Earth System Physics Seminar

[Pandora Malchose Pieri]

EARTH SYSTEM PHYSICS SEMINAR

Tuesday, 18 July
11:00 hrs, MB SEMINAR ROOM

Ben SANDERSON
University of Oxford
U.K.

"EVALUATING AND CONSTRAINING FEEDBACK MECHANISMS IN A PERTURBED PHYSICS 
ENSEMBLE"

Abstract:
We apply a linear analysis to a grand ensemble of perturbed climate 
models in order to determine independent feedback mechanisms.  By 
evaluating the climatic response in each Giorgi region, we build up a 
fingerprint of the global response to increasing greenhouse gas 
forcing.  Principle Component Analysis is then used to relate 
independent mechanisms to the perturbed parameters in the ensemble, and 
to constrain the strength of each mechanism using reanalysis data.  An 
estimate of climate sensitivity can then be derived by examining how 
the feedbacks project onto the global mean climate response.