the ocean and plays a critical role in the extent and intensity of marine primary production, and therefore the global ocean’s biological pump. Characterization of the supply and demand of nitrate constrains how ocean biology may r…