Zhiming Kuang

(Harvard University)

Some applications of linear response functions in atmospheric dynamics.

What Meteo Colloquium Homepage UG Graduate
When Nov 28, 2018
from 03:30 pm to 04:30 pm
Where John Cahir Auditorium 112 Walker Building
Contact Name Sukyoung Lee
Contact email
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Zhiming Kuang Harvard

For a number of problems in climate dynamics, it is useful to describe the system with a set of macroscopic state variables and consider statistics of the other variables, which may represent highly nonlinear processes, as smooth functions of the macroscopic variables. The utility of a linear approximation to these functions, namely the linear response functions, is illustrated with two examples in atmospheric dynamics. The first is the stability of a moist convecting atmosphere, where the linear response functions are used to elucidate the dynamics of convectively coupled tropical waves and convective self-aggregation. The second example is the dynamics of the annular mode, where the linear response functions are used to quantify the strength of the eddy-mean-flow feedback.