Role of solar UV and ozone on the stratosphere-troposphere Coupling and the climate change

点击翻译按钮获取中文摘要

Effect of the solar Ultra-Violet radiation(UV) on the Southern Annular Mode(SAM) was examined through the analysis of observational data and simulations of a chemistry-climate model. When the solar activity is higher and the UV is stronger, the Polar-night Jet Oscillation(PJO), which is the dominant mode of variability of the stratosphere-troposphere coupled system in late winter/spring, is found to be more enhanced and stronger SAM signal is created at the surface. Analysis of simulations of chemistry-climate model with changing UV strengths suggests that such solar UV-SAM relationship was created through enhanced wave-mean flow interaction originated from increases of ozone and temperature in the stratosphere under high solar UV condition.