Abstract
We perform a diagnostic study of Eliassen-Palm flux divergence (□ · F), and isentropic mixing coefficient (Kyy) in the stratosphere for different seasons and for both hemispheres, taking into account nongeostrophic effects. An easily implementable procedure is given which yields a Kyy field that is consistent with advective transport. Evidence shows that the resultant time and space varying structure of Kyy, which is of the order of 105 m2 s−1 in tropics and high latitudes but larger (∼106 m2 s−1) in the midlatitudes in the jet region, leads to improved simulation of stratospheric species whose distributions are affected by dynamical transport.
