Nongeostrophic Theory of Zonally Averaged Circulation. Part II: Eliassen-Palm Flux Divergence and Isentropic Mixing Coefficient
- 1 January 1990
- journal article
- Published by American Meteorological Society in Journal of the Atmospheric Sciences
- Vol. 47 (2) , 215-241
- https://doi.org/10.1175/1520-0469(1990)047<0215:ntozac>2.0.co;2
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.Keywords
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