Robert Graham

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Robert Graham

DPhil student in AOPP

Ahoyhoy, my name is R.J. Graham. I'm a DPhil student in AOPP working in Ray Pierrehumbert's group. Currently I'm researching the details of the silicate weathering feedback on rocky planets. I'm supported by a Clarendon Scholarship.

Currently I'm working on modeling the impact of the silicate weathering feedback on the climate behavior of wet, rocky exoplanets in the "liquid water habitable zones" of their stars. I have developed 0-D, 2-D, and 3-D models to explore the impacts of the silicate weathering feedback, and I plan to couple a weathering model to output from a general circulation model in the near future. I have also used GCM simulations to explore the dynamics of terrestrial planetary atmospheres during snowball events. The unifying theme behind my research so far is a desire to understand the processes that initiate, maintain, threaten, and end habitability for wet, rocky worlds like Earth.


Graham, R. J., T. A. Shaw and D. S. Abbot, 2019: The snowball stratosphere, J. Geophys. Res., 10.1029/2019JD031361.

Abbot, D.S., J. Bloch-Johnson, J. Checlair, N. X. Farahat, R. J. Graham, D. Plotkin, P. Popovic, and F. Spaulding-Astudillo, 2018: Decrease in Hysteresis of Planetary Climate for Planets with Long Solar Days, Astrophysical Journal, 10.3847/1538-4357/AAA70F.


Shaw, T. A. and R. J. Graham, 2019: Moist static energy solves storm track intensity puzzle for Snowball Earth, submitted.

In Preparation

Graham, R. J. and R. T. Pierrehumbert, 2020: Energetic and thermodynamic limits on continental silicate weathering strongly impact the habitability of wet, rocky worlds, in prep.