I am a postdoctoral researcher at the University of Reading, working with Jonathan Gregory. I study the sensitivity of the Earth's climate to changes in the composition of the atmosphere, and how that sensitivity, and our estimates of it, can evolve over time. I use a range of approaches, including building simple mathematical models, running computer simulations that try to capture the full complexity of the Earth system, and analyzing observations of the Earth's recent past, as well as proxies of the climate of the distant past. I am co-organizer, with Maria Rugenstein, of LongRunMIP, which is an archive of millenial-scale runs of coupled general circulation models. I also organized the first Rossbypalooza, a workshop bringing together climate scientists and statisticians for a week-long hackathon and lecture series.
Bloch-Johnson, J., D.S. Abbot, and M. Rugenstein. Spatial radiative feedbacks from internal variability using multiple regression (submitted)
Bloch-Johnson, J., D.S. Abbot, T. Cronin, and E. Tziperman. Nonlinear equilibrium climate sensitivity in a perturbed physics ensemble (in prep)
Callahan, C. W., C. Chen, M. Rugenstein, J. Bloch-Johnson, S. Yang, M. L. Stein, and E. J. Moyer. Robust long-term decrease in ENSO amplitude under
elevated CO2 (submitted)
Rugenstein, M., J. Bloch-Johnson, J. Gregory, T. Andrews, T. Mauritsen, C. Li, T. L. Frölicher, D. Paynter, G. Danabasoglu, S. Yang, J.-L. Dufresne, L. Cao, G. A. Schmidt, A. Abe-Ouchi, O. Geoffroy, and R. Knutti (2019). Equilibrium climate sensitivity estimated by equilibrating climate models, Geophysical Research Letters.
Abbot, D.S., J. Bloch-Johnson, J. Checlair, N. 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, The Astrophysical Journal