The dynamics of the troposphere can be separated (at least outside the tropics) into the problem of understanding the zonally-symmetric circulation and the problem of understanding the zonally-asymmetric circulation. Since coming to Princeton I have worked on both problems, using idealized models like the Phillips 2-layer QG model and the GFDL dry dynamical core, with the unifying theme being connecting the low-frequency variability of these systems to their linear responses.
I am also interested in climate science more generally, including things like the problem of climate sensitivity, climate model development and evaluation, ocean heat uptake and climate variations on all time-scales. In a recent project I have tried to relate the internal variability of CMIP5 models to their sensitivity.
What I'm working on
- Lutsko, N. J., Held, I. M., Zurita-Gotor, P., and O'Rourke, A. K. Lower Tropospheric Eddy Momentum Fluxes in Idealized Models and Reanalysis Data.
- Lutsko, N. J., Held, I. M., and Takahashi, K. What can the internal variability of CMIP5 models tell us about their sensitivity?
- Lutsko, N. J. The Response of a Dry Atmosphere to ENSO-like Heating: Superrotation and the Breakdown of Linear Theory.
- Lutsko, N. J., Held, I. M., and Zurita-Gotor, P. (2015). Applying the Fluctuation–Dissipation Theorem to a Two-Layer Model of Quasi-Geostrophic Turbulence. Journal
of the Atmospheric Sciences, 72(8):3161 – 3177. Link
- Lutsko, N. J. and Held, I. M. (2016). The Response of an Idealized Atmosphere to Orographic Forcing: Zonal vs Meridional Propagation.Journal
of the Atmospheric Sciences, 73(9):3701 – 3718. Link