Relationships between the Quasi-Stationary Rossby Waves in the Subtropical Jet and the Mass and Heat Transport in the Northern Periphery of the Tibetan High

Abstract

The relationship between the intensity of the Tibetan High and the amplitude of the quasi-stationary Rossby wave trapped in the subtropical jet over the Asian Continent is investigated for the 1983 summer. Three major warming and cooling events of the Tibetan High were seen during July and August with about 20- to 30-day intervals. These events coincided with the increasing and decreasing events of the air mass amount within the layer between 350K and 360K isentropic surfaces. All the cooling events occurred when the quasi-stationary Rossby wave was amplified along the subtropical jet just north of the Tibetan High. These Rossby wave packets played important role in cooling events by transporting the air mass with 350K to 360K potential temperatures northward out of the Tibetan High. Stratosphere-troposphere exchange events were observed at the north-eastern periphery of the Tibetan High several days after the amplifications of the quasi-stationary Rossby wave.