Human emissions of greenhouse gases and aerosols alter both the global mean and spatial pattern of surface temperatures -- both in the annual mean and throughout the seasonal cycle. Whereas greenhouse gases induce mean warming that tends to be polar amplified, aerosols cool the globe and, being emitted primarily in the northern hemisphere mid-latitudes, cool the northern hemisphere relative to the south. How will atmospheric circulation patterns -- and with them the precipitation patterns that society and ecosystems depend on -- respond to these changes? This question drives my research. Currently, our best attempts at its answer are rife with uncertainty, impeding attempts to adapt to a changing climate.
My approach to climate modeling research is strongly influenced by the work of Isaac Held and others on climate model hierarchies and using models to improve understanding; see Bony et al. 2011 and Held 2005. My advisor is Yi Ming, and my PhD committee includes Isaac Held and Leo Donner.
A PDF of my CV is available on my homepage.
1. Hill, S. A. and Y. Ming. “Nonlinear climate response to regional brightening of tropical marine stratocumulus.” Geophysical Research Letters. Vol. 39, L15707, 5 pp., 2012,
doi:10.1029/2012GL052064 (PDF and supplemental figure)
1. Hill, S. A., Y. Ming, and I. M. Held. “Mechanisms of forced tropical meridional energy flux change.” Submitted to Journal of Climate. (manuscript PDF; AGU slides PDF; AGU talk video accessible via "Videos on demand" link to right after creating an account.)