Planetary wave activity in the troposphere and stratosphere during the Northern Hemisphere winter.

Abstract

Two typical cases of correspondence are found during this period. In December and early January (period 1), the time variation of wave activity in the troposphere and stratosphere is out of phase; when the tropospheric wave activity is vigorous the stratospheric wave activity is quiet, and vice versa. In February and March (period 2) , after the stratospheric sudden warming, the tropospheric wave activity seems to propagate into the stratosphere.-from Author