Thomas Toniazzo, Norce Klima, Bjerknes Centre for Climate Research, University of Bergen, Norway


The interdependence between climate change and atmospheric circulation regimes


Theory indicates that a warming climate must be accompanied by
systematic changes in the global circulation, with implications for the
distribution of precipitation. However, while the tropical response is qualitatively
fairly robust, there are uncertainties associated with the mid-latitude
and polar responses. Idealised numerical experiments show the important
role of polar-cap temperatures and energy budgets. The associated
circulation responses are seen to have significant implications for the
sub-tropical climate in particular, with associated coupled cloud
responses. These are a source of considerable uncertainties in relation
to global warming and climate sensitivity. Some results suggest that the
presence of such global circulation feedbacks may leave a signature in
the internal variability of the climate.


Thursday February 7, 13:15-14.00


Rossbysalen C609, Arrhenius laboratory, Svante Arrhenius väg 16C, 6th floor