Speaker
Kimberlee Dube
(University of Saskatchewan)
Description
Rising greenhouse gas emissions are changing the circulation in the stratosphere and subsequently altering the stratospheric composition. The result is that trace gas trends from the past two decades show a hemispheric asymmetry, with trends in each hemisphere having opposite signs. Here we discuss trends in observations from the limb instruments ACE-FTS and OSIRIS, as well as trends in model results from WACCM. N2O observations from ACE-FTS and simulations from WACCM are used as a proxy for stratospheric circulation in order to isolate the effects of chemistry on trends in O3, HCl, and NOy.
Primary authors
Kimberlee Dube
(University of Saskatchewan)
Susann Tegtmeier
(GEOMAR Helmholtz Centre for Ocean Research Kiel)
Adam Bourassa
(University of Saskatchewan)
Daniel Zawada
(University of Saskatchewan)
Doug Degenstein
(University of Saskatchewa)
patrick sheese
Kaley Walker
(University of Toronto)
William Randel
(NCAR)
