Long-lived tracer patterns in the summer polar stratosphere

Details Long-lived tracer patterns in the summer polar stratosphere Long-lived tracer patterns in the summer polar stratosphere

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3855o&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 20, p. 3855-3858

Physics

21

Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics

Scientific paper

A three-dimensional off-line simulation of the transport of the long-lived source gas N2O in the summer stratosphere has been made with a global model. We found long-lived westward-propagating patterns resulting from the slow advection of coarsely-mixed structures of ex-vortex air and midlatitude air. The mixing of the air masses with these two different characteristics is a slow process that lasts from spring until late summer. In the regime of summer easterlies above 20 km, we found evidence of long-lived, ``fossil'' debris from the polar vortex even in August.

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