Dr. Jiuyuan Wang
Agouron Postdoctoral Fellow
Jiuyuan Wang is an isotope geochemist. He is broadly interested in sedimentary geochemistry and geobiology, with particular focus on the co-evolution of life and environment, climate and its feedbacks on seawater chemistry, as well as the fundamental behaviors of isotope systems. He is working on the MRV of the enhanced weathering technique in the group.
Dr. Mojtaba Fakhree
1) Interaction between life and Earth’s surface processes
2) Global carbon cycle
3) Carbon capture
Dr. Ella Holme
- Experimental geochemistry
- Kinetics of enhanced mineral weathering reactions
- Physical and chemical evolution of rock during enhanced weathering
- Theoretical and experimental limits of carbon capture in natural waters
I am broadly interested in the coevolution of life, climate, and chemical cycles across Earth history, and how the geochemical composition of sedimentary rocks captures these dynamics. Current projects include reconstruction changes in ocean pH across ancient global warming events with boron isotopes, as well as changes in chemical weathering on land with lithium isotopes.
My work focuses mostly on carbon dioxide removal through enhanced rock weathering (ERW). I use trace metal analysis and other geochemical tools to track mineral weathering rates in laboratory and field experiments, and look at how this impacts ERW as a viable negative emissions technology. More broadly, I’m interested in examining questions about the interplay of the carbon cycle, oxygenation and climate change through Earth history.
As an astrobiologist, I am interested in the co-evolution of life on Earth and Earth’s atmosphere, particularly in the Precambrian. For the past 3 years, I have been developing a new isotopic photochemical model, a new conceptual paradign and a new proxy for the triple oxygen isotope system, the best system we have to track the Precambrian pO2 and pCO2 due to its mass independent nature. I am currently also working on publishing our major discovery onto a mechanism of Nature that could shape the evolution of surface life for more than 3 billion years.
1) Mitigating nitrous oxide emissions with enhanced mineral weathering
2) Methods development and application of triple oxygen isotope measurements in phosphate minerals
Ayesha A. Ahmed
Enhanced mineral weathering (wollastonite) in agricultural and forest ecosystems.
I am interested in studying carbon capture technologies and verification focusing on ocean-based solutions. I am currently working on mesocosm bioturbation experiments in environmental control chambers and running instruments to characterize silicate feedstock weathering.
Undergraduate research assistant
Benj just joined the group in January 2023 and is super excited to be helping out! He is supporting the wastewater treatment plant carbon capture project by helping to characterize particle size distributions in the powdered-up rocks that will be dissolved in the wastewater.