Breaking planetary waves in the stratosphere

Details Breaking planetary waves in the stratosphere Breaking planetary waves in the stratosphere

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.305..593m&link_type=abstract

Nature (ISSN 0028-0836), vol. 305, Oct. 13, 1983, p. 593-600.

Mathematics

Logic

357

Atmospheric Circulation, Planetary Waves, Propagation Velocity, Stratosphere, Vortices, Wave Propagation, Meteorological Charts, Ozone, Pollution Transport, Potential Energy, Stratospheric Warming, Troposphere, Weather Forecasting

Scientific paper

Data from 100 mbar height field and IR spectroscopic radiances taken with Channels 25 and 26 on the Stratospheric Sounding Unit on the Tiros-N satellite are used to analyze the behavior of features of the isentropic surface of the Northern Hemisphere. Estimates of Ertel's potential vorticity are derived from the hydrostatic relation and the IR radiances, which were confined to the 100 mbar level. The vertical component of the voriticity vector is also estimated, and pressure is determined on each grid point of a 580 km grid through a cubic spline interpolation procedure. Smearing effects in the temperature and morion field sensed by the satellite are noted, and the potential vorticity (Q) was found to decrease to zero near the equator. Maps of global Q for January 17 and 27, 1979 are generated, revealing that the main circumpolar vortex is capable of supporting Rossby wave propagation. The circumpolar vortex erodes prior to the onset of major stratospheric warmings. Suggestions for further resolution of large scale dynamical and eddy transport processes are given.

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