Low-Frequency Oscillations of the Large-Scale Stratospheric Temperature Field

Abstract

Low-frequency analyses are reported for four years of 3-day-mean satellite microwave and infrared data representative of temperatures in the stratosphere. In data representative of 30?150 mb temperatures oscillations with 39?51 day periods are observed as a tropical dipole pattern in the Indonesia/central Pacific. In addition, the first evidence is presented for such oscillations in the southeast Pacific. Furthermore, significant 39?51 day oscillations are observed in the mid- and upper stratosphere, centered near 60°S latitude.