What are the roles of carbon and ocean circulation in triggering the Mid-Pleistocene Climate Transition?
Using new instrument techniques and laboratory-produced materials, I seek to improve both the theoretical understanding of the boron isotope pH proxy, and the analytical capability to measure boron isotopes in carbonates.
Nuclear weapons testing in the 20th century doubled the amount of radiocarbon in the atmosphere. The fate of this bomb-produced radiocarbon helps inform how the ocean has absorbed carbon produced by human activities.
Earth has descended into major cyclic ice ages over the last 3 million years. How did this happen?