TY - JOUR
T1 - Application of a planetary wave breaking parameterization to stratospheric circulation statistics
AU - Randel, W. J.
AU - Garcia, R. R.
PY - 1994
Y1 - 1994
N2 - The planetary wave parameterization scheme developed recently by Garcia is applied to stratospheric circulation statistics derived from 12 years of National Meteorological Center operational stratospheric analyses. From the data a planetary wave breaking criterion (based on the ratio of the eddy to zonal mean meridional potential vorticity (PV) gradients), a wave damping rate, and a meridional diffusion coefficient are calculated. The equatorward flank of the polar night jet during winter is identified as a wave breaking region from the observed PV gradients; the region moves poleward with season, covering all high latitudes in spring. Derived damping rates maximize in the subtropical upper stratosphere (the "surf zone'), with damping time scales of 3-4 days. Maximum diffusion coefficients follow the spatial patterns of the wave breaking criterion, with magnitudes comparable to prior published estimates. -Authors
AB - The planetary wave parameterization scheme developed recently by Garcia is applied to stratospheric circulation statistics derived from 12 years of National Meteorological Center operational stratospheric analyses. From the data a planetary wave breaking criterion (based on the ratio of the eddy to zonal mean meridional potential vorticity (PV) gradients), a wave damping rate, and a meridional diffusion coefficient are calculated. The equatorward flank of the polar night jet during winter is identified as a wave breaking region from the observed PV gradients; the region moves poleward with season, covering all high latitudes in spring. Derived damping rates maximize in the subtropical upper stratosphere (the "surf zone'), with damping time scales of 3-4 days. Maximum diffusion coefficients follow the spatial patterns of the wave breaking criterion, with magnitudes comparable to prior published estimates. -Authors
UR - https://www.scopus.com/pages/publications/0028571926
U2 - 10.1175/1520-0469(1994)051<1157:AOAPWB>2.0.CO;2
DO - 10.1175/1520-0469(1994)051<1157:AOAPWB>2.0.CO;2
M3 - Article
AN - SCOPUS:0028571926
SN - 0022-4928
VL - 51
SP - 1157
EP - 1168
JO - Journal of the Atmospheric Sciences
JF - Journal of the Atmospheric Sciences
IS - 9
ER -